This disclosure relates to the utilization of CO2, and other gases, with mineral feedstock to synthesize products.
The excess generation of CO2 in human activity has resulted in a number of problems of human and animal life. The continued increase in emission of CO2 from industrial activity gives rise to a series of risks and detrimental effects. These include the impact on the radiation balance of the atmosphere, the so-called “greenhouse” effect or climate change as an exemplary consequence of increasing CO2 emission. This carbon overload creates the greatest risk of irreversible changes if it continues to accumulate unabated in the atmosphere. Much technological development is centered on reducing the emission of CO2. However there is also a technological movement of capturing and using CO2 for beneficial purposes. One such technical area is in methods for utilizing CO2 in bioreaction with mineral feedstocks to synthesize products. The synthesizing of products can be enhanced by introducing into the bioreactive process the addition of photolysis in combination with general mixing of CO2 with the selected feedstock.
In the above figures section illustration is shown by section fill lines.
This disclosure presents methods for utilizing CO2, and other gases, with mineral feedstock to synthesize products. The synthesized products, as the result of liquid, solid, gas photo-chemical reactions within the advanced bioreactor of the disclosed embodiment, are precipitated raw material for multiple end use consumer and industrial products. Waste heat, pressure and torque produced from the bioreactor is utilized for generating electricity and or heat exchange for environmental conditioning through a combination of energy recovery devices for energy efficiency. Energy recovery devices offsets and lower the cost of operating the reactor as the disclosed reactor integrates photolysis via ultra-violet light, as an integral component, of a reactor system, composed also of an active mixer-agitator assembly, pressure and vacuum vessel chamber, heat source, and ports for media ingestion. The disclosed reactor is designed to simulate a wide range of environmental conditions that are conducive to transforming gaseous, solid, and liquid feedstock, like carbon dioxide —CO2, and other feedstocks that are inorganic and/or organic in an aqueous medium, into inorganic and organic product.
Carbonates, CO3, are the result of photo and chemical dissociation of compounds and subsequent binding into compound carbonate form through ion exchange. The result of such photo-chemical, electro-chemical and natural kinetic reactions binds CO2 carbon dioxide with inorganic mineral silicates, in long term, stable form as carbonates. Sources of CO2 may come from, but are not limited to, direct air capture of CO2 from the free stream atmosphere, and or capture from exhaust, flue gas of industrial plants, factories, and buildings. More particularly, the present disclosure describes integration of an energy recovery device as part of the disclosed reactor. Potential products resulting from photo-chemical reactions within the advanced bioreactor of the present embodiment, may include but are not limited to, inorganic carbonates, fluid and gel medium, gases, cell and plant cultured foodstuff, reagents, solid inorganic oxides, mineral feedstocks, and organic bodies like enzymes and microbes, for human and non-human utility and consumption.
Generally, the products derived from photo-chemical reaction in the advanced bioreactor of the disclosed embodiment, can be broadly categorized as liquids, solids and gaseous product for human and non-human consumption and utility.
The disclosed bio reactor with photolytic and energy recovery capability is used, but is not limited to, carbonation of CO2 with minerals and additives under high temperature and high CO2 partial pressure, which is also denoted as P(CO2). CO2 is a greenhouse gas and the primary gas released into the atmosphere responsible for the climate crisis. The IPCC-International Panel on Climate Change has set targets and has called for the active removal of CO2 through direct air capture from a myriad of technical and natural solutions, many of which do not yet exist. The reactor disclosed utilizes direct air captured CO2, industrial emitter CO2, or separated CO2 from an industrial flue gas waste stream and transforms CO2 through photo and chemical reactions into carbonates, and in the process, provides a stable long term storage solution and use for sequestered CO2. This type of carbonation is known as accelerated weathering or enhanced weathering. A similar process occurs naturally when either gaseous CO2 or carbonated water, which is water enriched with CO2, reacts with silicates and other minerals to produce partial carbonates by volume and weight. However, the time scales for natural carbonation are hundreds and thousands of years, if not several thousand millennium or more.
The disclosed photolytic reactor with energy recovery can complete a full carbonation batch of CO2 within minutes and hour(s) and offset its energy consumption with energy recovery devices. Other types of inert, noble, allotrope, and chalcogen group gases, that can be utilized as feedstock within the reactor include, Nitrogen (N2), Argon(Ar), Krypton (Kr), Ozone (O3) and Oxygen (O2).
Generally, bioreactor types fall into 2 broad flow categories: horizontal and vertical. Processing flow, either vertical or horizontal comes with advantage and drawbacks. Vertical reactors are structural designs of a cylinder housing, usually steel alloy material, and include a mixer/propeller (single stage) with sufficient space to house media, like minerals, additives, and CO2, including head space. The disclosed photolytic reactor with energy recovery devices, can be pressurized by a gas booster pump that injects CO2 up 2200 pounds per square inch, referred to by abbreviation, psi, and expressed as P (cot) throughout the description of the disclosed embodiment. The advantages of vertical reactors include simple construction that facilitates scaling to sizes of 150 cubic meter volume and higher.
Vertical reactors can house mixers or impellers that agitate the slurry and or media under reaction There are several disadvantages to vertical type reactors. Firstly, gravity is always pulling the slurry downwards causing un-swirled or un-agitated media to sink to the bottom where carbonation may occur slowly or not at all. Secondly, a single mixer would struggle to actively mix media that has sunk to the bottom economically. Without persistent agitation, a passivating silicone layer will form that inhibits carbonation of silicates slowing reaction kinetics, namely the absorption and subsequent carbonation of CO2. Thirdly, as volume and mass of the media and/or slurry per batch increase, slurry and/or mediaweight may make vertical mixing a slower process than expected at 150 cubic meter volume scale and larger, which may result in efficiency losses in per batch throughput.
Horizontal Axis, 1-Step Reactors hold key advantages over vertical, stirred reactors. The first advantage is the efficient use of capacity by volume. The entire volume of the reactor is available for carbonation with distributed weight displacement of the slurry, increase in slurry particle surface area from horizontal spreading and mixing, unlike a vertical type of reactor. The second advantage is improved flow dynamics (pressure) from a horizontal venturi nozzle, venturi type design as compared to a vertical, cylindrical and/or spherical geometry-type design.
The present reactor in a central pressure body portion employs a venturimeter structure having a throat or converging part that lies between converging and diverging parts of the venturi. The throat portion defines the narrowest part through which fluid flow converges and flows at increased velocity and decreased pressure. The diverging part extends away from the throat, increasing in cross section wherein the fluid flowing through it diverges.
Horizontal flow reactors perform at a higher throughput per batch since the geometry of the nozzle results in efficient flow per volume of the slurry and/or media through the constricted section of the convergent-divergent venturi nozzle design. The basic physics are defined by the Bernoulli effect and the Venturi effect. As the mixers transfers the aqueous slurry to the right and left, side of the venturi reactor, and right to left from reversing electric motor rotation, the slurry or media must pass through a constricted section of the reactor which results in an increase in velocity and drop in pressure of the slurry in transit. The heat band or heat element is placed around the outside surface of the constricted section which then heats the core of the reactor, and in turn heats the slurry in transit through the constricted section of the venture nozzle reactor.
Active mixing passes the aqueous slurry through the heated, constricted section of the venturi. Heat is then distributed, evenly and faster throughout the reactor, relative to a cylindrical, spherical, or non-venturi reactor body design. The increase in heating distribution results in faster times to optimal reaction temperature.
Moreover, the present embodiment incorporates a plurality of ultra-violet (UV)-A, UV-B and UV-C light emitting diodes, LED, excimer lamps, lamps, and to speed up dissociation of the minerals, gas, and additives in the slurry, within the cavity of the reactor vessel. As light energy approaches shorter wave lengths, it becomes more energetic. This light energy and intensity in the far, short, and vacuum ultra-violet, VUV, range can dissociate chemical compounds, in the presence of other gases, and independently based upon local reactor heat, and pressure conditions. UV-C and UV-B light energy provide an ancillary benefit as germicidal agents during the reaction process. UV-C light is particularly noted for its ability to neutralize germs, bacteria, viruses, and other pathogens. The complete ultraviolet wavelength of the UV and visible light emitters, diodes, and lamps integrated into the bioreactor, range from vacuum ultraviolet (VUV) of 100 nm to 200 nm, UV-C from 200 nm-280 nm, UV-B from 280 nm-315 nm, and UV-A from 291 nm-400 nm, as well as visible light from 400 nm-700 nm. All disclosed UV and visible light emitters are non-ionizing.
UV-C is a highly energetic spectrum of ultraviolet light that is non-ionizing, electro-magnetic radiation at wavelengths between 125-200 nanometers (nm). UV light is used in three major capacities in the advanced bioreactor of the disclosed embodiment which include, (a) water purification for carbonation enhancement from OH (hydroxyls) and O3 (ozone) produced by UV-C; (b) generation of fast reacting OH (hydroxyls) that bind with the leached minerals, calcium or magnesium, or other inorganic and organic feedstock, to create hydroxides, and (c) UV-C generated OH can be reacted with CO (carbon monoxide) and O (Oxygen) which are by-products of UV-C at a wavelength of 160 nm, then recombined to create CO2 products for use in mineral carbonation within the reactor or for storage and use elsewhere.
General equations governing photo-chemical reaction kinetics under specific heat, pressure, resident time, ultraviolet dosing, solid mineral feedstock, gas inputs, and general products of the bioreactor of the disclosed embodiment are shown in the following paragraph. All inputs in the described reaction are inorganic and do not consider organic inputs for bio-mineralization or bio-carbonation for enhanced weathering of inorganic silicates.
The mineral wollastonite is used as in example 1. Wollastonite, with a general chemical compound of calcium silicate, CaSiO3, the mineral input, reacts with CO2 to give calcium carbonate (CaCo3) and silicon dioxide (SiO2) within the reactor of the disclosed embodiment.
CaSiO3+CO2→CaCO3+SiO2 equation (1)
The reaction is much more effective in the aqueous phase. When the water H2O absorbs the CO2, the aqueous phase becomes acidic with the following species existing simultaneously, given by:
CO2+H2O→H2CO3 equation (2)
H2CO3→←H+HCO−3 equation (3)
HCO−3→←H++CO32− equation (4)
H2O→←H++OH− equation (5)
Then, the calcium contained in the wollastonite dissolves into the aqueous phase as follows:
CaSiO3+2H+→Ca2++SiO2↓+H2O equation (6)
Ca2+CO32−→←CaCO3↓ equation (7)
The resident time for the reaction to occur in this example is thirty minutes to six hours and the particle size of the Wollastonite referenced is 38μ (microns). Active mixing is 1500 revolutions per minute (rpm). Temperature maximum is 400° F. Internal bio-reactor pressure in approximately 400 pound per square inch (psi) or 30 bar of PCO2 partial pressure.
In the next example 2, UV-C dosing is used. The natural photoexcitation (hν), production of hydroxyls (OH) under atmospheric operating conditions in the upper atmosphere, is artificially re-produced with UV-C≈(λ160 nm-172 nm) in the bioreactor of the disclosed embodiment. M is a collider gas typically Nitrogen.
The following general equations describe the photo-chemical reaction,
O3+hν→←O2+O(3P) equation (8)
O(3P)+O2(+M)→O3(+M) equation (9)
O(3P)+H2O→2OH equation (10)
Compressed air and O3, which is a by-product, of UV-C photolysis, can be injected into the bioreactor of the disclosed embodiment to supplement hydroxyl (OH) formation, giving,
CaSiO3+2H++OH+hν→Ca(OH)2+SiO2(s)+H+ equation (11)
CO2 is then injected into the reactor, which gives,
CO2+Ca(OH)2+SiO2(s)→CaCO3+H2O+SiO2(aq) equation (12)
The hydrated slurry is removed from the bioreactor and dried at temperature T≈212° F. Water vapor H2O(aq.-vapor) is collected, purified, and recycled for later use, which gives,
CaCO3+H2O+SiO2(aq)+ΔH→CaCO3+SiO2 equation (13)
The resident time in example 2 is estimated to be five minutes to one hour, with the particle size of the Wollastonite referenced at 38μ (microns). Temperature is 250° F./400° F. Pressure conditions may vary from 200-400 pounds per square inch (psi) of PCO2 partial pressure. Active mixing is 500 rpm to 1500 rpm.
The disclosed reactor incorporates energy recovery devices that include, but are not limited to, ring stator magnets coupled to the blade tips of the propellers and/or motor shaft in different configurations, that can generate DC power when the turbine blades are rotating; compressed CO2 gas jets directed at shaft mounted turbines and such shaft is also coupled to an electric generator, whereas high pressure fluid energy from CO2 gas jets translate to mechanical torque of the multi-element turbines. In addition, high pressure steam and compressed air may also be injected and re-injected into the reactor to induce turbine rotation and if the rotating turbine shaft is also coupled to an electric motor, direct current electricity is produced. Thermo electric generators, abbreviated TEG's, are solid state devices using the Seebeck effect to create an electric charge from heat flux. TEG's are integrated into the reactor design. Creating electricity in the form of DC and/or AC power offsets the energy consumption required to operate the disclosed reactor at optimum heat and pressure conditions necessary for carbonation and other type reactions.
The bioreactor of the present embodiment due to its wide functioning range of temperature, pressure and vacuum, mixing, artificial UV, and visible light, also has further application in the production of foods, specifically, cell cultured foods like fish, meats and certain vegetables and plants for human and animal consumption. The reactor volume, material, and design for both inorganic and organic product can be scaled from 0.014 cubic meters to 150 cubic meters of volume for processing and culturing tissue and organic matter for cell cultured foods in large batches.
The preferred reactor materials are stainless steel and or aluminum. Other light metal alloys, glass, and sapphire attachments may be preferred to some type of plastics for scaling the volume of the reactor. Plastics selection must be done with diligence, due to the risk of transfer of PFAS/PFOA/PFOS which are acronyms for forever chemicals, and potentially toxic chemicals which may exist in plastic products and potentially transfer to the cultured batches incubating in the reactor. However, certain plastics, molded carbonates and polycarbonates that are PFAS/PFOA/PFOS free can be used as material for the reactor lining body. State of the art bioreactors incorporating Teflon material, which is made from PFAS/PFOA/PFOS risk transfer of the group of forever chemicals into the cultured cell organic products, such as meats, fish, and plant products, risking human and non-human ingestion of forever chemicals from transference.
The production of muscle cells for cell cultured meats can be separated into two phases: a proliferation phase where the cells divide and multiply, and a differentiation phase where cells differentiate into skeletal muscle cells, then fuse into multinucleated myotubes. Both phases require different culture environments. During the differentiation phase, a 3D support structure might be required so the skeletal muscle cells can form muscle tissue.
Compared to current state of the art bioreactors, the bioreactor of the disclosed embodiment can diffuse nutrient flow equally throughout the volume and length of the reactor, maintain zonal heating or section heating and cooling, as well as distribute heating, evenly through the cultures in the reactor through variable speed mixing, reverse flow mixing and heat exchange from gas injection.
An ultraviolet (UV) light emitting source and/or a visible light emitting source can be used to irradiate (dose) each tissue culture enclosed within the bioreactor using fiber optic cables, or directly from UV or visible light sources housed withing the cavity of the bioreactor or circumferentially mounted along the outer walls of the bioreactor. UV and visible light dosing can enhance certain cell culture rate of development and is practical for bio photonic sequencing of various cell tissue cultured meats, poultry, fish, certain plants, and vegetables.
The primary method of enhancing cell cultured tissue rate of development from bio photonics is in the germicidal benefit to the nutrient flow and cell tissue cultures incubating in the bioreactor. Viruses, microbial bacteria, (yeast, fungi), and mycoplasma, can cause cell contamination resulting in the loss of cell tissue, and potentially contamination of the complete batch housed in the reactor. UV-C/B/A light is a potent germicidal agent and RNA disruptor to bacteria, viruses, and pathogens, preventing bacterial and viral colony spread in the tissue cultures.
The bioreactor of the present embodiment has multiple ports for injection of reagents, nutrients, gases, and exhaust ports for the removal of slurry waste and cell waste by-products. UV lighting can be used to purify and recycle water that is used for the nutrient broth.
The disclosed next-generation, photolytic reactor with energy recovery capability operates differently than previous, vertical mount type reactors found in laboratories, institutions, and research facilities. The bioreactor design utilizes a multi-element axial propeller agitator in combination with ultra-violet/UV-A/B LED, liquid emitting diodes and excimer lamps, in the wavelength of 200-400 nanometers, nm, as well as UV-C directed light energy, between 140 nm to 200 nm., to speed up the time to carbonate CO2 with magnesium and calcium silicate minerals as well as other mineral waste, oxide feedstocks and desulfurized calcium sulfates. The resultant effect of photolysis, high temperatures, and pressure is the enhanced carbonation of calcium and magnesium silicates in the presence of CO2 as described in Example 2 in Background Description of the preferred embodiment.
The carbonate precipitate that is produced can be but is not limited to, magnesium carbonate (MgCO3), calcium carbonate (CaCO3), dolomitic carbonates ([Mg/Ca]CO3), iron carbonate, (FeCO3), potassium carbonates (K2CO3), and sodium carbonates (Na2CO3). The carbonates then become feedstock materials for a plethora of industrial processes and end use products. The present embodiment consists of reactor pressure vessel housing, cap ends and quartz viewports that can be pressurized up to 2200 psi, pounds per square inch, or 150 atm, atmospheres, to emulate conditions in Earth's upper mantle. The reactor environment can also be de-pressurized to emulate low atmospheric conditions, and vacuum conditions.
The disclosed reactor will also withstand heat up to 2000° F. under ambient conditions; up to 625° F. under high pressure conditions, and freezing temperature to negative, −20° F. Heating element(s), internal and externally mounted, provide thermal energy for high heat environment simulations. In industrial or plant exhaust settings, the heat from the flue gas exhaust compliments integrated bioreactor heating elements and may result in lower thermal energy consumption. Multi-element mixers agitate exponentially more of the slurry surface area relative to a single stage agitator, commonly used, which will help increase time to precipitation at high temperatures.
During precipitation from mineral carbonation, a passivating silicone layer or PL have been found to form, from past research and experiments, and re-form during the carbonation process, which inhibits the time to precipitate carbonates. In natural weathering of mineral and rock formations, laterite layers occur which are weathered surface areas. Laterite strata prevent or inhibit the un-weathered mineral surface area beneath it from weathering, unless the layer is fractured, exposed, or removed. The multi-element mixers disclosed operates up to 1500 rpm to persistently chip away and fracture the PL, passivating layer that forms and re-forms at high temperatures and pressure during the carbonation process.
UV-C photolysis induces hydroxy radical (OH), which in turn can bind with leached calcium and magnesium silicates to create hydroxides that react with injected CO2 to then create carbonates in an aqueous slurry that may contain additives or admixtures. Artificial UV-C light emitters disclosed as part of the reactor, emulate photo dissociation of Oxygen when exposed to UV-C from sunlight, like ozone creation, in the upper atmosphere. Photolysis, also called photo dissociation and photo decomposition, is a chemical reaction in which an inorganic chemical or an organic chemical is broken down by energetic photons and is the interaction of one or more photons with one target molecule. By using photolysis with UV-C directed, light, reaction times per reactor batch of mineral feedstocks and CO2 are significantly enhanced. Photolysis can potentially reduce carbonation times to 1 hours or less. Throughout the embodiment, the reference to UV or visible light radiation or dosing is limited to non-ionizing wavelengths of UV and visible light waves.
Further, the disclosed reactor recovers energy consumed during the reaction process through implementation of blade tip ring permanent magnet generators. The mixer turbine acts as the rotor of a generator and is enclosed by stator ring housing with windings to complete the generator configuration. Additionally, pressure energy recovery systems are used as part of the disclosed reactor design that transfer and re-inject waste pressure during and post reaction, to offset energy inputs required for operating the reactor system.
The electric motor within the housing cover 1 is mounted to a frame stand 9, which supports the electric motor. Alternate facing flange pairs 2 and 6, typically referred to as male-female slip-on flanges are shown. The straight section pipe cap end 19, is fastened by weldment to flanges 2. Flanges 2 are then joined together by high strength, high temperature fasteners 2.1. In Section B, the venturi nozzle 11, 12, 12.1, and 13 form the central pressure body of the bioreactor system of
The sleeved support tube 14 allows the exhaust nozzle 15 to rotate 360°, degrees, to direct ozone waste into water tanks or storage bins of different stack height. Ozone, chemical formula, O3, is generated by the dissociation of ambient Oxygen, chemical formula O2, from high intensity, UV-C LED, light emitting diodes, and lamps during batch reaction. The UV nacelle-shield fairing 8 is also a barrier shield to UV-C light and eliminates any chance of human exposure to UV-C light energy when installed. Two ports 3, 4, allow for media feedstock and CO2 gas to be injected into Section B, then the gas diffuses through Sections A, B and can be exhausted from Section B of the bioreactor system. A heating element or heating band 5 controls the thermal environment of the reactor assembly in
The rotation of the main drive shaft 21, imparts rotation on the mixer-agitator turbines, which agitates, mixes and disperses the slurry and/or media, and any other liquid, solid or gaseous feedstock, organic or inorganic, that is in the reactor. The term slurry is defined as a mixture of inorganic mineral feedstock of various particle sizes, combined with water and additives. The slurry may be pre-mixed and injected into the reactor or the slurry may be created in the reactor from separate injection of water, additives, and inorganic mineral feedstock.
Through mixer rotation, heat is evenly distributed throughout sections A, B, and C of
The UV or visible light emitter 23 can now dose the media under reaction at high or low temperature and high or low pressure, or in a vacuum, to enhance reaction kinetics. An additional pressure tap port 4.1, allows high pressure CO2 and steam to be injected onto the turbine blades inside the venturi nozzle sections 12, 12.1,
The band heater or heating element 5,
In the case of organic feedstocks, like cell tissue cultures, pre-loading the perforated cylinders 33, 33.1 with the cell tissue organic culture could be preferred to injection of the cell tissue culture. Each cylinder 33, 33.1 perforations allow for organic and inorganic nutrients injected into the reactor body cavity of
Multiple UV and visible light-LED, light emitting diodes and lamps 23 are housed and supported by the plate mount structure 16,
In
The mixer-agitator axial flow turbines 26.2, 26.1, 25.1, 25.2,
Each port(s) 34, 35, 36, 37,
The heating unit or heat element 5,
The foregoing detailed description of the exemplary and preferred embodiments is presented for purposes of illustration and disclosure in accordance with the requirements of the law. It is not intended to be exhaustive nor to limit the invention to the precise form or forms described, but only to enable others skilled in the art to understand how the invention may be suited for a particular use of implementation. The possibility of modifications and variations will be apparent to practitioners skilled in the art. No limitation is intended by the description of exemplary embodiments which may have included tolerances, feature dimensions, specific operating conditions, engineering specifications, or the like and which may vary between implementations or with changes to the state of the art, and no limitation should be implied therefrom. This disclosure has been made with respect to the current state of the art but also contemplates advancements and that adaptations in the future may take into consideration of those advancements namely in accordance with the then current state of the art.
This application claims benefit of Provisional Application No. 63/030,916 filed on May 27, 2020, entitled Photolytic One Step Reactor with Energy Recovery the entire content of which are incorporated herein in full.
Number | Date | Country | |
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63030916 | May 2020 | US |