570 results about "Decreased carbon dioxide" patented technology

The present invention describes methods and systems for extracting, capturing, reducing, storing, sequestering, or disposing of carbon dioxide (CO₂), particularly from the air. The CO₂ extraction methods and systems involve the use of chemical processes, mineral sequestration, and solid and liquid sorbents. Methods are also described for extracting and/or capturing CO₂ via condensation on solid surfaces at low temperature.

The invention relates to various embodiments of an environmentally beneficial method for reducing carbon dioxide. The methods in accordance with the invention include electrochemically or photoelectrochemically reducing the carbon dioxide in a divided electrochemical cell that includes an anode, e.g., an inert metal counterelectrode, in one cell compartment and a metal or p-type semiconductor cathode electrode in another cell compartment that also contains an aqueous solution of an electrolyte and a catalyst of one or more substituted or unsubstituted aromatic amines to produce therein a reduced organic product.

Disclosed is an MCFC power generation system and a method for operating the same enabling significant reduction of CO₂ emission or substantially zero CO₂ emission by minimizing the equipment added to a general power generation facility to a minimum, enabling both high power generation efficiency and high heat recovery efficiency, enabling adjustment of the voltage and output of the fuel cell in a certain range by adjusting the cathode gas composition, enabling great variation of the ratio between the heat and electricity, and thereby enabling variable thermoelectric operation. The MCFC generation system includes a cathode gas circulation system in which the cathode gas is circulated by a cathode gas recycle blower, and a closed loop is formed. Oxygen consumed by power generation is supplied from an oxygen supply plant, and CO₂ is supplied from recycled CO₂. Combustible components in anode exhaust are burned with oxygen, the resultant gas is cooled, and water is removed. The fuel gases in the anode exhaust is recycled.

Increasing competition for fossil fuels, and the need to avoid release carbon dioxide from combustion of these fuels requires development of new and sustainable approaches for energy production and carbon capture. Biological processes for producing methane gas and capturing carbon from carbon dioxide are provided according to embodiments of the present invention which include providing an electromethanogenic reactor having an anode, a cathode and a plurality of methanogenic microorganisms disposed on the cathode. Electrons and carbon dioxide are provided to the plurality of methanogenic microorganisms disposed on the cathode. The methanogenic microorganisms reduce the carbon dioxide to produce methane gas, even in the absence of hydrogen and/or organic carbon sources.

The present invention relates to the preparation and activation of multimetallic zeolites loaded with transition metals for N₂O abatement in tail-gases from different sources. The N₂O-containing gas is brought in contact with a catalyst comprising Fe and a second, third, or any additional transition metal (Cu, Co, Ni, Mn, Cr, V), with a total metal content ranging from 0.1-1.0 wt. %, on a zeolite support (MFI or BEA) at 523-873 K. Not 10 only the combination and loading of metals, but also the method of incorporation in the zeolite and its activation is essential to obtain active and stable catalysts. The synergy between metals was observed in Fe—Cu, Fe—Co, and Fe—Co—Cu systems, but not with combinations of iron with other transition metals. The optimal catalysts show high N₂O conversions (>80%) at temperatures <623 K and stable behaviour for >2000 hours in pilot-scale tests with a zeolite-coated monolithic reactor.

A reduced carbon dioxide emissions system and method for providing power for refrigerant compression and shared electrical power for a light hydrocarbon gas liquefaction process.

A process for converting coal and other hydrocarbon solid fuel feedstocks comprises reacting the feedstock in a first stage exothermic hydropyrolysis reaction zone with a hydrogen-rich gas stream for producing methane. The methane from the first reaction zone is dissociated in a second endothermic reaction zone to produce solid carbon and hydrogen-rich gas using heat mainly from the first reaction zone. All heat to promote the desired extents of reaction in each reaction zone is provided solely from the exothermicity of chemical reactions in the process. The majority of the gas is recirculated from the second reaction zone to the first reaction zone. Hydrogen gas is recovered to produce electrical energy for reducing carbon dioxide emissions.

An airlift circulation micro-algae photoautotrophic-heterotrophic coupling photobioreactor for wastewater treatment carbon emission mitigation includes feeding pipe, micro-algae heterotrophic zone, gas-liquid separation chamber, micro-algae phototrophic zone, bottom backflow zone, discharge pipe, and the liquid drained zone.

The invention discloses a combustion heating control device and method used for a gas water heater. The combustion heating control device comprises a water inlet pipe, a heat exchanger, a water outlet pipe, a heater and a control module. An air inlet pipe, a gas pipe and an exhaust pipe are arranged on a shell of the heater. An isolating and mixing bin and a combustion bin are arranged in the shell. A water inlet flow sensor and a water inlet temperature sensor are arranged on the water inlet pipe. A water outlet temperature sensor is arranged on the water outlet pipe. A vortex draught fan, an air proportional valve and an air flow sensor are arranged on the air inlet pipe. A gas proportion valve is arranged on the gas pipe. A tail gas temperature sensor and an air pressure sensor are arranged on the exhaust pipe. An igniter and an oxygen sensor are arranged in the combustion bin. The control module is connected with all the sensors, the vortex draught fan, the air proportion valve, the gas proportion valve and the igniter. An energy-saving control method of the combustion heating control device is included. The combustion heating control device has the advantages of being sufficient in gas combustion, low in manufacturing cost, concentrated in heat, and capable of saving gas, reducing carbon dioxide emission and reducing carbon monoxide poisoning.

The invention relates to a preparation method for a zirconium-contained rare-earth composite oxide. At a certain ratio, rare earth (cerium, yttrium, praseodymium or terbium) is mixed with zirconium to burden, or rare earth (cerium, yttrium, praseodymium or terbium) and zirconium are mixed with at least one of other metal ions (aluminum, barium, magnesium, strontium, titanium, manganese, ferrum, copper and hafnium) to burden. A magnesium bicarbonate or/ and calcium bicarbonate aqueous solution prepared from raw materials of magnesium or/ and calcium minerals or oxides and hydroxides by at least one working procedure of roasting, digesting, mixing size, carbonizing and the like can serve as a precipitator to carry out precipitation so as to obtain at least one of rare earth and zirconium composite carbonate and subcarbonate, and the at least one of rare earth and zirconium composite carbonate and subcarbonate is further roasted to obtain a zirconium-contained rare-earth composite oxide product. In the preparation method, cheap calcium or/ and magnesium minerals or low-purity oxides and hydroxides can serve as initial raw materials to replace common chemical industry precipitators, such as ammonia water, ammonium bicarbonate, sodium carbonate, sodium hydroxide and the like, substances, such as magnesium, calcium, carbon dioxide and the like can be effectively circulated and utilized so as to greatly lower the production cost of the zirconium-contained rare-earth composite oxide, such as ceria-zirconia, yttrium zirconium, praseodymium zirconium, terbium zirconium and the like. In addition, in the production technology disclosed by the invention, no ammonia nitrogen wastewater, high-salinity wastewater and the like are generated, carbon dioxide greenhouse gas emission amount is reduced, the preparation technology is environmentally-friendly, and environment pollution is avoided.

The invention discloses a technological method for synthesizing methanol by using hydrogen and carbon dioxide. The method mainly comprises the following steps that the hydrogen and the carbon dioxide are subjected to catalytic reaction which is the first step in a first reactor under the action of copper-based hydrogenation catalyst, so as to obtain methanol, water and carbon monoxide; separation is performed in a gas-liquid separator; liquid methanol and water are separated out; gaseous carbon monoxide, hydrogen and carbon dioxide enter a second reactor; and under the action of a methanol synthesis catalyst, synthesis reaction which is the second step is carried out, so as to obtain crude methanol and water. The method has the advantages that the method uses the hydrogen and the carbon dioxide as raw materials to synthesize the methanol, can fully utilize carbon dioxide resource which is generally regarded as waste gas to be discharged to synthesize the methanol easily, is low in reaction temperature, high in carbon dioxide conversion rate, simple in technological process, low in energy consumption and easy to realize industrialization, and develops a new way to produce methanol raw materials while reducing carbon dioxide emission into atmosphere.

This invention concerns a fluid catalytic cracking (FCC) process with reduced carbon monoxide emission which modifies the regeneration phase of the spent catalyst by using pure oxygen without the need for dilution when burning coke adhering to the catalyst. In addition, this invention improves the reconditioning stage of the catalyst, incorporating a reconditioner supplementary to a conventional reconditioner which employs nitrogen as a carrier gas in the reconditioning of the already regenerated catalyst.

The invention provides a device for producing microparticles by supercritical fluid auxiliary spray. The device consists of a carbon dioxide cylinder, a cooling water tank, a valve, a plunger pump, a heater, a gas-liquid mixing chamber, a pressure monitoring system, a heating jacket, a valve, a nozzle base, a drying box, a valve, a constant flow pump, a solvent storage tank, a heating jacket, a cyclone separator, a collection tank, an air pump, an air heater, a supercritical carbon dioxide storage tank, an air filter and a nozzle. The device provided by the invention can be applied to the preparation of pharmaceutical microparticles or nanoparticles, and drug-loaded microparticles or nanoparticles containing carriers. The device is characterized by reasonable design and low cost and adopts the integrated insulation design of the gas-liquid mixing chamber and the nozzle, which can reduce the nozzle temperature drop caused by the injection of the mixture of carbon dioxide and solvent, can ensure the spray to go smoothly; can decrease the change of particle sizes caused by temperature fluctuation, can continuously, efficiently and conveniently prepare and collect microparticles, and can be applicable to industrialized continuous production.

Photocatalysts for reduction of carbon dioxide and water are provided that can be tuned to produce certain reaction products, including hydrogen, alcohol, aldehyde, and/or hydrocarbon products. These photocatalysts can form artificial photosystems and can be incorporated into devices that reduce carbon dioxide and water for production of various fuels. Doped wide-bandgap semiconductor nanotubes are provided along with synthesis methods. A variety of optical, electronic and magnetic dopants (substitutional and interstitial, energetically shallow and deep) are incorporated into hollow nanotubes, ranging from a few dopants to heavily-doped semiconductors. The resulting wide-bandgap nanotubes, with desired electronic (p- or n-doped), optical (ultraviolet bandgap to infrared absorption in co-doped nanotubes), and magnetic (from paramagnetic to ferromagnetic) properties, can be used in photovoltaics, display technologies, photocatalysis, and spintronic applications.

The present invention relates to a process for reducing coal consumption in coal fired plant with fluidized-bed drying, namely a fluidized-bed drying system is provided between a coal powder bunker as well as a weighing belt and a coal grinding mill of the prior coal fired boiler generating set, and superheated steam which has done partial work is extracted from an steam turbine and used as a drying medium, moisture contained in the coal powder is evaporated with sensible heat and latent heat of the superheated steam, water resulted from the condensation of the superheated steam is fed into a deaerator of the steam turbine via a condensate pump for recirculation. The present invention has advantages of reducing coal consumption and saving coal, recovering residual heat, reducing emission of carbon dioxide and adopting to the national industrial policy on energy saving and emission reduction.

Carbon dioxide emissions within a refinery are reduced by reforming a hydrocarbon containing feed at low pressure to enhance the conversion of methane to hydrogen and carbon monoxide and thereby reduce methane slip. The hydrocarbon containing feed is composed entirely or at least in part of a refinery off gas. The resulting reformed stream is then subjected to water-gas shift conversion to form a shifted stream from which carbon dioxide is separated. As a result of the separation and the low pressure reforming, hydrogen containing fuel gas streams, that are thereby necessary lean in carbon dioxide and methane, are used in firing the steam methane reformer and other fuel uses within the refinery to reduce carbon dioxide emissions. The carbon dioxide that is separated can be sequestered or used in other processes such as enhanced oil recovery.

The present invention relates to a method for the production of stable humus- and nutrient-rich and water-storing soil substrates with properties of anthropogenic soil types (Terra Preta) in which pyrogenic carbon, organic biomass, and/or natural mineral materials are used as initial materials in a fermentation process. The soil produced or treated according to the invention leads to a sustainably high soil yield such that mineral fertilizers are no longer needed for agricultural use. Moreover, the soil is suitable for use as a soil substitute, for use as a soil supplement, for greening developments, for preventing erosion, for improving regional water supplies, for preventing floods, for preventing climate change, for reducing carbon dioxide content in the atmosphere, for waste water cleaning and treatment, for exhaust air cleaning and building air purification, for creating material flow cycles from biogenic waste and/or waste water in order to develop and utilize land use and development systems.

The invention discloses a biological carbon soil conditioner and a preparation method thereof. The biological carbon soil conditioner mainly comprises the following components in parts by weight: 40-60 parts of biological carbon, 10-25 parts of pumice and 20-45 parts of bentonite, wherein the biological carbon is obtained by performing anaerobic carbonization on at least one of crops straw, wooden meal, deadwood or deciduous leaves at the temperature of 300-1000 DEG C; and the biological carbon soil conditioner is prepared by the following the steps: mixing the raw materials, adding 15-35 parts of water by weight, stirring, extruding, pelletizing and packaging components. The invention can improve soil physicochemical property, enhance soil organic matter content and fertilizer utilization rate, and reduce carbon dioxide burst size.