A catalytic system for CO.sub.2 capture and sequestration. The system includes a reduction cell for separating a carrier medium having an anode generating oxygen, a cathode generating hydrogen, and a CO precursor from the carrier medium. In addition, the system includes a power supply for providing electrical power to the anode and the cathode. An electrolysis process occurs where oxygen, hydrogen, CO precursors are produced. The anode and the cathode include a plurality of geometrical constructs to increase an active surface area of a catalytic surface of the anode and cathode to increase an efficiency of the electrolysis process. The geometrical constructs may include vias and pillars. In one embodiment, a capillary action is produced for CO.sub.2 sequestration across the catalytic surface having a plurality of vias.

A process for recovering catalyst from a fluidized catalytic reactor effluent is disclosed comprising reacting a reactant stream by contact with a stream of fluidized catalyst to provide a vaporous reactor effluent stream comprising catalyst and products. The vaporous reactor effluent stream is contacted with a liquid coolant stream to cool it and transfer the catalyst into the liquid coolant stream. A catalyst lean vaporous reactor effluent stream is separated from a catalyst rich liquid coolant stream. A return catalyst stream is separated from the catalyst rich liquid coolant stream to provide a catalyst lean liquid coolant stream, and the return catalyst stream is transported back to said reacting step.

The present invention relates to a method for recovering carbon dioxide from an absorbent rich on gaseous carbon dioxide, in which the energy used for separation of absorbent and carbon dioxide in a stripping column is reduced by using two stripper columns having different operating pressures and recycling heat transfer fluid from the stripper off gas in an energy efficient manner.

The polymer material of the invention is an amine-containing polymer that contains a polymer of a monomer mixture consisting of a monofunctional monomer and more than 10 mol% and 30 mol% or less of a polyfunctional monomer, and exhibits a large reversible gas absorption amount though having a low water content. An efficient production method for the polymer material of the invention includes a polymer synthesis step of synthesizing a polymer by polymerizing monomers in a reaction mixture containing a monofunctional monomer, a polyfunctional monomer, a solvent and an initiator, and an amine infiltration step of infiltrating an amine-containing processing liquid into the polymer, wherein the total monomer concentration in the reaction mixture is 0.7 mol/L. or more, the proportion of the polyfunctional monomer among the monomers contained in the reaction mixture is 10 to 30 mol%. When the monofunctional monomer has an amino group, the amine infiltration step can be omitted.

A CO.sub.2 recovery unit includes a CO.sub.2 absorber that brings a gas having a low CO.sub.2 concentration into countercurrent contact with a CO.sub.2 absorbent to remove CO.sub.2 from the gas. The CO.sub.2 recovery unit further includes a first absorbent circulation line that supplies a CO.sub.2 absorbent from a first CO.sub.2 absorption section as a first circulation solution to an upper side of a first CO.sub.2 absorption section; a second absorbent circulation line that supplies a CO.sub.2 absorbent from a second CO.sub.2 absorption section as a second circulation solution to an upper side of a second CO.sub.2 absorption section; and an absorbent discharge line that discharges a part of the first circulation solution from the first absorbent circulation line and supply the part of the first circulation solution as a discharged solution to the second absorbent circulation section.

In a hydrocarbon-fed steam methane reformer hydrogen-production process and system, carbon dioxide is recovered in a pre-combustion context, and optionally additional amounts of carbon dioxide are recovered in a post-combustion carbon dioxide removal, to provide the improved carbon dioxide recovery or capture disclosed herein.

A gas pressurized separation system strips a product gas from a stream yielding a high pressure gaseous effluent containing the product gas such as may be used to capture CO.sub.2 from coal fired post combustion flue gas capture and to purify natural gas, syngas and EOR recycle gas. The system comprises a gas pressurized stripping column allowing flow of one or more raw streams in a first direction and allowing flow of one or more high pressure gas streams in a second direction, to strip the product gas into the high pressure gas stream and yield a high pressure gaseous effluent that contains the product gas. The process can further comprise a final separation process to further purify the product gas from the GPS column. For CO.sub.2 product, a preferred energy efficient final separation process, compound compression and refrigeration process, is also introduced.

Provided is an acetic acid production method including an absorption step that enables efficient and energy-saving separation of methyl iodide in a downstream step, when provided, of separating methyl iodide from a solution after the absorption of methyl iodide. The acetic acid production method according to the present invention includes an absorption step in an acetic acid production process. In the absorption step, at least a portion of offgases formed in the process is fed to an absorption column, is brought into contact with an absorbent including an organic acid having a higher boiling point as compared with acetic acid to allow the absorbent to absorb an iodine compound from the offgas, and a gas having a lower iodine compound concentration as compared with the offgas, and a solution containing the absorbent and the iodine compound are thereby to be separated.

Systems and methods of producing a concentrated solution from a gas stream are disclosed. The method of producing a concentrate solution includes introducing the gas stream having the contaminant into an absorption chamber, introducing a dilute liquid having the contaminant into the absorption chamber, at least one of the gas stream and the dilute liquid being at an elevated temperature, and contacting the gas stream with the dilute solution to produce a liquid-enriched gas stream and a concentrate solution. The systems for producing a concentrated solution include a source of a gas stream having a contaminant, a source of a dilute solution having the contaminant, and an absorption chamber fluidly connected to the source of the gas stream and the source of the dilute solution. The source of the dilute solution can have a subsystem for removing contaminants from the gas stream, constructed and arranged to receive the gas stream or a liquid-enriched gas and produce the dilute solution.

A total recycling system of capture, conversion and utilization of flue gas from factory, power plant and refinery. A combined decontamination and dust removal unit removes dust and oxides; a capture subsystem captures CO.sub.2; a water unit recovers water; a hydrogen unit decomposes water into hydrogen and oxygen, and the oxygen is fed into a water gas unit to support combustion and extract hydrogen; a conversion subsystem enables a catalytic reaction between CO.sub.2 and hydrogen to convert into methanol and diol; an utilization subsystem makes a supercritical CO.sub.2 nanocellulose slurry, then to be blended with other material particles and extruded to form a supercritical CO.sub.2 nanocellulose foam; an energy subsystem is configured with solar energy, wind energy, and supplements energy by means of residual heat and hydrogen power generation; the system achieve carbon dioxide emission's reduction, conversion and utilization, thoroughly improve air pollution and green house effects.