A system and a method for continuously separating carbon dioxide from gas mixtures, utilizing a continuous loop of porous monoliths which support a sorbent within its pores. Continuously exposing a portion of the continuous loop of monoliths to a flow of gas mixture containing a minor proportion of carbon dioxide, to adsorb carbon dioxide from the flow. The loop passes through a sealed regeneration and carbon dioxide capture assembly located astride a portion of the loop, and which is capable of sealingly containing a monolith in relative movement through the assembly. The assembly chamber comprises a plurality of separately sealed zones, including at least one zone for purging oxygen from the monoliths, -a subsequent zone for heating the monolith to release the adsorbed carbon dioxide, and another cooling zone for cooling the monolith prior to reentering the adsorption portion of the loop where it is exposed to oxygen.

Disclosed is a system and method for cooperatively treating water and gas to reduce pollutants and carbon emission. The system includes a flue gas pre-treatment unit, a wastewater pre-treatment unit, a gas-water cooperative cleaning unit, a remaining water treatment unit, and a circulating cooling evaporation unit.

Disclosed is a system and method related to removal of carbon from carbon dioxide via the use of plasma arc heating techniques. The method involves generating C atoms and H atoms from C.sub.xH.sub.y. The method involves generating graphite and H.sub.2 from the C atoms and H atoms, and extracting the graphite. The method involves quenching the H.sub.2 with C.sub.xH.sub.y. The method involves receiving, at a generator, the quenched the H.sub.2 and C.sub.xH.sub.y and generating electricity. The method involves generating a concentrated stream of H.sub.2 from the quenched H.sub.2 and C.sub.xH.sub.y. The method involves receiving CO.sub.2 and the concentrated stream of H.sub.2 and generating C, O, and H atoms. The method involves receiving the C, O, and H atoms and generating graphite, wherein the graphite is extracted. In the hydrocarbon C.sub.xH.sub.y: x is an integer 1, 2, 3, . . . , and y=2x+2.

An ocean alkalinity enhancement (OAE) system that reduces atmospheric CO.sub.2 and mitigates ocean acidification by electrochemically processing feedstock solution (e.g., seawater or brine) to generate an alkalinity product that is then supplied to the ocean. The OAE system includes a base-generating device and a control circuit disposed within a modular system housing deployed near a salt feedstock. The base-generating device (e.g., a bipolar electrodialysis (BPED) system) generates a base substance that is then used to generate the ocean alkalinity product. The control circuit controls the base-generating device such that the alkalinity product is supplied to the ocean only when (1) sufficient low/zero-carbon electricity is available, (2) it is safe to operate the base-generating device, and (3) supplying the alkalinity product will not endanger sea life. Modified BPED systems include features that facilitate autonomous system operations including enhanced maintenance cycle operations and a reduced reliance on external fresh water sources.

A method for producing hydrogen in a steam methane reformer with reduced carbon emissions that can include the steps of: heating a feed stream comprising methane in a first heat exchanger to produce a heated feed stream, wherein the heated feed stream is at a temperature above 500° C.; introducing the heated feed stream into a reaction zone under conditions effective for catalytic conversion of the heated feed stream to produce a reformed stream, wherein the reformed stream comprises hydrogen, carbon monoxide, and unreacted methane; introducing the reformed stream in the presence of steam to a shift conversion unit that is configured to produce a shifted gas stream comprising hydrogen and carbon dioxide; and purifying the shifted gas stream to produce a hydrogen product stream and a tail gas; wherein the conditions effective for catalytic conversion of the heated feed stream comprise providing heat to the reaction zone via combustion of a fuel and a hydrogen fuel stream in presence of an oxidizer, wherein the fuel comprises ammonia, wherein a flue gas is produced by the combustion of the fuel and the hydrogen fuel stream.

A process of removing methanol, CO.sub.2, or both from a hydrocarbon stream is described. The process uses an adsorbent comprising binderless type 3A zeolite. The adsorbent has high methanol removal capacity and low olefin co-adsorption capacity, as well as low reactivity in an olefin stream. This allows reduced adsorbent loading while maintaining downstream catalyst performance and product quality. The adsorbent comprises a type 3A zeolite comprising less than 5% of a binder and an ion exchange ratio of 30% to 70%. The adsorption process can obtain an outlet methanol content of 1 ppmw or less.

An apparatus includes a captured carbon dioxide input. The captured carbon dioxide input is coupled to receive captured carbon dioxide from a direct air capture system. The apparatus uses the captured carbon dioxide as a low global warming refrigerant to provide cooling functionality in automotive, commercial, and industrial applications, or other operations involving low global warming refrigerants. In various embodiments, the apparatus is a refrigeration apparatus or a heat pump apparatus. Low global warming carbon dioxide refrigerant is natural, non-toxic, non-flammable, and abundant when obtained from a direct air capture system. Moreover, carbon dioxide refrigerant has a high heat transfer coefficient and has a global warming potential (GWP) of one. Carbon dioxide refrigerant is a more sustainable and efficient coolant option than common refrigerants, such as R22, R152, R404a, and R1234yf refrigerants.

A blast furnace facility includes a process for capturing and sequestering CO2 generated from the facility process, producing hydrogen from the hot blast furnace gas, and using blast furnace gas as methanol feed. The CO2 rich streams from the facility may be sent to sequestration of some form via a sequestration compressor, thereby reducing the overall emissions from the facility. The other products generated by the facility are used as methanol feedstock and to produce hydrogen.

A blast furnace facility includes a process for capturing and sequestering CO2 generated from the facility process, generating hydrogen from hot blast furnace gas, and using blast furnace gas as methanol feed. The CO2 rich streams from the facility are sent to sequestration of some form via a sequestration compressor, thereby reducing the overall emissions from the facility. The other products generated by the facility are used as methanol feedstock and to produce hydrogen.

A natural gas pretreatment system includes a heat exchanger having a first inlet, a second inlet, a first outlet, and a second outlet. The first inlet receives a first pressurized gas stream having a first input temperature, and the second inlet receives a second pressurized gas stream having a second temperature. The second temperature is higher than the first temperature. The first outlet outputs the first gas stream; upon exiting the heat exchanger, the first gas stream has a first output temperature higher than the first input temperature. The second outlet outputs the second gas stream; upon exiting the heat exchanger, the second gas stream has a second output temperature lower than the second input temperature. The system further includes a pipeline network operable to receive the first pressurized gas stream.