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US 2026/0166475 A1Published application
Non-aqueous solvent formulations for acid gas capture
AssigneeResearch Triangle Institute
InventorsMarty Lail, Lucas Cody, Moumita Bhattacharya, Daniel Mogollon, Jak Tanthana
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Abstract
A solvent system formulation comprising a diluent component and a nitrogenous base component for the removal of acid gases from mixed gas streams is provided. Also provided is a process for removing acid gases from mixed gas streams using the disclosed solvent system formulation. The solvent system formulation may be utilized within a gas processing system.
Claims20
A solvent system comprising a solution formed of:
- a nitrogenous base component, comprising a nitrogenous base having a hydrogen atom leaving group and a vapor pressure of less than 0.1 kPa at 25° C. and 101 kPa;
- and
- a diluent component,
- wherein the nitrogenous base has a structure such that it reacts with an acidic gas so as to form a carbamate salt or a heteroatom analogue of a carbamate salt without any substantial formation of a carbonate ester or a heteroatom analogue of a carbonate ester, and
- wherein no substantial amount of precipitate is formed upon combination of CO2 with the solvent system.
2 more elements
A solvent system comprising a solution formed of:
- a nitrogenous base component A selected from 1-(naphthalen-1-yl)ethan-1-amine (A1), N-methyl-1-(naphthalen-1-yl)methanamine (A2), 1,2,3,4-tetrahydroisoquinoline (A4), and 2-(benzylamino)ethan-1-ol (A9);
- and
- a diluent component D selected from 2-[2-(2-methoxyethoxy)ethoxy]ethan-1-ol (D3), 2-[2-(2-butoxyethoxy)ethoxy]ethan-1-ol (D5), 1-({1-[(1-methoxypropan-2-yl)oxy]propan-2-yl}oxy)propan-2-ol (D6), a mixture of ethers (D9), 3-[3-(3-butyoxypropoxy)propoxy]propan-1-ol (D10), tripropylene glycol methyl ether (D11), and 5,8,11,14-tetraoxaoctadecane (D20).
A solvent system comprising a solution formed of:
- two different nitrogenous base components AA and AB,
- wherein AA is selected from N-methyl-1-(naphthalen-1-yl)methanamine (A2) and 2-(benzylamino)ethan-1-ol (A9) and
- wherein AB is selected from 1-(naphthalen-1-yl)ethan-1-amine (A1), N-methyl-1-(naphthalen-1-yl)methanamine (A2), 1,2,3,4-tetrahydroisoquinoline (A4), A5, and 2-(benzylamino)ethan-1-ol (A9);
- and
- a diluent component D selected from 2-[2-(2-methoxyethoxy)ethoxy]ethan-1-ol (D3), 2-[2-(2-butoxyethoxy)ethoxy]ethan-1-ol (D5), 1-({1-[(1-methoxypropan-2-yl)oxy]propan-2-yl}oxy)propan-2-ol (D6), a mixture of ethers (D9), 3-[3-(3-butyoxypropoxy)propoxy]propan-1-ol (D10), tripropylene glycol methyl ether (D11), 1-[(1-propoxypropan-2-yl)oxy]propan-2-ol (D12), 1-[(1-butoxypropan-2-yl)oxy]propan-2-ol (D13), 2-butoxyethyl acetate (D15), 2-[(2-ethylhexyl)oxy]ethan-1-ol (D17), polyethylene glycol phenyl ether (D18), and 2-[2-(hexyloxy)ethoxy]ethan-1-ol (D19),
- wherein a combination of A2, A5, and D3 contains less than 78% by weight of A2 and/or greater than 12% A5 by weight;
- wherein a combination of A2, A5, and D5 contains less than 80% A2 by weight and/or greater than 8% A5 by weight;
- wherein a combination of A2, A5, and D6 contains less than 78% A2 by weight and/or greater than 10% A5 by weight;
- wherein a combination of A2, A5, and D9 contains a higher content of A2 than A5 by weight and contains less than 75% A2 by weight and/or greater than 10% A5 by weight;
- wherein a combination of A2, A5, and D10 contains less than 70% A2 by weight and/or greater than 15% A5 by weight;
- wherein a combination of A2, A5, and D11 contains less than 80% A2 by weight and/or greater than 10% A5 by weight;
- and
- wherein a combination of A2, A5, and D13 contains less than 70% A2 by weight and/or more than 15% A5 by weight.
10 more elements
Dependencies are inferred from the claim text.