公开(公告)号：US20250041789A1

公开(公告)日：2025-02-06

申请号：US18715978

申请日：2022-12-02

Applicant: Michigan Technological University

Inventor： Surendra Komar KAWATRA ,  Sriram VALLURI

IPC: B01D53/14 ,  B01D53/60 ,  B01D53/62

Abstract: An absorption column for the simultaneous capture of the flue gases CO2, NOx and SOx, the absorption column pertaining to a single wet scrubbing absorption column at alkaline pH conditions. In some aspects, the efficacy of the single stage absorption column for the simultaneous capture of the flue gases CO2, NOx and SOx being at least 99% for CO2, at least 30% for NO and at least 95% for SO2. The single stage absorption column can have a sodium carbonate solution. The sodium carbonate solution can be enhanced by one or more oxidants as rate promoters, including H2O2, NaOCl and mixtures thereof.

公开(公告)号：US20250135393A1

公开(公告)日：2025-05-01

申请号：US18833701

申请日：2023-01-26

Applicant: Michigan Technological University

Inventor： Surendra Komar KAWATRA ,  Sriram VALLURI

IPC: B01D53/14 ,  B01D53/62 ,  B01D53/78

Abstract: Sodium carbonate solutions utilized for CO2 absorption of a gaseous feedstock, such as a flue gas, can be enhanced by a frothing agent as an additive, particularly polyglycol ether frothers. The presence of the frothing agent as an additive significantly increases the absorption rate of a sodium carbonate slurry solution to generate sodium bicarbonate. The frothing agent has minimal or no effect on the energy required for reagent regeneration, such that the forther-modified sodium carbonate solution based system is economically viable and environmentally friendly.

公开(公告)号：US20250128204A1

公开(公告)日：2025-04-24

申请号：US18834330

申请日：2023-01-30

Applicant: Michigan Technological University

Inventor： Surendra Komar KAWATRA ,  Sriram VALLURI

IPC: B01D53/62 ,  B01D53/78 ,  B01D53/96

Abstract: A system and process for the capture of carbon dioxide from a gaseous feedstock, regenerating carbon dioxide in a purified form, and regenerating reagents, wherein the reagent regeneration having reduced energy consumption in relation to carbon dioxide capture. Carbon dioxide captured by a slurry scrubbing solution producing a resultant product that can be reacted with an acid reagent to form the regenerated carbon dioxide and a resultant salt solution. Electrodialysis with bipolar membrane separation employed on the resultant salt solution to form regenerated acid and regenerated base. The regenerated base recirculated as the scrubbing solution to capture additional carbon dioxide, and the regenerated acid recirculated for additional acid reaction with additional resultant product, such that the system and process can continuously capture and form regenerated carbon dioxide in a purified form compared to the carbon dioxide of the gaseous feedstock.