Removal performance of Nitrogen, sulfur and chlorine pollutants during chemical looping combustion of textile dyeing sludge using red mud as an oxygen carrier
Chemical Engineering Journal, ISSN: 1385-8947, Vol: 498, Page: 155115
2024
- 4Citations
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- 1Mentions
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Most Recent News
Reports Outline Chemicals and Chemistry Findings from Chinese Academy of Sciences (Removal Performance of Nitrogen, Sulfur and Chlorine Pollutants During Chemical Looping Combustion of Textile Dyeing Sludge Using Red Mud As an Oxygen Carrier)
2024 OCT 21 (NewsRx) -- By a News Reporter-Staff News Editor at Chemicals & Chemistry Daily Daily -- A new study on Chemicals and Chemistry
Article Description
Textile dyeing sludge (TDS) is a solid waste produced by the textile industry, which contains a large number of N, S and Cl components. Direct heat treatment of TDS will cause a large number of N, S, Cl pollutants to be released. This study verified the possibility of chemical looping combustion (CLC) of TDS using alkaline WS900 red mud (RM) oxygen carrier, which is rich in Na/Ca, to remove N, S and Cl pollutants at the same time. Raising the reaction temperature in the range of 750–900 °C, prolonging the residence time and increasing the oxygen excess coefficient can promote the oxidation performance of WS900 to NO x precursor, while CO 2 atmosphere inhibits the oxidation ability. After 10 cycles of CLC, the Cl fixation rate of WS900 is still close to 100% and its S fixation rate is more than 97%. It can maintain more than 90% of carbon conversion and 86% of CO 2 selectivity. Compared with the pyrolysis condition, the removal rate of N pollutants is about 67%. Alkaline RM is also neutralized after absorbing acid gases during CLC, which is convenient for its further treatment and utilization.
Bibliographic Details
Elsevier BV
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