在模拟流化床燃烧（FBC）条件的加压热重分析仪（TGA）中对二氧化碳和二氧化硫进行顺序捕获。

Sequential capture of CO2 and SO2 in a pressurized TGA simulating FBC conditions.

作者信息

Sun Ping, Grace John R, Lim C Jim, Anthony Edward J

机构信息

Department of Chemical and Biological Engineering, University of British Columbia, Vancouver, Canada.

出版信息

Environ Sci Technol. 2007 Apr 15;41(8):2943-9. doi: 10.1021/es062445e.

DOI:10.1021/es062445e

PMID:17533862

Abstract

Four FBC-based processes were investigated as possible means of sequentially capturing SO2 and CO2. Sorbent performance is the key to their technical feasibility. Two sorbents (a limestone and a dolomite) were tested in a pressurized thermogravimetric analyzer (PTGA). The sorbent behaviors were explained based on complex interaction between carbonation, sulfation, and direct sulfation. The best option involved using limestone or dolomite as a SO2-sorbent in a FBC combustor following cyclic CO2 capture. Highly sintered limestone is a good sorbent for SO2 because of the generation of macropores during calcination/carbonation cycling.

摘要

研究了四种基于流化床燃烧（FBC）的工艺，作为依次捕集二氧化硫（SO₂）和二氧化碳（CO₂）的可能方法。吸附剂性能是其技术可行性的关键。在加压热重分析仪（PTGA）中测试了两种吸附剂（一种石灰石和一种白云石）。基于碳酸化、硫酸化和直接硫酸化之间的复杂相互作用解释了吸附剂的行为。最佳选择是在循环捕集CO₂之后，在FBC燃烧器中使用石灰石或白云石作为SO₂吸附剂。由于在煅烧/碳酸化循环过程中产生大孔，高度烧结的石灰石是一种很好的SO₂吸附剂。