【摘要】 基于溶胶-凝胶法开发出一种新型CaO基吸收剂（Ca-Al-Fe）,考查了其焦油脱除及捕集CO₂的性能。结果表明:Ca-Al-Fe吸收剂的主要成分为CaO、Ca₁₂Al₁₄O₃₃、Fe₂O₃;Ca-Al-Fe吸收剂可在麦秆热解中捕集CO₂和减少焦油类物质的析出;与普通CaO相比,Ca-Al-Fe吸收剂循环捕集CO₂的性能显著提高;经过20个循环碳酸化-煅烧反应,Ca-Al-Fe的CO₂吸收量和CaO转化率降低较小,分别由0.42mg/mg、84%降低到0.34 mg/mg、67%,同时Ca-Al-Fe的机械强度显著提高;与已有研究相比,新型吸收剂在循环碳酸化性能方面具有优势。更多还原

【Abstract】 A CaO-based sorbent（Ca-Al-Fe）was newly developed using sol-gel method,of which the performance in tar removal and CO₂ capture was examined.Results show that the Ca-Al-Fe sorbent,with main components of CaO,Ca₁₂Al₁₄O₃₃ and Fe₂O₃,can capture the CO₂ and reduce the evolution of tar species in the pyrolysis of wheat straw.The performance of Ca-Al-Fe sorbent has been significantly improved in cyclic CO₂ capture,compared to ordinary CaO.After 20 cycles of " carbonation-calcination" reaction,the CO₂ capture capacity and CaO conversion rate of Ca-Al-Fe sorbent are slightly reduced,from 0.42 mg/mg and 84%to 0.34 mg/mg and 67%,accordingly,while its mechanical strength is remarkably improved.Compared with those sorbents mentioned in relevant literatures,the newly developed Ca-Al-Fe sorbent has better performance in cyclic carbonation.更多还原