摘要
为了减少温室气体CO2的排放,采用氨水直接鼓泡法吸收模拟烟道气中的CO2,生成碳酸氢铵,实现脱除CO2的目的。通过实验考察氨水浓度、气体中CO2含量和气体流量等因素对CO2脱除率的影响。结果表明:增大氨水浓度对吸收过程有利,但尾气中氨的含量增加,适宜的氨水质量分数为8%～10%;气体流量和气体中CO2含量的增加不利于CO2的吸收,综合考虑,适宜的入口气体流量为0.6L/min、CO2体积分数为10%;在氨水中添加少量的沸石可明显提高CO2的脱除率;反应产物的主要成分为碳酸氢铵。
To reduce the emission of CO2,an approach of absorbing CO2 from simulated flue gas by aqueous ammonia to generate ammonium bicarbonate was studied.The effect of ammonia concentration,CO2 content in flue gas and gas flow rate on the removal rate of CO2 was investigated.Results showed that with the increase of ammonia concentration in solution,the absorption of CO2 enhanced,but the content of ammonia in the exhaust gas increased as well,so the optimum mass fraction of ammonia in solution was 8%—10%;the increase of gas flow rate and CO2 content in flue gas had negative effect on the absorption of CO2,the appropriate flow rate of inlet gas was 0.6 L/min and the volume fraction of CO2 was 10%.Adding some zeolite particles in aqueous ammonia could improve the CO2 removal rate significantly.It was found that the reaction products were mainly ammonium bicarbonate.
出处
《石油炼制与化工》
CAS
CSCD
北大核心
2012年第6期80-83,共4页
Petroleum Processing and Petrochemicals
基金
国家自然科学基金资助(51172086)
淮北师范大学青年科学基金项目(700288)
关键词
二氧化碳
氨水
鼓泡
碳酸氢铵
carbon dioxide
aqueous ammonia
bubble
ammonium bicarbonate
