固定化碳酸酐酶催化吸收模拟烟气中CO2实验研究

doi:10.16085/j.issn.1000-6613.2017-0012

化工进展 ›› 2017, Vol. 36 ›› Issue (09): 3502-3507.DOI: 10.16085/j.issn.1000-6613.2017-0012

固定化碳酸酐酶催化吸收模拟烟气中CO₂实验研究

李娟¹, 张琳¹, 孙莹¹, 杨林军^1,2

1 东南大学能源热转换及其过程测控教育部重点实验室, 江苏南京 210096;
2 中国矿业大学江苏省煤基CO₂捕集与地质封存重点实验室, 江苏徐州 221008

收稿日期:2017-01-04 修回日期:2017-05-04 出版日期:2017-09-05 发布日期:2017-09-05
通讯作者: 杨林军,博士,教授,主要从事PM_2.5、脱硫、脱硝、CO₂捕集方面的研究。
作者简介:李娟(1990-),女,硕士,从事CO₂捕集和封存研究。E-mail:1527449899@qq.com
基金资助:
高等学校博士学科点专项科研基金（20130092110005）、江苏省煤基CO₂捕集与地质储存重点实验室（2016年）开放基金（2016A05）、国家自然科学基金（51176034）及东南大学优秀博士学位论文基金（YBJJ1508）项目。

Experimental studies on catalytic absorption of CO₂ in simulated flue gas by immobilized carbonic anhydrase

LI Juan¹, ZHANG Lin¹, SUN Ying¹, YANG Linjun^1,2

1 Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, Southeast University, Nanjing 210096, Jiangsu, China;
2 Key Laboratory of Coal-based CO₂ Capture and Geological Storage, China University of Mining and Technology, Xuzhou 221008, Jiangsu, China

Received:2017-01-04 Revised:2017-05-04 Online:2017-09-05 Published:2017-09-05

摘要/Abstract

摘要： 利用表面羧基化四氧化三铁和戊二醛交联法实现碳酸酐酶的固定，对比考察了游离态碳酸酐酶和固定化碳酸酐酶对CO₂催化吸收效果的影响；还自行设计了填料塔反应装置，在填料塔式反应器中进行了固定化碳酸酐酶催化吸收CO₂实验，考察了操作条件及共存气体SO₂对固定化碳酸酐酶催化吸收CO₂性能的影响。结果表明，游离态碳酸酐酶和固定化碳酸酐酶可缩短CO₂达到饱和浓度所需的时间；同时，得到最优的操作条件为：液气比为28L/m³，气体流速为25.5cm/min，单位塔体积加酶量为600mg/L（载酶量2mg/L），吸收液温度为35℃；固定化碳酸酐酶经连续5h催化吸收CO₂后，CO₂的去除效率仍可维持在30%以上；此外，SO₂的存在不利于固定化碳酸酐酶对CO₂的催化吸收。

关键词: 固定化酶, 二氧化碳, 催化吸收, 填料塔反应器

Abstract: The carbonic anhydrase was immobilized by the carboxylated Fe₃O₄ and glut-aldehyde cross-linking method in this study. The effects of the free carbonic anhydrase and immobilized carbonic anhydrase on the CO₂ absorption were compared. A packed tower reactor was designed. The effect of the operating conditions and SO₂ on the performance of CO₂ catalytic absorption with the immobilized carbonic anhydrase was investigated in the packed tower reactor. The results showed that the free enzyme and immobilized enzyme could shorten the time of CO₂ reaching saturation concentration. The optimal operating conditions,such as the ratio of liquid to gas,the gas flow rate,enzyme dosage of the unit tower volume,and absorption liquid temperature,were 28L/m³,25.5cm/min,600mg/L,and 35℃,respectively. The CO₂ removal efficiency could still reach more than 30%,after catalytic absorption with the immobilized enzyme for 5h. The existence of SO₂ had negative effect on the CO₂ catalytic absorption.

Key words: immobilized enzyme, carbon dioxide (CO₂), catalytic absorption, packed tower reactor

中图分类号:

X511

李娟, 张琳, 孙莹, 杨林军. 固定化碳酸酐酶催化吸收模拟烟气中CO₂实验研究[J]. 化工进展, 2017, 36(09): 3502-3507.

LI Juan, ZHANG Lin, SUN Ying, YANG Linjun. Experimental studies on catalytic absorption of CO₂ in simulated flue gas by immobilized carbonic anhydrase[J]. Chemical Industry and Engineering Progress, 2017, 36(09): 3502-3507.

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固定化碳酸酐酶催化吸收模拟烟气中CO₂实验研究

Experimental studies on catalytic absorption of CO₂ in simulated flue gas by immobilized carbonic anhydrase

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