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

• 资源与环境化工 • 上一篇    下一篇

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. 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PM2.5、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 Linjun1,2   

  1. 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: 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

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