密闭环境内固体吸收剂循环净化CO_2反应特性  

Reaction characteristics of CO_2 circulation purification by solid absorbents in closed environments

作　　者：刘应书[1,2] 贾彦翔[1] 刘文海[1] 霍婧[1] 

机构地区：[1]北京科技大学机械工程学院,北京100083 [2]北京科技大学钢铁冶金新技术国家重点实验室,北京100083

出　　处：《北京科技大学学报》2014年第3期359-365,共7页Journal of University of Science and Technology Beijing

基　　金：中央高校基本科研业务费专项资金资助项目(FRF--SD--12--013A)

摘　　要：选取LiOH、Ca(OH)2和钠石灰三种常用固体化学吸收剂,在密闭环境CO2循环净化模拟装置上开展了CO2循环净化实验研究.三种吸收剂均有吸收CO2的作用,且均存在一个较优空速值,分别为110400、38700和40500 h-1,在该空速值条件下将体积分数2%左右的CO2吸收至0.03%左右所需反应时间最短,反应速率最大.通过函数拟合和数学分析,得出实验条件下三种吸收剂反应速率与CO2质量浓度的关系式以及最大反应速率的排列次序.进一步的分析表明,三种吸收剂在较优空速值条件下的CO2吸收速率均能达到相关标准的要求,可以实际应用于密闭环境内CO2净化,且密闭环境中CO2体积分数理论上会在一定的中间值附近波动.By using a simulation device of CO2 circulation purification in a closed environment, CO2 circulation purification experi-ments were carried out with three kinds of solid chemical absorbents, LiOH, Ca（ OH） 2 and soda lime. Experimental results show that all the absorbents can absorb CO2 , and there are the optimal space velocity values for the three absorbents, which are 110400, 38700, and 40500 h-1 , respectively. Under these space velocity value conditions, the reaction time is the shortest and the reaction rate is the fastest for absorbing the CO2 volume fraction of 2% to 0.03%. The relationships between reaction rate and CO2 mass concentration as well as the maximum reaction rate order of the three absorbents under experimental conditions were obtained by function fitting and mathematical analysis. Further analysis indicates that the CO2 absorption rates of the three absorbents under the optimal space velocity value conditions are able to meet the requirements of relevant standards for actual CO2 purification in closed environments, while the CO2 volume fraction would fluctuate around certain intermediate values in theory.

关 键 词：密闭环境 二氧化碳 吸收剂 空气净化 反应动力学 

分 类 号：TU834.8[建筑科学—供热、供燃气、通风及空调工程]