煅烧沸石咪唑骨架吸附烟气CO_(2)促进节旋藻生长固碳  

Improved Carbon Fixation of Arthrospira Platensis by Calcinated ZIF-8 as CO_(2)Adsorbents

作　　者：朱颜霞 张泽 程军[1] 徐晓丹 杨卫娟[1] ZHU Yanxia;ZHANG Ze;CHENG Jun;XU Xiaodan;YANG Weijuan(State Key Laboratory of Clean Energy Utilization(Zhejiang University),Hangzhou 310027,Zhejiang Province,China;Shanghai Institute of Space Propulsion,Minhang District,Shanghai 201112,China)

机构地区：[1]能源清洁利用国家重点实验室(浙江大学),浙江省杭州市310027 [2]上海空间推进研究所,上海市闵行区201112

出　　处：《中国电机工程学报》2021年第4期1242-1249,共8页Proceedings of the CSEE

基　　金：国家重点研发项目(2016YFB0601003);浙江省重点研发项目(2020C04006)。

摘　　要：利用藻类生物捕集CO_(2)是一种很有前景的减排烟气CO_(2)的方法,但是烟气CO_(2)在藻液中停留时间短,向溶解无机碳的转化困难,限制了藻细胞的生长固碳。通过煅烧不同时间的锌沸石咪唑骨架来制备CO_(2)吸附剂,利用不饱和金属活性位点吸附CO_(2)并促进CO_(2)向HCOO_(3)^(-)的转化,为藻细胞的生长固碳提供充足的溶解无机碳。结果表明:煅烧6h得到的吸附剂拥有最大的比表面积和孔容积有利于CO_(2)吸附和转化,可提高藻液中HCOO_(3)^(-)浓度55.7%,使得钝顶节旋藻的光能利用效率在99.99%煤化工烟气CO_(2)条件下增加了2.43倍,培养时间从7天缩短至5天,生物质产量提高了74.7%,CO_(2)固定速率提高了93.7%,为微藻减排烟气CO_(2)提供了新思路。The use of photosynthetic microorganisms to capture CO_(2)is a promising method for reducing CO_(2)emissions.However,the short residence time of CO_(2)in culture medium and the difficulty of conversion into dissolved inorganic carbon limit the growth and carbon fixation of algae cells.In this study,the CO_(2)adsorbent was prepared by calcining the zeolitic imidazolate framework(ZIF-8)for various time.Flue gas CO_(2)from coal-chemical industry could be adsorbed on the unsaturated metal sites and converted into HCOO_(3)^(-),providing sufficient carbon source for the growth of cells.The CO_(2)adsorbent obtained by calcining for 6 h performed best due to the largest specific surface area and pore volume,which were conducive to the adsorption and conversion of CO_(2).The HCOO_(3)^(-)concentration in culture medium increased by 55.7%,resulting in a 2.43-fold increase in the light energy utilization efficiency of Arthrospira platensis under 99.99%CO_(2)conditions.The cultivation time was shortened from 7 days to 5 days,and finally the biomass yield and the CO_(2)fixation rate were enhanced by 74.7%and 93.7%,respectively.

关 键 词：钝顶节旋藻 煤化工烟气 沸石咪唑酯骨架 CO_(2)吸附剂 溶解无机碳 

分 类 号：TK6[动力工程及工程热物理—生物能]