摘要
构建了新型修饰生物阴极微生物电解池(MEC),考察了修饰生物阴极对MEC最大电流密度、库伦效率以及有机物产量的影响。结果表明,在外加电势为-0. 7 V时,反应周期结束后,修饰组最大电流密度约为2. 78 A/m2,较对照组(约1. 97 A/m2)提高了41. 1%;修饰组最大库伦效率达到85. 99%,是未修饰(77. 18%)的1. 1倍。生物阴极修饰后极大地提高了CO_2的还原效率及有机物的合成产量,甲醇和乙酸的最大积累量达到4. 627,8. 027 mmol/L,是对照组(甲醇3. 574 mmol/L,乙酸5. 344 mmol/L)的1. 29倍和1. 50倍,氢气最大积累量为48. 5 m L。结果表明,生物阴极经修饰后可显著促进CO_2的还原并提高库伦效率和合成产物的产量。
A new modified biological cathode microbial cell(MEC)was constructed.The effects of modified biological cathodes on MEC maximum current density,coulombic efficiency and organic yield were investigated.The results showed that the maximum current density of modified group was about 2.78 A/m 2 at the applied potential of-0.7 V,which was 41.1%higher than that of the control group(about 1.97 A/m 2).The maximum coulombic efficiency 85.99%,which is 1.1 times of unmodified(77.18%).After the modification of biocathode,the reduction efficiency of CO 2 and the yield of organic compounds were greatly increased.The maximum accumulation of methanol and acetic acid reached 4.627 and 8.027 mmol/L,which were the control group(methanol 3.574 mmol/L,acetic acid 5.344 mmol/L)of 1.29 times and 1.50 times the maximum hydrogen accumulation of 48.5 mL.The results show that the modified biocathode can significantly promote the reduction of CO 2 and improve the efficiency of Coulomb and the yield of the synthesized product.
作者
陈小进
王黎
张鹏程
李洋洋
胡宁
CHEN Xiao-jin;WANG Li;ZHANG Peng-cheng;LI Yang-yang;HU Ning(School of Resource and Environment Engineering,Wuhan University of Science and Technology,Wuhan 430081,China)
出处
《应用化工》
CAS
CSCD
北大核心
2018年第9期1816-1820,共5页
Applied Chemical Industry
基金
国家自然科学基金项目资助(51574185)
