NO adsorption and temperature programmed desorption on K_2CO_3 modified activated carbons

作     者：YANG Dai-jun MA Xiao-wei LV Hong LI Bing ZHANG Cun-man 杨代军;马晓伟;吕洪;李冰;张存满

作者机构：School of Automotive Studies Tongji University Clean Energy Automotive Engineering Center Tongji University Department of Physics and Atmospheric Science Dalhousie University 

出 版 物：《Journal of Central South University》 (中南大学学报（英文版）)

年 卷 期：2018年第25卷第10期

页      面：2339-2348页

核心收录：

学科分类：08[工学] 0807[工学-动力工程及工程热物理] 

基　　金：Project(2018YFB0105303)supported by the Ministry of Science and Technology of China Project(17DZ1200702)supported by the Shanghai Science and Technology Committee,China 

主　　题：activated carbon potassium carbonate modification NO adsorption temperature programmed desorption 

摘      要：Fuel cell stacks as the automotive power source can be severely poisoned by a trace amount of NOx in atmosphere,which makes it necessary to provide clean air for fuel cell *** this work,activating commercial activated carbons with K2CO3 for the large enhancement of NO capture was studied.K2CO3 modified activated carbons(K2CO3 ACs)were prepared by impregnating activate carbons in K2CO3 solution under ultrasound treatment,followed by temperature programmed baking at 800 *** dynamic NO flow tests on K2CO3 ACs at room temperature indicated that NO adsorption capacity reached the maximum(96 mg/g)when K2CO3 loading was 19.5 wt%,which corresponded to a specific surface area of 1196.1 m2/g and total pore volume of 0.70 cm3/*** ten-fold enhancement of NO adsorption on K2CO3 ACs compared to the unimpregnated activated carbon was mainly attributed to the formation of potassium nitrite,which was confirmed by FTIR and temperature programmed desorption *** tests of NO adsorption on the optimum sample revealed that 76%of the NO adsorption capacity could be remained after the fourth cycle.