High-temperature CO_(2) sorbents with citrate and stearate intercalated Ca-Al hydrotalcite-like as precursor  

作　　者：Tao Jiang Fei Xiao Yujun Zhao Shengping Wang Xinbin Ma 

机构地区：[1]Key Laboratory for Green Chemical Technology,School of Chemical Engineering and Technology,Collaborative Innovation Center of Chemical Science and Engineering(Tianjin),Tianjin University,Tianjin 300072,China

出　　处：《Chinese Journal of Chemical Engineering》2022年第10期177-184,共8页中国化学工程学报（英文版）

基　　金：Financial support by National Key Research and Development Program of China(2017YFB0603300);the Program for New Century Excellent Talents in University(NCET-13-0411);the Program of Introducing Talents of Discipline to Universities(B06006)。

摘　　要：CO_(2),one of the main components of greenhouse gases,increased rapidly because of the growing use of fossil fuels.And CaO sorbents possess the capability to be used in capture of CO_(2) at high temperature.In the work,Ca-Al complex oxides derived from citrate and stearate intercalated layered double hydroxides were fabricated and their CO_(2) adsorption capacity was compared with that from CO_(3)^(2-)intercalated layered double hydroxides.The results presented that the sorbents(Ca/Al=5)with Ca-Al-citrate layered double hydroxides as precursors performed best and displayed remarkable CO_(2) capture capacity of 52.0%(mass)at the carbonization temperature of 600℃without distinct recession during cycling adsorption/desorption tests.The excellent CO_(2) adsorption capacity of the sorbent was ascribed to its smaller crystallite size of calcinated particles,optimized pore size distribution as well as homogeneous distributed Ca and Al in the sorbent.

关 键 词：Layered doublehydroxides CO_(2)capture CaO-based Organic ions 

分 类 号：X701[环境科学与工程—环境工程] TQ028.17[化学工程]