改性钛管基复合吸附剂及其在油田伴生气中CO_2脱除的应用  

Modified Composite Adsorbents based on Titanate Nanotubes and its Application on CO_2 Adsorption from Oilfield Associated Gas

作　　者：刘洁[1,2] 赵代文 陈宁华 叶芝祥 徐成华[1,2] 杨云 

机构地区：[1]成都信息工程大学资源环境学院,成都610225 [2]大气环境模拟与污染控制省高校重点实验室,成都610207 [3]四川天一科技股份有限公司,成都610225

出　　处：《四川环境》2017年第5期42-47,共6页Sichuan Environment

基　　金：四川省科技支撑计划(2015GZ0173)

摘　　要：通过湿式浸渍法制备了胺改性复合吸附剂用于油田伴生气中的CO_2捕集回收。采用物理吸附仪(BET-BJH)、热重分析仪(TG)考察了复合吸附剂的微观结构和热稳定性;通过等温吸附曲线研究了胺改性钛管对CO_2的吸附特性和对CH4/CO_2的吸附选择性。实验结果表明,胺改性复合吸附剂适用于150℃下的操作环境,在75℃时对CO_2的吸附容量可高达110mg/g;其对CO_2的吸附符合准二级动力学模型。40PEI/HTO对CO_2亲和性强,是分离CO_2/CH4的优异吸附剂。Amine modified composite adsorbent based on titanate nanotubes has been prepared through wet impregnation method for CO2 capture from the oilfield associated gas. Its microstructures and thermal stability were investigated by physical adsorption instrument（ BET-BJH） and thermal gravimetric analyzer（ TG）. Through adsorption isothermal curve,the CO2 adsorption properties and CH4/CO2 adsorption selectivity were studied. The results indicated that amine modified composite adsorbent works under 150℃,at the temperature of 75℃,the CO2 adsorption capacity can reach 110 mg/g,and the adsorption fitted for pseudo-second order model. 40 PEI/HTO has strong CO2 affinity,which is an excellent adsorbent to separate CO2/CH4.

关 键 词：油田伴生气 钛管基复合吸附剂 CO2吸附 选择性 

分 类 号：X701[环境科学与工程—环境工程]