Feasibility analysis of SO_2 absorption using a hydrophilic ceramic membrane contactor  

作　　者：Xingyin Gao Minghui Qiu Kaiyun Fu Peng Xu Xiangli Kong Xianfu Chen Yiqun Fan 

机构地区：[1]State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University

出　　处：《Chinese Journal of Chemical Engineering》2018年第10期2139-2147,共9页中国化学工程学报（英文版）

基　　金：Supported by the National Key R&D Plan(2016YFC0205700);the National Natural Science Foundation of China(91534108,21506093,21706114);the Natural Science Foundation of Jiangsu Province(BK20150947,BK20160979);the National High Technology Research and Development Program of China(2012AA03A606);the Project of Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD)

摘　　要：Hydrophilic ceramic membranes would be potential candidates for membrane gas absorption if they could be applied to appropriate separation processes.This study highlights a novel concept for the practical implementation of SO_2 absorption in hydrophilic ceramic membrane that exhibits outstanding thermal and mechanical stabilities.With this aim,we investigated experimentally the performance of SO_2 absorption into aqueous sodium hydroxide (NaOH) solution in a hydrophilic alumina (Al_2O_3) membrane contactor in terms of SO_2 removal efficiency and SO_2 mass transfer flux,and compared the performance with that in a hydrophobic one.A series of experiments were performed at various conditions over a NaOH concentration range of 0–1.0 mol·L^(-1),a liquid flow rate range of 30–180 ml·min^(-1),a gas flow rate range of 120–1000 ml·min^(-1),an inlet SO_2 concentration range of 400–2000μl·L^(-1),and a temperature range of 10–35°C.It was found that the hydrophilic membrane was more competitive when using a NaOH concentration higher than 0.2 mol·L^(-1).Furthermore,it can be inferred that the hydrophilicα-Al_2O_3 membrane exhibited exceptional long-term stability under 480 h continuous operation.Hydrophilic ceramic membranes would be potential candidates for membrane gas absorption if they could be applied to appropriate separation processes.This study highlights a novel concept for the practical implementation of SO2 absorption in hydrophilic ceramic membrane that exhibits outstanding thermal and mechanical stabilities.With this aim,we investigated experimentally the performance of SO2 absorption into aqueous sodium hydroxide （NaOH） solution in a hydrophilic alumina （Al2O3） membrane contactor in terms of SO2 removal efficiency and SO2 mass transfer flux,and compared the performance with that in a hydrophobic one.A series of experiments were performed at various conditions over a NaOH concentration range of 0–1.0 mol·L-1,a liquid flow rate range of 30–180 ml·min-1,a gas flow rate range of 120–1000 ml·min-1,an inlet SO2 concentration range of 400–2000μl·L-1,and a temperature range of 10–35°C.It was found that the hydrophilic membrane was more competitive when using a NaOH concentration higher than 0.2 mol·L-1.Furthermore,it can be inferred that the hydrophilicα-Al2O3 membrane exhibited exceptional long-term stability under 480 h continuous operation.

关 键 词：ABSORPTION Membrane contactor Ceramic membrane HYDROPHILIC DESULFURIZATION 

分 类 号：TQ028.8[化学工程]