文献类型：期刊文献

英文题名：Poly(ethyleneimine)-loaded silica monolith with a hierarchical pore structure for H2S adsorptive removal

作者：Chen, Qingjun[1]; Fan, Feichao[1]; Long, Donghui[1]; Liu, Xiaojun[1]; Liang, Xiaoyi[1]; Qiao, Wenming[1]; Ling, Licheng[1]

机构：[1] State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China

年份：2010

卷号：49

期号：22

起止页码：11408

外文期刊名：Industrial and Engineering Chemistry Research

收录：EI(收录号：20104713412061)

语种：英文

外文关键词：Scanning electron microscopy - Polymerization - Silica - Sorption - Transmission electron microscopy - Temperature

摘要：Poly(ethyleneimine) (PEI) loaded hierarchical porous silica monolith has been developed as a recycle H2S sorbent at low temperature. The sorbent was characterized by N2 adsorption, scanning electron microscope, transmission electron microscope, Fourier transform infrared spectra, and activity tests. The effects of the amount of PEI loading, the operating temperature, and the PEI polymerization degree on H2S removal were studied. The sorbent demonstrated a large H2S breakthrough capacity of 1.27 mmol of H2S/(g of sorbent) at 22 °C, which is about 60% larger than that of PEI-loaded SBA-15 or MCM-41 sorbent. The optimal PEI loading is 65 wt %, and the most ideal PEI molecular weight is 600. As the decrease of the temperature, the sorption performance of the sorbent increases greatly. There are two important factors affecting the performance of H2S sorption: the amount of available PEI in the sorbent and the interaction between H2S and amine functional groups of PEI. In addition, the developed sorbent can be regenerated easily at 75 °C, and it exhibits excellent regenerability and stability. These results indicate that PEI-loaded hierarchical porous silica sorbent will be promising for removing H2S in the future. ? 2010 American Chemical Society.