Study on the preparation of amine-modified silicate MCM-41 adsorbent and its H2S removal performance

IF 2.1 4区 化学 Q3 CHEMISTRY, PHYSICAL
J. Zhang, Hua Song, Yanguang Chen, Tianzhen Hao, Feng Li, Dan-dan Yuan, Xueqin Wang, Liang Zhao, Jinsen Gao
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引用次数: 3

Abstract

A series of APTMS ((3-aminopropyl)trimethoxysilane)-modified silicate MCM-41 adsorbents (x-APTMS/MCM-41, x is the volume of APTMS per 1 g of silicate MCM-41) with different APTMS contents was prepared, and the effects of APTMS content on the desulfurization performance of the APTMS/MCM-41 adsorbents were studied in a fixed adsorption bed using H2S and N2 mixture as a model gas. The as-prepared adsorbents were characterized by X-ray diffraction analysis, N2 adsorption–desorption, Fourier transform infrared spectroscopy, transmission electron microscopy, scanning electron microscopy, and energy-dispersive spectroscopy. The results showed that all the APTMS-modified x-APTMS/MCM-41 adsorbents retained the mesoporous silica structure of MCM-41. The Brunauer–Emmett–Teller-specific surface area of x-APTMS/MCM-41 increased slightly with increasing x at first and then decreased with further increasing APTMS content. The H2S removal performances of x-APTMS/MCM-41 adsorbents decreased in the order 0.6-APTMS/MCM-41 > 0.7-APTMS/MCM-41 > 0.5-APTMS/MCM-41 > 0.4-APTMS/MCM-41 > 0.8-APTMS/MCM-41. At x = 0.6, the maximum H2S removal rate of 54.2% and H2S saturated capacity of 134.4 mg g−1 were observed. The regeneration experiment of 0.6-APTMS/MCM-41 adsorbent after three times regeneration at 423 K for 3 h in nitrogen confirmed that it possessed a good regenerability.
胺改性硅酸盐MCM-41吸附剂的制备及其去除H2S性能研究
制备了一系列不同APTMS含量的APTMS((3-氨基丙基)三甲氧基硅烷)改性硅酸盐MCM-41吸附剂(x-APTMS/MCM-41, x为每g硅酸盐MCM-41中APTMS的体积),并在固定吸附床上以H2S和N2混合气为模型气,研究了APTMS含量对APTMS/MCM-41吸附剂脱硫性能的影响。采用x射线衍射分析、N2吸附-解吸、傅里叶红外光谱、透射电镜、扫描电镜和能量色散光谱对所制备的吸附剂进行了表征。结果表明,所有aptms修饰的x-APTMS/MCM-41吸附剂都保留了MCM-41的介孔二氧化硅结构。x-APTMS/MCM-41的brunauer - emmet - teller比表面积先随x的增加略有增加,后随APTMS含量的进一步增加而减小。x-APTMS/MCM-41吸附剂对H2S的去除效果依次为:0.6-APTMS/MCM-41 > 0.7-APTMS/MCM-41 > 0.5-APTMS/MCM-41 > 0.4-APTMS/MCM-41 > 0.8-APTMS/MCM-41。在x = 0.6时,H2S去除率最高可达54.2%,H2S饱和容量为134.4 mg g−1。对0.6-APTMS/MCM-41吸附剂在423 K条件下进行3次氮气再生实验,证实其具有良好的可再生性。
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来源期刊
CiteScore
2.10
自引率
0.00%
发文量
5
审稿时长
2.3 months
期刊介绍: The journal covers the fields of kinetics and mechanisms of chemical processes in the gas phase and solution of both simple and complex systems.
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