In:
Progress in Reaction Kinetics and Mechanism, SAGE Publications, Vol. 45 ( 2020-01), p. 146867831982590-
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 H 2 S and N 2 mixture as a model gas. The as-prepared adsorbents were characterized by X-ray diffraction analysis, N 2 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 H 2 S 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 H 2 S removal rate of 54.2% and H 2 S 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.
Type of Medium:
Online Resource
ISSN:
1468-6783
,
1471-406X
DOI:
10.1177/1468678319825900
Language:
English
Publisher:
SAGE Publications
Publication Date:
2020
detail.hit.zdb_id:
2018085-8
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