ZnO/SBA-15 composites for mid-temperature removal of H2S: Synthesis, performance and regeneration studies

被引：70

作者：

Mureddu, M. ^{[1
,2
]}

Ferino, I. ^{[1
,2
]}

Rombi, E. ^{[1
,2
]}

Cutrufello, M. G. ^{[1
,2
]}

Deiana, P. ^{[3
]}

Ardu, A. ^{[1
,2
]}

Musinu, A. ^{[1
,2
]}

Piccaluga, G. ^{[1
,2
]}

Cannas, C. ^{[1
,2
]}

机构：

[1] Univ Cagliari, Dipartimento Sci Chim & Geol, I-09042 Cagliari, Italy

[2] Univ Cagliari, INSTM, I-09042 Cagliari, Italy

[3] Ctr Ric Casaccia, ENEA, I-00123 Rome, Italy

来源：

FUEL | 2012年 / 102卷

关键词：

H2S removal; Sorbents; ZnO; SBA-15; Regeneration; HYDROGEN-SULFIDE; SBA-15; DESULFURIZATION; CATALYST; AREA;

D O I：

10.1016/j.fuel.2012.05.013

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

ZnO/SBA-15 composites for mid-temperature H2S removal were prepared by both conventional Incipient Wetness and Two-Solvents impregnation techniques. The composites, differing as to the ZnO loading and the calcination treatment, were characterised by X-ray diffraction, transmission electron microscopy (also in the high resolution mode) and N-2 physisorption. Characterisation techniques revealed that zinc oxide was highly dispersed into/over the well-ordered mesoporous channels. In all the composites the mesostructure of the support was still retained together with a high surface area, large pore volume and uniform pore size. The sorbent performance for H2S removal from a H2S/He stream was investigated and compared with a commercial ZnO sorbent. The confinement of the active phase in the SBA-15 structure enhances its ability to interact with hydrogen sulphide, which results in improved performance. Temperature-programmed experiments were carried out for selecting appropriate regeneration conditions. The regenerated sorbent showed a sorption capacity even higher than that of the fresh ones. Such behaviour is maintained in repeated sorption/regeneration cycles. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：691 / 700

页数：10

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