Conversion of South African Coal Fly Ash into High-Purity ZSM-5 Zeolite without Additional Source of Silica or Alumina and Its Application as a Methanol-to-Olefins Catalyst

被引：24

作者：

Missengue, Roland N. M. ^{[1
,4
]}

Losch, Pit ^{[2
]}

Musyoka, Nicholas M. ^{[3
]}

Louis, Benoit ^{[2
]}

Pale, Patrick ^{[2
]}

Petrik, Leslie F. ^{[1
]}

机构：

[1] Univ Western Cape, Dept Chem, ZA-7535 Cape Town, South Africa

[2] Univ Strasbourg, CNRS, Inst Chem, UMR 7177, F-67000 Strasbourg, France

[3] CSIR, ZA-0001 Pretoria, South Africa

[4] AgriProt Technol, Dept Res & Dev, ZA-7750 Cape Town, South Africa

来源：

CATALYSTS | 2018年 / 8卷 / 04期

基金：

新加坡国家研究基金会;

关键词：

coal fly ash; coal fly ash extract; oxalic acid treatment; structure-directing agent; ZSM-5 and methanol-to-olefins; HYDROTHERMAL SYNTHESIS; CRYSTAL SIZE; MORPHOLOGY; TRANSFORMATION; ACTIVATION; TEMPLATE; ANION; RATIO; NMR;

D O I：

10.3390/catal8040124

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Characteristics of ZSM-5 synthesized from H2SO4-treated coal fly ash and fused coal fly ash extracts are compared in this study. In the synthesis process, fused coal fly ash extract (without an additional silica source) was used in the synthesis of ZSM-5. The effect of the structure-directing agent (tetrapropylammonium bromide, 1,6-hexanediamine or 1-propylamine) on the properties and methanol-to-olefins (MTO) effectiveness of the fly ash-based ZSM-5 was also investigated. A pure ZSM-5 synthesized from the fused coal fly ash extract led to a methanol conversion higher than 90% after 5 h on stream. The template 1,6-hexanediamine led to the synthesis of the most stable fly ash-based catalyst keeping a 44% methanol conversion after 24 h on stream.

引用

页数：14

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