Tunable KIT-6 Mesoporous Sulfonic Acid Catalysts for Fatty Acid Esterification

被引：184

作者：

Pirez, Cyril ^{[1
]}

Caderon, Jean-Michel ^{[1
]}

Dacquin, Jean-Philippe ^{[1
]}

Lee, Adam F. ^{[1
]}

Wilson, Karen ^{[1
]}

机构：

[1] Cardiff Univ, Cardiff Catalysis Inst, Sch Chem, Cardiff CF10 3AT, S Glam, Wales

来源：

ACS CATALYSIS | 2012年 / 2卷 / 08期

基金：

英国工程与自然科学研究理事会;

关键词：

biodiesel; nanostructured silicas; green chemistry; solid acids; esterification; BIODIESEL PRODUCTION; SOLID ACID; TRANSESTERIFICATION; SILICA; SBA-15; OIL; COPOLYMER; TRIBLOCK; ZIRCONIA;

D O I：

10.1021/cs300161a

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：

We report the first catalytic application of pore-expanded KIT-6 propylsulfonic acid (PrSO3H) silicas, in fatty acid esterification with methanol under mild conditions. As-synthesized PrSO3H-KIT-6 exhibits a 40 and 70% enhancement in turnover frequency (TOF) toward propanoic and hexanoic acid esterification, respectively, over a PrSO3H-SBA-15 analogue of similar 5 nm pore diameter, reflecting the improved mesopore interconnectivity of KIT-6 over SBA-15. However, pore accessibility becomes rate-limiting in the esterification of longer chain lauric and palmitic acids over both solid acid catalysts. This problem can be overcome via hydrothermal aging protocols which permit expansion of the KIT-6 mesopore to 7 nm, thereby doubling the TOF for lauric and palmitic acid esterification over that achievable with PrSO3H-SBA-15.

引用

页码：1607 / 1614

页数：8

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