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Catalytic activity of mesoporous Ga-SBA-15 materials in α-pinene isomerisation: Similarities and differences with Al-SBA-15 analogues

Paper ID Volume ID Publish Year Pages File Format Full-Text
42508 45928 2009 7 PDF Available
Title
Catalytic activity of mesoporous Ga-SBA-15 materials in α-pinene isomerisation: Similarities and differences with Al-SBA-15 analogues
Abstract

A complete investigation of the catalytic activity of Ga-SBA-15 materials in α-pinene isomerisation is presented here. The performances of solids with different Si/Ga ratios prepared either by grafting or direct synthesis are compared with those of Al-SBA-15 analogues. In the case of Ga samples prepared by direct synthesis, α-pinene conversion can reach 90%, in relatively mild experimental conditions (353 K, 1 h). Camphene and limonene represent more than 50% of the products formed. In the case of samples prepared by post-synthesis, α-pinene conversion decreases with the Ga content, but remains much higher than with the corresponding Al-SBA-15 materials. In this latter case, heavy compounds are the main products and can correspond to more than 50% of the isomerised α-pinene. Undeniably Ga-SBA-15 solids allow better yields of camphene + limonene and limit the production of heavy undesirable by-products.

Graphical abstractPerformances of Ga-SBA-15 materials with different Si/Ga ratios prepared either by grafting or direct synthesis are compared with those of Al-SBA-15 analogues. Undeniably Ga-SBA-15 solids allow better yields of camphene + limonene and limit the production of heavy undesirable by-products. After a thermal treatment, recycled Ga-SBA-15 solids turn out to be as active as the fresh catalyst.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Ga-SBA-15; Direct synthesis; Grafting; Pinene isomerisation; Camphene; Limonene
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Catalytic activity of mesoporous Ga-SBA-15 materials in α-pinene isomerisation: Similarities and differences with Al-SBA-15 analogues
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 368, Issues 1–2, 31 October 2009, Pages 132–138
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
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