fulltext.study @t Gmail

Partial oxidation of methane on NixAlBEA and NixSiBEA zeolite catalysts: Remarkable effect of preparation procedure and Ni content

Paper ID Volume ID Publish Year Pages File Format Full-Text
45202 46405 2014 10 PDF Available
Title
Partial oxidation of methane on NixAlBEA and NixSiBEA zeolite catalysts: Remarkable effect of preparation procedure and Ni content
Abstract

•Two different C-NixSiBEA and C-NixAlBEA catalytic systems was obtained with varied physicochemical properties•The crystal structure of both catalysts series was preserved even treatment at 750 °C•The most active and stable catalysts in POM reaction were C-Ni5SiBEA and C-Ni10SiBEA•The carbon deposit was not observed for both catalytic system•The deactivation of C-NixAlBEA catalysts is probably related to sintering of Ni species

This work reports on the investigation of the influence of the preparation procedure and Ni content on partial oxidation of methane to synthesis gas. For this purpose the Ni-containing zeolite catalysts were prepared by two different methods: a conventional wet impregnation method (NixAlBEA series), in which Ni ions were introduced mainly in the extra framework position and a two-step postsynthesis method (NixSiBEA series), which allowed incorporating Ni ions into the zeolite framework. Calcined NixAlBEA and NixSiBEA zeolite catalysts showed different physicochemical properties and thermal stability in POM reaction. The C-NixSiBEA catalysts demonstrated very high activity (100% conversion of CH4) and selectivity to CO (up to 100%) and resistance to deactivation. Moreover, they were much more stable than C-NixAlBEA catalysts. On neither of 2 series of catalysts carbon deposition was observed in contrast to the catalysts usually used and described in literature. The TPR-H2 experiments showed the presence of different Ni species in C-NixSiBEA and C-NixAlBEA catalysts and XRD analysis proved that dealumination and high temperature treatment did not destroy the zeolite structure.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
POM reaction; Synthesis gas; Ni catalysts; BEA zeolite
First Page Preview
Partial oxidation of methane on NixAlBEA and NixSiBEA zeolite catalysts: Remarkable effect of preparation procedure and Ni content
Get Full-Text Now
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
Online Support
Any Questions? feel free to contact us
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 146, March 2014, Pages 227–236
Authors
, , , , , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
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
Online Support
Any Questions? feel free to contact us