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Large-pore mesoporous RuNi-doped TiO2–Al2O3 nanocomposites for highly efficient selective CO methanation in hydrogen-rich reformate gases

Paper ID Volume ID Publish Year Pages File Format Full-Text
45609 46416 2015 11 PDF Available
Title
Large-pore mesoporous RuNi-doped TiO2–Al2O3 nanocomposites for highly efficient selective CO methanation in hydrogen-rich reformate gases
Abstract

•Large-pore mesoporous RuNi-doped TiO2–Al2O3 composites were synthesized.•1 vol% CO can efficiently be removed to levels of less than 50 ppm by SMET method.•MRNAT-30Ni exhibits long-term stability under realistic reaction conditions.

A series of large-pore mesoporous RuNi-doped TiO2–Al2O3 nanocomposites were prepared by a facile sol–gel method using a one-pot protocol based on evaporation-induced self-assembly. Owing to high density of active sites, an open nanoarchitecture and highly promotional efficiency by synergetic effects, the as-prepared nanocomposites demonstrated excellent catalytic properties in selective CO methanation (CO-SMET). The final concentration of CO can be reduced to less than 50 ppm with more than 50% selectivity over the MRNAT-30Ni catalyst. The working temperature window covered the typical working range of 200–250 °C in conventional upstream low-temperature shift reactors. The MRNAT-30Ni catalyst has excellent stability during 200 h time on stream with no detectable change in CO and CH4 concentrations, and CO in outlet reaches level below 20 ppm under realistic reaction conditions. This remarkable improvement of activity/selectivity and stability could lead to wide implementation of this one-pot protocol for the synthesis of large-pore mesoporous nanocomposite catalysts for the CO-SMET process.

Graphical abstractLarge-pore mesoporous RuNi-doped TiO2–Al2O3 composite catalysts were synthesized by a one-pot protocol based on evaporation-induced self-assembly. 1 vol% CO contained in hydrogen was cleaned to less than 50 ppm over MRNAT-30Ni by selective CO methanation with a working temperature window greater than 50 °C that included the typical working range (200–250 °C). The catalyst also exhibited long-term stability with CO outlet concentration below 20 ppm under realistic reaction conditions.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Selective CO methanation; Mesoporous nanocomposites; One-pot synthesis; Ru doping; Nickel catalysts
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Large-pore mesoporous RuNi-doped TiO2–Al2O3 nanocomposites for highly efficient selective CO methanation in hydrogen-rich reformate gases
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 165, April 2015, Pages 752–762
Authors
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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