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CO2 reforming of methane over Mn promoted Ni/Al2O3 catalyst treated by N2 glow discharge plasma

Paper ID Volume ID Publish Year Pages File Format Full-Text
53953 46990 2015 6 PDF Available
Title
CO2 reforming of methane over Mn promoted Ni/Al2O3 catalyst treated by N2 glow discharge plasma
Abstract

•The N2 plasma treated Ni/Al2O3 catalyst was enhanced by manganese promoter.•The CH4 conversion of plasma treated Ni-Mn/Al2O3 catalyst increased by 10% at 700 °C.•Mn promoter further intensified the reducibility of plasma treated catalyst.•The concentration of absorbed CO2 was increased obviously by doping Mn promoter.•The coking-resistant ability of plasma treated catalyst was increased by manganese promoter.

The N2 plasma treated Ni/Al2O3 catalyst was enhanced by manganese (Mn) promoter with doping content ranging from 5 wt% to 15 wt%. Compared to the plasma treated nickel catalyst without Mn additive, the introduction of Mn promoter further increased the CH4 conversion of studied catalysts about 10% at 700 °C for CO2 reforming of methane. After 360 min reaction of time-on-stream, the deactivation degree value was decreased to 1.46%. Relatively lower value of 5–10 wt% doping amount of Mn was appropriate. Mn promoter further intensified the reducibility of plasma treated catalyst according to the shift to lower temperature of the reduction peak shown in H2-TPR profiles. CO2-TPD results suggested that the modification effect of Mn promoter on the basicity of plasma treated catalyst was speculated to account for the concentration increase of absorbed CO2. It was beneficial to the carbon deposition elimination and it increased the coking-resistant ability of catalyst surface, while this result was in good agreement with the CO2-TPSR and TG results. The lower temperature and smaller area of CO peak was observed over plasma treated Ni-Mn/Al2O3 catalyst in CO2-TPSR test, i.e., less coke formation on the Mn promoted sample.

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Keywords
Manganese promoter; Coke resistance; Plasma; Ni-based catalyst; CO2 reforming of methane; TPSR
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CO2 reforming of methane over Mn promoted Ni/Al2O3 catalyst treated by N2 glow discharge plasma
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 256, Part 1, 1 November 2015, Pages 124–129
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