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An investigation of the surface intermediates of H2-SCR of NOx over Pt/H-FER

Paper ID Volume ID Publish Year Pages File Format Full-Text
46896 46452 2011 6 PDF Available
Title
An investigation of the surface intermediates of H2-SCR of NOx over Pt/H-FER
Abstract

Catalytic performance of platinum supported on H-ferrierite (H-FER) in selective catalytic reduction of NO and NO2 by hydrogen (H2-SCR) was investigated. 87.9% of the NOx was reduced with 56% of selectivity to N2 when a gas mixture of 910 ppm NO, 90 ppm NO2, 5000 ppm H2, 10% O2 in N2 passed through a 0.5 wt.%Pt/H-FER catalyst at 110 °C and gas hourly space velocity (GHSV) of 36,000 h−1. It was found that the NOx reduction sharply decreased at higher reaction temperature, accompanied by large amount of NO2 formation. The NOx conversion was also drastically decreased by increasing the concentration of NO2 while holding the total concentration of NO + NO2 in the feed gas mixture. Based on in situ Fourier transform infrared spectroscopy investigation, it was proposed that NO2 and nitrate species were not essential intermediates of H2-SCR over the catalyst, while NOδ+ species on Pt was a possible species for efficient elimination of NO.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► High NOx elimination level was reached in H2-SCR at 110 °C over 0.5%Pt/H-FER. ► The reaction route over the catalyst was investigated. ► NO2 and nitrate species were demonstrated not to be intermediates of the reaction. ► NO2 was firstly reduced to NO when it engaged in the reaction over the catalyst.

Keywords
Reaction intermediate; NO2; H2-SCR; H-ferrierite
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An investigation of the surface intermediates of H2-SCR of NOx over Pt/H-FER
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 107, Issues 3–4, 21 September 2011, Pages 380–385
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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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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Any Questions? feel free to contact us