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Low temperature H2-SCR over platinum catalysts supported on Ti-containing MCM-41

Paper ID Volume ID Publish Year Pages File Format Full-Text
47692 46480 2010 9 PDF Available
Title
Low temperature H2-SCR over platinum catalysts supported on Ti-containing MCM-41
Abstract

A series of Ti-containing MCM-41 were prepared by isomorphously substitution, wet impregnation and mechanical mixing. Ti-containing MCM-41 materials, together with reference Si–MCM-41, were characterized by means of XRD, TEM and low temperature N2 adsorption/desorption. The nature of Ti species on Ti-containing MCM-41 was analyzed by means of UV–vis and Raman spectroscopy. Pt catalysts supported on Si–MCM-41 and Ti-containing MCM-41 were studied for the selective catalytic reduction of NO by hydrogen in excess oxygen. Particular attention was paid to the promotion effect of different Ti species on the catalytic activity for H2-SCR and the origin thereof. Pt/Ti–MCM-41 prepared by wet impregnation with the Ti/Si ratio of 0.6 exhibited the best activity and ca. 89% NOx conversion as well as ca. 79% N2 selectivity, could be achieved at 140 °C with a feed stream containing 1000 ppm NO, 5000 ppm H2, 6.7% O2 at a high GHSV of 80,000 h−1. Moreover, Pt–Ti–MCM-41 exhibited good duration and good tolerance to co-existing 20 ppm SO2 or 50 ppm CO, which demonstrated its potential for future applications.

Keywords
NO selective reduction; Hydrogen; Pt; Ti–MCM-41
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Low temperature H2-SCR over platinum catalysts supported on Ti-containing MCM-41
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 94, Issues 3–4, 10 February 2010, Pages 254–262
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