SO₂-tolerant and H₂O-promoting Pt/C catalysts for efficient NO removal via fixed-bed H₂-SCR

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• 作者：Baosheng Tu ; Nian Shi ; Wei Sun ; Limei Cao…
• 关键词：H2 ; SCR ; NOX ; Pt/C ; SO2
• 刊名：Environmental Science and Pollution Research
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：24
• 期：1
• 页码：676-684
• 全文大小：
• 刊物类别：Earth and Environmental Science
• 刊物主题：Environment, general; Environmental Chemistry; Ecotoxicology; Environmental Health; Atmospheric Protection/Air Quality Control/Air Pollution; Waste Water Technology / Water Pollution Control / Water M
• 出版者：Springer Berlin Heidelberg
• ISSN：1614-7499
• 卷排序：24

文摘

In this paper, Pt supports on carbon black powder (Vulcan XC-72) were synthesized via a hydrothermal method for selective catalytic reduction (SCR) of NO with H₂ in the presence of 2 vol% O₂ over a wide temperature of 20–300 °C. The results showed that the 3 and 5 wt% Pt/C catalysts resulted in high NO conversion (>90 %) over a temperature range of 120 to 300 °C, and the maximum NO conversion of 98.6 % was achieved over 5 wt% Pt/C at 120 °C. Meanwhile, the influence of SO₂ and H₂O on the catalyst performance of 3 wt% Pt/C was investigated. The catalysts exhibited good SO₂ poisoning resistance when the SO₂ concentration was lower than 260 ppm. Moreover, a positive effect on NO conversion was detected with the addition of 3 and 5 vol% H₂O in the feed gas stream.