CoH-FBZ催化剂表征及选择催化CH<sub>4</sub>还原NO

ZHANG Jinqiao; LIU Yuying; FAN Weibin; LI Ruifeng

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CoH-FBZ催化剂表征及选择催化CH₄还原NO

更新时间：2025-12-10

- CoH-FBZ催化剂表征及选择催化CH₄还原NO
- CIESC Journal Issue 9, (2006)
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- Online First：25 September 2006，
  
  Published：25 September 2006
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ZHANG Jinqiao, LIU Yuying, FAN Weibin, et al. CoH-FBZ催化剂表征及选择催化CH₄还原NO[J]. CIESC Journal, 2006, (9).
DOI：

ZHANG Jinqiao, LIU Yuying, FAN Weibin, et al. CoH-FBZ催化剂表征及选择催化CH₄还原NO[J]. CIESC Journal, 2006, (9). DOI：

摘要

一种具有FAU和BEA双微孔拓扑结构的分子筛催化剂CoH-FBZ用于富氧条件下CH4催化还原NO(CH4-SCR)，应用XRD、FT-IR、DRS-UV-Vis、SEM、AAS、H2-TPR和NH3-TPD等技术对催化剂进行表征.结果表明，CoH-FBZ为均匀单一物相，XRD和FT-IR谱图中，FAU和BEA拓扑结构特征峰明显，NH3-TPD结果表明，双拓扑结构H-FBZ和CoH-FBZ中产生了新的强酸位.CoH-FBZ较CoH-Beta与CoH-Y机械混合样品的催化活性高;CoH-FBZ中FAU与BEA拓扑结构的相对含量FAU/BEA为(0.4∶0.6)～(0.1∶0.9)时，催化剂具有高的CH4-SCR催化活性.强酸位与Co协同作用有利于提高催化剂的CH4-SCR催化活性.

Abstract

Selective catalytic reduction of NO by CH4(CH4-SCR) in the presences of excess oxygen was studied over CoH-FBZ catalysts with FAU and BEA double micro-porous topology structure.The catalysts were characterized with XRD

FT-IR

SEM

DRS-UV-Vis

NH3-TPD and H2-TPR techniques.The results showed that uniform morphology was observed over the SEM images of CoH-FBZ.Characteristic peaks attributed to FAU and BEA topology structure were observed over the XRD patterns and the FT-IR spectra of the CoH-FBZ catalysts.New strong acidic sites were formed over H-FBZ and CoH-FBZ based on the NH3-TPD results.CoH-FBZ exhibited higher CH4-SCR activity than the physical mixture of CoH-Y and CoH-Beta with comparable relative content of BEA topology structure.Over the physical mixture catalysts of CoH-Y and CoH-Beta

the CH4-SCR activity decreased with increasing relative content of CoH-Y.In contrast

CoH-FBZ in which the relative content of the FAU to BEA topology structure was (0.4∶0.6)—(0.1∶0.9) exhibited better CH4-SCR catalytic properties.The synergistic effect of the new strong acidic sites promoted the reduction of NO by CH4.

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CoH-FBZ催化剂表征及选择催化CH4还原NO

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CoH-FBZ催化剂表征及选择催化CH₄还原NO