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Title:
Effect of SO2 on Catalytic CO Oxidation Over Nano-Structured, Mesoporous Au/Ce1-xZrxO2 Catalysts
Author: Valechha, Dolly1; Megarajan, Suresh Kumar2; Fakeeha, Anis Hamza3; AL-Fatesh, Ahmed S.3; Labhasetwar, Nitin K.1
Source: CATALYSIS LETTERS
Issued Date: 2017-11-01
Volume: 147, Issue:11, Pages:2893-2900
Keyword: CO oxidation ; Gold nano particles ; Mixed metal oxide ; Catalyst ; Au/Ce1-xZrxO2
DOI: 10.1007/s10562-017-2182-6
DOC Type: Article
English Abstract: A series of nano-structured, mesoporous Au/Ce1 - xZrxO2 type catalysts were synthesized by first synthesizing Ce1-xZrxO2 type of support with different degree of Zr substitutions and following sol-gel route. One weight percent of Au was incorporated on these supports using deposition-precipitation method. These synthesized catalysts were characterized in detail by various techniques, and evaluated for their CO oxidation activity. Effect of SO2 poisoning on catalytic CO oxidation activity was also investigated in detail. It was observed that the catalytic activity for CO oxidation reaction depends on the Ce/Zr molar ratio. The effect of SO2 on CO oxidation was less prominent for the Zr incorporated 'Au/Ce0.8Zr0.2O2 (ACZ0.2)' as compared to bare 'Au/CeO2 (AC)' catalyst. In case of ACZ0.2, the activity remains quite stable even after 5 h of SO2 exposure, however, after 12 and 18 h, the activity decreases to 62 and 55%, respectively. Whereas AC catalyst shows rapid decline in catalytic activity from the first hour of SO2 exposure, and continue to decline significantly to 35 and 18% after 12 and 18 h of SO2 exposure, respectively. Multiple regeneration studies of both bare and Zr incorporated catalysts show pronounced improvement/regain in catalytic activity.
WOS Headings: Science & Technology ; Physical Sciences
WOS Subject: Chemistry, Physical
WOS Subject Extended: Chemistry
WOS Keyword Plus: CEO2-ZRO2 MIXED OXIDES ; GAS SHIFT REACTION ; CARBON-MONOXIDE ; TEMPERATURE OXIDATION ; AU NANOPARTICLES ; GOLD CATALYSTS ; MG-AL ; CERIA ; SUPPORT ; CU
Indexed Type: SCI
Funder: International Scientific Partnership Programme through ISPP of King Saud University, Riyadh, Saudi Arabia(0057) ; King Saud University ; CSIR-NEERI
Language: 英语
WOS ID: WOS:000412660200021
Citation statistics:
Content Type: 期刊论文
URI: http://ir.qibebt.ac.cn/handle/337004/9746
Appears in Collections:膜分离与催化团队_期刊论文

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description.institution: 1.CSIR NEERI, Energy & Resource Management Div, Nehru Marg, Nagpur 440020, Maharashtra, India
2.Chinese Acad Sci, Key Lab Biobased Mat, Qingdao Inst Bioenergy & Bioproc Technol, 189 Songling Rd, Qingdao 266101, Peoples R China
3.King Saud Univ, Chem Engn Dept, Coll Engn, POB 800, Riyadh 11421, Saudi Arabia

Recommended Citation:
Valechha, Dolly,Megarajan, Suresh Kumar,Fakeeha, Anis Hamza,et al. Effect of SO2 on Catalytic CO Oxidation Over Nano-Structured, Mesoporous Au/Ce1-xZrxO2 Catalysts[J]. CATALYSIS LETTERS,2017,147(11):2893-2900.
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