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Impact of the promoter on the performance of carbon-supported Pt-Bi and Pt-Sb catalysts for the oxidative coupling of 2-Methyl-1-naphthol. REACTION KINETICS MECHANISMS AND CATALYSIS 2021. [DOI: 10.1007/s11144-021-02038-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Liu J, Lu S, Wang L, Qi T, Qi D, Xing X, Zhang Y, Xiao H, Zhang S. Co-site substitution by Mn supported on biomass-derived active carbon for enhancing magnesia desulfurization. JOURNAL OF HAZARDOUS MATERIALS 2019; 365:531-537. [PMID: 30469032 DOI: 10.1016/j.jhazmat.2018.11.040] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Revised: 10/28/2018] [Accepted: 11/10/2018] [Indexed: 06/09/2023]
Abstract
Oxidation of magnesium sulfite (MgSO3) is a crucial step for reclaiming the product in wet magnesia desulfurization processes. Here, for enhancing this reaction, a bimetallic catalyst was developed by loading CoOx and MnOx species on a biomass-derived active carbon (AC) support to minimize the costs and potential environmental risks during catalyst application. The substitution effect of Mn to Co sites was investigated, and a comparison of the catalyst with plain cobalt suggested that the ratio of Co/Mn must be greater than 3. A series of catalyst characterizations was performed to reveal the synergistic effect of Co and Mn in the bimetallic catalyst. The introduction of Mn species not only improved the dispersion of CoOx-MnOx mixed oxide but also generated abundant Co3+ species and surface-adsorbed oxygen, both of which acted as the main active sites for sulfite oxidation. Notably, in the bimetallic catalyst, the presence of Mn4+ species assisted regeneration of Co2+ to Co3+ species, further accelerating sulfite oxidation. Besides, the partial substitution of Co sites by Mn also suppressed the losing of Co species during reaction, favoring to decrease the environmental risk, as well as to save the cost of catalyst.
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Affiliation(s)
- Jie Liu
- MOE Key Lab of Resources and Environmental Systems Optimization, North China Electric Power University, Beijing 102206, China; School of Environmental Science and Engineering, North China Electric Power University, Baoding 071003, China
| | - Su Lu
- MOE Key Lab of Resources and Environmental Systems Optimization, North China Electric Power University, Beijing 102206, China; School of Environmental Science and Engineering, North China Electric Power University, Baoding 071003, China
| | - Lidong Wang
- MOE Key Lab of Resources and Environmental Systems Optimization, North China Electric Power University, Beijing 102206, China; School of Environmental Science and Engineering, North China Electric Power University, Baoding 071003, China.
| | - Tieyue Qi
- MOE Key Lab of Resources and Environmental Systems Optimization, North China Electric Power University, Beijing 102206, China; School of Environmental Science and Engineering, North China Electric Power University, Baoding 071003, China
| | - Dan Qi
- MOE Key Lab of Resources and Environmental Systems Optimization, North China Electric Power University, Beijing 102206, China; School of Environmental Science and Engineering, North China Electric Power University, Baoding 071003, China
| | - Xinyu Xing
- MOE Key Lab of Resources and Environmental Systems Optimization, North China Electric Power University, Beijing 102206, China; School of Environmental Science and Engineering, North China Electric Power University, Baoding 071003, China
| | - Yaoyu Zhang
- MOE Key Lab of Resources and Environmental Systems Optimization, North China Electric Power University, Beijing 102206, China; School of Environmental Science and Engineering, North China Electric Power University, Baoding 071003, China
| | - Huining Xiao
- Department of Chemical Engineering, University of New Brunswick, Fredericton, NB, E3B 5A3, Canada
| | - Shihan Zhang
- College of Environment, Zhejiang University of Technology, Hangzhou, 310014, China
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Maphoru MV, Heveling J, Kesavan Pillai S. Oxidative Coupling of 2-Methyl-1-naphthol: A Comparison between Bismuth-Promoted Pt, Pd and Ag Catalysts. ChemistrySelect 2018. [DOI: 10.1002/slct.201801148] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Mabuatsela V. Maphoru
- Department of Chemistry; Tshwane University of Technology, Private Bag X680; Pretoria 0001 South Africa
| | - Josef Heveling
- Department of Chemistry; Tshwane University of Technology, Private Bag X680; Pretoria 0001 South Africa
| | - Sreejarani Kesavan Pillai
- National Centre for Nano-Structured Materials; Council for Scientific and Industrial Research, PO Box 395; Pretoria 0001 South Africa
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