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Hao S, Li B, Liu Z, Huang W, Jiang D, Xia L. Catalytic reactions of oxalic acid degradation with Pt/SiO 2 as a catalyst in nitric acid solutions. RSC Adv 2023; 13:22758-22768. [PMID: 37502826 PMCID: PMC10370483 DOI: 10.1039/d3ra01244a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Accepted: 05/10/2023] [Indexed: 07/29/2023] Open
Abstract
Large quantities of solutions containing oxalic acid and nitric acid are produced from nuclear fuel reprocessing, but oxalic acid must be removed before nitric acid and plutonium ions can be recovered in these solutions. The degradation of oxalic acid with Pt/SiO2 as a catalyst in nitric acid solutions has the characteristics of a fast and stable reaction, recyclable catalyst, and no introduction of impurity ions into the system. This method is one of the preferred alternatives to the currently used reaction of KMnO4 with oxalic acid but lacks theoretical support. Therefore, this study attempts to clarify the reaction mechanism of the method. First, there was no induction period for this catalytic reaction, and no evidence was found that the nitrous acid produced in the solution could have an effect on oxalic acid degradation. Furthermore, oxidation intermediates (structures of Pt-O) were formed through this reaction between NO3- adsorbed on the active sites and Pt on the catalyst surface, but H+ greatly promoted the reaction. Additionally, oxalic acid degradation through the oxidative dehydrogenation reaction occurred between oxalic acid molecules (HOOC-COOH) and Pt-O, with ·OOC-COOH, which is easily self-decomposable especially in acidic solution, generated simultaneously, and finally CO2 was produced.
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Affiliation(s)
- Shuai Hao
- School of Nuclear Science and Technology, University of South China China
| | - Bin Li
- China Institute of Atomic Energy P. O. Box 275-88 China
| | - Zhanyuan Liu
- China Institute of Atomic Energy P. O. Box 275-88 China
| | - Wenlong Huang
- School of Nuclear Science and Technology, University of South China China
| | - Dongmei Jiang
- Institute of Innovation and Entrepreneurship, University of South China China
| | - Liangshu Xia
- School of Nuclear Science and Technology, University of South China China
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Liu L, Han Z, Lv Y, Xin C, Zhou X, Yu L, Tai X. MIL-100(Fe) Supported Pt-Co Nanoparticles as Active and Selective Heterogeneous Catalysts for Hydrogenation of 1,3-Butadiene. Chemistry 2022; 11:e202100288. [PMID: 35191614 PMCID: PMC8889502 DOI: 10.1002/open.202100288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 01/30/2022] [Indexed: 11/23/2022]
Abstract
Superior catalytic performance for selective 1,3‐butadiene (1,3‐BD) hydrogenation can usually be achieved with supported bimetallic catalysts. In this work, Pt−Co nanoparticles and Pt nanoparticles supported on metal–organic framework MIL‐100(Fe) catalysts (MIL=Materials of Institut Lavoisier, PtCo/MIL‐100(Fe) and Pt/MIL‐100(Fe)) were synthesized via a simple impregnation reduction method, and their catalytic performance was investigated for the hydrogenation of 1,3‐BD. Pt1Co1/MIL‐100(Fe) presented better catalytic performance than Pt/MIL‐100(Fe), with significantly enhanced total butene selectivity. Moreover, the secondary hydrogenation of butenes was effectively inhibited after doping with Co. The Pt1Co1/MIL‐100(Fe) catalyst displayed good stability in the 1,3‐BD hydrogenation reaction. No significant catalyst deactivation was observed during 9 h of hydrogenation, but its catalytic activity gradually reduces for the next 17 h. Carbon deposition on Pt1Co1/MIL‐100(Fe) is the reason for its deactivation in 1,3‐BD hydrogenation reaction. The spent Pt1Co1/MIL‐100(Fe) catalyst could be regenerated at 200 °C, and regenerated catalysts displayed the similar 1,3‐BD conversion and butene selectivity with fresh catalysts. Moreover, the rate‐determining step of this reaction was hydrogen dissociation. The outstanding activity and total butene selectivity of the Pt1Co1/MIL‐100(Fe) catalyst illustrate that Pt−Co bimetallic catalysts are an ideal alternative for replacing mono‐noble‐metal‐based catalysts in selective 1,3‐BD hydrogenation reactions.
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Affiliation(s)
- Lili Liu
- School of Chemistry & Chemical Engineering and Environmental Engineering, Weifang University, Weifang, 261061, Shandong, P.R. China
| | - Zhixuan Han
- School of Chemistry & Chemical Engineering and Environmental Engineering, Weifang University, Weifang, 261061, Shandong, P.R. China
| | - Yifan Lv
- School of Chemistry & Chemical Engineering and Environmental Engineering, Weifang University, Weifang, 261061, Shandong, P.R. China
| | - Chunling Xin
- School of Chemistry & Chemical Engineering and Environmental Engineering, Weifang University, Weifang, 261061, Shandong, P.R. China
| | - Xiaojing Zhou
- School of Chemistry & Chemical Engineering and Environmental Engineering, Weifang University, Weifang, 261061, Shandong, P.R. China
| | - Lei Yu
- School of Chemistry & Chemical Engineering and Environmental Engineering, Weifang University, Weifang, 261061, Shandong, P.R. China
| | - Xishi Tai
- School of Chemistry & Chemical Engineering and Environmental Engineering, Weifang University, Weifang, 261061, Shandong, P.R. China
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Shi J, Gao Y, Zang L, Shen Z, Peng G. Performance of Pd/Sn catalysts supported by chelating resin prestoring reductant for nitrate reduction in actual water. ENVIRONMENTAL RESEARCH 2021; 201:111577. [PMID: 34228952 DOI: 10.1016/j.envres.2021.111577] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 04/30/2021] [Accepted: 06/20/2021] [Indexed: 06/13/2023]
Abstract
Catalytic hydrogen reduction has appeared as a promising strategy for chemical denitrification with advantages of high activity and simple operation. However, the risk and low utilization of H2 is the disadvantage of catalytic hydrogen reduction. In recent years, catalytic reduction reactions in the presence of sodium borohydride (NaBH4) have been extensively studied. NaBH4 can be used as an electron source to generate electrons on the surface of the catalyst and can catalyze the reduction of pollutants. But it makes commercialization costly and causes significant environmental pollution if widely use NaBH4. In this study, we prepared supported Pd/Sn bimetallic nanoparticles which could adsorb NaBH4 during the preparation of the Pd/Sn bimetallic catalyst as the prestoring reductant. No additional reducing agent is required during nitrate reduction process. The performance and mechanism for nitrate reduction by using Pd/Sn bimetallic nanoparticles were discussed. Moreover, the catalyst D-Pd1/Sn1 reached a complete nitrate removal in the municipal wastewater treatment plant effluent water within 3 h. The results provide a prospect for denitrification in biological wastewater treatment plants.
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Affiliation(s)
- Jialu Shi
- Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, School of Environment, Henan Normal University, 64 East of Construction Road, Xinxiang, 453007, China; State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, 163 Xianlin Avenue, Nanjing, 210046, China.
| | - Ya Gao
- Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, School of Environment, Henan Normal University, 64 East of Construction Road, Xinxiang, 453007, China
| | - Ling Zang
- Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, School of Environment, Henan Normal University, 64 East of Construction Road, Xinxiang, 453007, China; School of Civil Engineering, Southeast University, Nanjing, 211189, China
| | - Zhanhui Shen
- Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, School of Environment, Henan Normal University, 64 East of Construction Road, Xinxiang, 453007, China; State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, 163 Xianlin Avenue, Nanjing, 210046, China
| | - Gege Peng
- Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, School of Environment, Henan Normal University, 64 East of Construction Road, Xinxiang, 453007, China
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