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Wang F, Da B, Jin Y, Sanwal P, Cui L, Chen S, Xu J, Xue B, Li G. Insight into the effect of manganese oxidation state on the synthesis of ethylene urea from CO 2 and ethylenediamine. J Environ Sci (China) 2025; 155:37-47. [PMID: 40246472 DOI: 10.1016/j.jes.2024.11.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2024] [Revised: 11/19/2024] [Accepted: 11/20/2024] [Indexed: 04/19/2025]
Abstract
Herein, a series of manganese oxide catalysts with different valences (Mn3O4, Mn2O3, and MnO2) were designed and synthesized for the synthesis of ethylene urea (EU) from ethylenediamine (EDA) and carbon dioxide (CO2). With a maximal EDA conversion of 82 % and EU selectivity of 99 % at 160 °C for 2 h, Mn2O3 catalysts had the best catalytic activity among them, which was superior to the reported catalysts. In the following order: Mn2O3 > MnO2 > Mn3O4, the catalytic activity for the synthesis of EU from CO2 and EDA decreased. Further characterization showed the Mn2O3 catalyst possessed a greater Mn3+/Mn4+ ratio and more surface oxygen vacancies than the MnO2 and Mn3O4, which improved its capacity to adsorb and activate CO2 and EDA. After four recycling runs, the EDA conversion slightly declined from 82 % to 56 % on Mn2O3 catalyst, while no obvious change in EU selectivity was observed. The loss of surface Ov contents and Mn3+ proportion were concluded as main reasons for the decrease in catalytic activity over Mn2O3 catalyst. This work demonstrated a metal oxide catalyst that was efficient in producing EU from CO2 and EDA.
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Affiliation(s)
- Fei Wang
- Jiangsu Province Key Laboratory of Fine Petrochemical Engineering, Advanced Catalysis, and Green Manufacturing Collaborative Innovation Center, School of Petrochemical and Engineering, Changzhou University, Changzhou 213164, China
| | - Biao Da
- Jiangsu Province Key Laboratory of Fine Petrochemical Engineering, Advanced Catalysis, and Green Manufacturing Collaborative Innovation Center, School of Petrochemical and Engineering, Changzhou University, Changzhou 213164, China
| | - Yulong Jin
- Jiangsu Province Key Laboratory of Fine Petrochemical Engineering, Advanced Catalysis, and Green Manufacturing Collaborative Innovation Center, School of Petrochemical and Engineering, Changzhou University, Changzhou 213164, China
| | - Piracha Sanwal
- Institute of Catalysis for Energy and Environment, College of Chemistry and Chemical Engineering, Shenyang Normal University, Shenyang 110034, China; State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Lei Cui
- Jiangsu Province Key Laboratory of Fine Petrochemical Engineering, Advanced Catalysis, and Green Manufacturing Collaborative Innovation Center, School of Petrochemical and Engineering, Changzhou University, Changzhou 213164, China
| | - Siru Chen
- Jiangsu Province Key Laboratory of Fine Petrochemical Engineering, Advanced Catalysis, and Green Manufacturing Collaborative Innovation Center, School of Petrochemical and Engineering, Changzhou University, Changzhou 213164, China
| | - Jie Xu
- Jiangsu Province Key Laboratory of Fine Petrochemical Engineering, Advanced Catalysis, and Green Manufacturing Collaborative Innovation Center, School of Petrochemical and Engineering, Changzhou University, Changzhou 213164, China
| | - Bing Xue
- Jiangsu Province Key Laboratory of Fine Petrochemical Engineering, Advanced Catalysis, and Green Manufacturing Collaborative Innovation Center, School of Petrochemical and Engineering, Changzhou University, Changzhou 213164, China.
| | - Gao Li
- Institute of Catalysis for Energy and Environment, College of Chemistry and Chemical Engineering, Shenyang Normal University, Shenyang 110034, China; State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
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Chudasama SJ, Shah BJ, Patel KM, Dhameliya TM. The spotlight review on ionic liquids catalyzed synthesis of aza- and oxa-heterocycles reported in 2021. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119664] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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