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Xue L, Pang M, Yuan Z, Zhou D. Metal-Site Dispersed Zinc-Chromium Oxide Derived from Chromate-Intercalated Layered Hydroxide for Highly Selective Propane Dehydrogenation. Molecules 2024; 29:3063. [PMID: 38999013 PMCID: PMC11243157 DOI: 10.3390/molecules29133063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2024] [Revised: 06/21/2024] [Accepted: 06/24/2024] [Indexed: 07/14/2024] Open
Abstract
Propane dehydrogenation (PDH) is a crucial approach for propylene production. However, commonly used CrOx-based catalysts have issues including easy sintering at elevated reaction temperatures and relying on high acidity supports. In this work, we develop a strategy, to strongly anchor and isolate active sites against their commonly observed aggregation during reactions, by taking advantage of the net trap effect in chromate intercalated Zn-Cr layered hydroxides as precursors. Furthermore, the intercalated chromate overcomes the collapse of traditional layered hydroxides during their transformation to metal oxide, thus exposing more available active sites. A joint fine modulation including crystal structure, surface acidity, specific surface area, and active sites dispersion is performed on the final mixed metal oxides for propane dehydrogenation. As a result, Zn1Cr2-CrO42--MMO delivers attractive propane conversion (~27%) and propylene selectivity (>90%) as compared to other non-noble-metal-based catalysts.
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Affiliation(s)
- Lu Xue
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Maoqi Pang
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Zijian Yuan
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Daojin Zhou
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
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Li F, Wang L, Xu S, Liang S, Zhang N. Readily-fabricated supported MgO catalysts for efficient and green synthesis of diethyl carbonate from ethyl carbamate and ethanol. RSC Adv 2021; 11:15477-15485. [PMID: 35424079 PMCID: PMC8698246 DOI: 10.1039/d1ra01386f] [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: 02/20/2021] [Accepted: 04/18/2021] [Indexed: 11/21/2022] Open
Abstract
Developing cost-effective, high-efficiency and heterogeneous catalysts is of prime importance for the green synthesis of diethyl carbonate (DEC) from ethyl carbamate (EC) and ethanol. Herein, a series of MgO/γ-Al2O3 catalysts were readily fabricated by an impregnation method for DEC synthesis from EC and ethanol. The activities of the as-prepared MgO/γ-Al2O3 catalysts as well as the individual MgO or γ-Al2O3 were first tested in the batch reactor. Among the investigated samples, the MgO/γ-Al2O3 with a MgO loading of 10 wt% (denoted as 10% MgO/γ-Al2O3) exhibited the largest amount of stronger basic sites, and the highest activities with EC conversion of 41.8% and DEC yield of 30.4%, respectively. Furthermore, the DEC yield was greatly boosted to 52.1% with a high DEC selectivity of 93.8% over the 10% MgO/γ-Al2O3 catalyst under the optimized reaction conditions in the fixed bed reactor, outperforming most of the reported catalysts.
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Affiliation(s)
- Fengjiao Li
- Shenzhen Automotive Research Institute, Beijing Institute of Technology Shenzhen 518118 Guangdong China
- College of Chemistry and Environmental Engineering, Shenzhen University Shenzhen 518060 Guangdong China
| | - Liguo Wang
- Key Laboratory for Green Process and Engineering, National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Institute of Process Engineering, Chinese Academy of Sciences Beijing 100190 China
| | - Shuang Xu
- Key Laboratory for Green Process and Engineering, National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Institute of Process Engineering, Chinese Academy of Sciences Beijing 100190 China
| | - Shuting Liang
- College of Chemical and Environmental Engineering, Chongqing University of Arts and Sciences Yongchuan Chongqing 402160 China
| | - Ningning Zhang
- Shenzhen Automotive Research Institute, Beijing Institute of Technology Shenzhen 518118 Guangdong China
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Jia B, Sun X, Chen M, Jian J, You K, Luo H, Huang Y, Luo X, Jin B, Wang N, Liang Z. Selective preparation and reaction kinetics of dimethyl carbonate from alcoholysis of methyl carbamate with methanol over ZnAl-LDO. REACT CHEM ENG 2021. [DOI: 10.1039/d1re00158b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Possible reaction mechanism of synthesis of DMC from MC and methanol over the ZnAl-LDO catalyst.
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Affiliation(s)
- Bo Jia
- College of Chemistry and Chemical Engineering, The Engineering Research Center of Advanced Catalysis, Ministry of Education, Hunan University, Changsha 410082, P. R. China
| | - Xiaoyu Sun
- College of Chemistry and Chemical Engineering, The Engineering Research Center of Advanced Catalysis, Ministry of Education, Hunan University, Changsha 410082, P. R. China
| | - Ming Chen
- College of Chemistry and Chemical Engineering, The Engineering Research Center of Advanced Catalysis, Ministry of Education, Hunan University, Changsha 410082, P. R. China
| | - Jian Jian
- College of Chemical Engineering, Xiangtan University, Xiangtan 411105, P. R. China
| | - Kuiyi You
- College of Chemical Engineering, Xiangtan University, Xiangtan 411105, P. R. China
| | - He'an Luo
- College of Chemical Engineering, Xiangtan University, Xiangtan 411105, P. R. China
| | - Yangqiang Huang
- College of Chemistry and Chemical Engineering, The Engineering Research Center of Advanced Catalysis, Ministry of Education, Hunan University, Changsha 410082, P. R. China
| | - Xiao Luo
- College of Chemistry and Chemical Engineering, The Engineering Research Center of Advanced Catalysis, Ministry of Education, Hunan University, Changsha 410082, P. R. China
| | - Bo Jin
- College of Chemistry and Chemical Engineering, The Engineering Research Center of Advanced Catalysis, Ministry of Education, Hunan University, Changsha 410082, P. R. China
| | - Nailiang Wang
- State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University, Yinchuan 750000, P. R. China
| | - Zhiwu Liang
- College of Chemistry and Chemical Engineering, The Engineering Research Center of Advanced Catalysis, Ministry of Education, Hunan University, Changsha 410082, P. R. China
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Tao N, Liu J, Xu Y, Feng Y, Wang Y, Liu W, Wang H, Lv J. Highly selective and stable ZrO2–Al2O3 for synthesis of dimethyl carbonate in reactive distillation. CHEMICAL PAPERS 2020. [DOI: 10.1007/s11696-020-01185-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Li S, Wang D, Wu X, Chen Y. Recent advance on VOCs oxidation over layered double hydroxides derived mixed metal oxides. CHINESE JOURNAL OF CATALYSIS 2020. [DOI: 10.1016/s1872-2067(19)63446-7] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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