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Cao Q, Lin Y, Li Y, Tian J, Liu H, Zhu T, Wang J. Hydrolysis of Carbonyl Sulfide in Blast Furnace Gas Using Alkali Metal-Modified γ-Al 2O 3 Catalysts with High Sulfur Resistance. ACS OMEGA 2023; 8:35608-35618. [PMID: 37810668 PMCID: PMC10552084 DOI: 10.1021/acsomega.3c01811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Accepted: 07/03/2023] [Indexed: 10/10/2023]
Abstract
A carbonyl sulfide (COS) hydrolysis catalyst can play an efficient role in blast furnace gas (BFG), but the life of the catalyst is greatly shortened due to the presence of O2 and H2S in the atmosphere, so improving the sulfur resistance of the catalyst is the key to application. In this work, alkali metals Na and K modified γ-Al2O3 catalysts to improve COS hydrolysis efficiency and sulfur resistance by adding an alkaline center. Compared with γ-Al2O3 catalysts, the COS hydrolysis efficiency of the modified catalysts in the experiment was improved by 12% in the presence of H2S and O2. The main cause of catalyst sulfur poisoning is the presence of O2, which intensifies both the total amount of sulfur deposition and the proportion of sulfate. It is found that the NaOH/Al2O3 catalyst shows better sulfur resistance than the KOH/Al2O3 catalyst for two reasons: first, the support of Na can significantly improve the medium-strong alkaline site, which is the adsorption site of H2S. This is equivalent to increasing the "sulfur capacity" of H2S adsorption and reducing the impact of sulfur deposition on the main reaction. Second, the elemental sulfur is more easily produced on the NaOH/Al2O3 catalyst, but the sulfur is further oxidized to sulfate and sulfite on the KOH/Al2O3 catalyst. The molecular diameter of elemental sulfur is smaller than that of sulfate. Therefore, the NaOH/Al2O3 catalyst has better sulfur resistance.
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Affiliation(s)
- Qiang Cao
- State
Key Laboratory of Clean and Efficient Coal Utilization, Taiyuan University of Technology, Taiyuan 030024, China
- CAS
Key Laboratory of Green Process and Engineering, Institute of Process
Engineering, Innovation Academy for Green Manufacture, Chinese Academy of Sciences, Beijing 100190, China
| | - Yuting Lin
- CAS
Key Laboratory of Green Process and Engineering, Institute of Process
Engineering, Innovation Academy for Green Manufacture, Chinese Academy of Sciences, Beijing 100190, China
| | - Yuran Li
- CAS
Key Laboratory of Green Process and Engineering, Institute of Process
Engineering, Innovation Academy for Green Manufacture, Chinese Academy of Sciences, Beijing 100190, China
| | - Jinglei Tian
- HBIS
Group Co., Ltd., Shijiazhuang 050023, China
| | | | - Tingyu Zhu
- CAS
Key Laboratory of Green Process and Engineering, Institute of Process
Engineering, Innovation Academy for Green Manufacture, Chinese Academy of Sciences, Beijing 100190, China
| | - Jiancheng Wang
- State
Key Laboratory of Clean and Efficient Coal Utilization, Taiyuan University of Technology, Taiyuan 030024, China
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Hu XM, Zhang R, Dong H, Jia YY, Bao GQ, Wang PA. Chiral bifunctional organocatalysts for enantioselective synthesis of 3-substituted isoindolinones. RSC Adv 2023; 13:24460-24465. [PMID: 37588978 PMCID: PMC10425721 DOI: 10.1039/d3ra04350a] [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: 06/29/2023] [Accepted: 08/07/2023] [Indexed: 08/18/2023] Open
Abstract
A series of chiral bifunctional organocatalysts were prepared and used for enantioselective synthesis of 3-substituted isoindolinones from 2-formylarylnitriles and malonates through aldol-cyclization rearrangement tandem reaction in excellent yields and enantioselectivites (up to 87% yield and 95% ee) without recrystallization. In this investigation, we found that chiral tertiary-amine catalysts with a urea group can afford 3-substituted isoindolinones both in higher yields (87% vs. 77%) and enantioselectivities (95% ee vs. 46% ee) than chiral bifunctional phase-transfer catalysts.
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Affiliation(s)
- Xiao-Mu Hu
- School of Pharmacy, The Fourth Military Medical University Xi'an 710032 China
- Department of Pharmacy, The 900 Hosipital of PLA Fuzhou Fujian China
| | - Rui Zhang
- School of Pharmacy, The Fourth Military Medical University Xi'an 710032 China
| | - Hai Dong
- School of Pharmacy, The Fourth Military Medical University Xi'an 710032 China
| | - Yan-Yan Jia
- Department of Pharmacy, Xijing Hospital, The Fourth Military Medical University Xi'an 710032 China
| | - Guo-Qiang Bao
- Department of General Surgery, Tangdu Hospital, The Fourth Military Medical University Xi'an 710038 China
| | - Ping-An Wang
- School of Pharmacy, The Fourth Military Medical University Xi'an 710032 China
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Samanta S, Ali SA, Bera A, Giri S, Samanta K. Transition metal-free advanced synthetic approaches for isoindolinones and their fused analogues. NEW J CHEM 2022. [DOI: 10.1039/d2nj00475e] [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
The transition metal-free synthetic protocols of isoindolinone and its fused analogues are highlighted in this review since 2007 to 2021.
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Affiliation(s)
| | - Sk Asraf Ali
- Department of Chemistry, Bidhannagar College, Kolkata 700064, India
| | - Anirban Bera
- Department of Chemistry, Bidhannagar College, Kolkata 700064, India
| | - Soumen Giri
- Department of Chemistry, C.V. Raman Global University, Bhubaneswar 752054, India
| | - Khokan Samanta
- Department of Chemistry, Haldia Government College, Haldia, India
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