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Moslempour Z, Sadighi S, Dashti A, Ahmadpour A. Investigating the properties and performance of 3A molecular sieves as an adsorbent to prevent coke formation in olefin dehydration process. INTERNATIONAL JOURNAL OF CHEMICAL REACTOR ENGINEERING 2021. [DOI: 10.1515/ijcre-2021-0179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
To study the affinity of 3A aluminosilicate adsorbents to prevent oligomerization of olefin molecules and forming green oil, physical and chemical properties of 3A molecular sieves are measured by using characterization techniques such as temperature-programmed desorption (TPD), nitrogen (N2) and water adsorptions, X-ray diffraction (XRD), X-ray fluorescence (XRF), crushing strength, and carbon dioxide (CO2) adsorption. Moreover, coke formation affinities of the understudy adsorbents are evaluated in a bench-scale system using 1-butene and 1,3-butadiene at temperatures of 220 and 260 °C, and outcomes are validated against the actual data gathered from an industrial scale olefin dehydration plant. Results confirm that the type of binder and the amount of ion exchange affect the performance of a 3A molecular sieve nominated for dehydrating olefinic streams. The binder with the least amount of acidity is preferred, and at least 35% of Na ions of the 4A zeolite should be exchanged with K ions to make it applicable for synthesizing an appropriate 3A molecular sieve. Furthermore, to control the oligomerization and inhibit green oil formation, the CO2 adsorption and acidity of Trisiv shape molecular sieves with the sizes of 1/4 inch should be less than 0.5 wt % and 1.7 mmol NH3/g, respectively. For extrudate shape with the sizes of 1/16 inch CO2 adsorption and acidity should be less than 0.2 wt % and 2.2 mmol NH3/g, respectively.
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Affiliation(s)
- Zoya Moslempour
- Department of Chemical Engineering , Faculty of Engineering, Ferdowsi University of Mashhad , Azadi Sq., P.O. 9177948944 , Mashhad , Iran
- Research Laboratory of Polymer Testing (RPT Lab.) , Research Institute of Oil & Gas, Ferdowsi University of Mashhad , Azadi Sq. , Mashhad , Iran
| | - Sepehr Sadighi
- Catalysis Development Technologies Division , Research Institute of Petroleum Industry (RIPI) , West Side of Azadi Complex, P.O. Box 1485733111 , Tehran , Iran
| | - Ali Dashti
- Department of Chemical Engineering , Faculty of Engineering, Ferdowsi University of Mashhad , Azadi Sq., P.O. 9177948944 , Mashhad , Iran
- Research Laboratory of Polymer Testing (RPT Lab.) , Research Institute of Oil & Gas, Ferdowsi University of Mashhad , Azadi Sq. , Mashhad , Iran
| | - Ali Ahmadpour
- Department of Chemical Engineering , Faculty of Engineering, Ferdowsi University of Mashhad , Azadi Sq., P.O. 9177948944 , Mashhad , Iran
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Ahmad A, Naqvi SR, Rafique M, Nasir H, Sarosh A. Synthesis, characterization and catalytic testing of MCM-22 derived catalysts for n-hexane cracking. Sci Rep 2020; 10:21786. [PMID: 33311591 PMCID: PMC7733465 DOI: 10.1038/s41598-020-78746-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Accepted: 11/30/2020] [Indexed: 11/21/2022] Open
Abstract
Layered zeolites and their delaminated structures are novel materials that enhance the catalytic performance of catalysts by addressing diffusion limitations of the reactant molecules. n-Hexane catalytic cracking was observed over MCM-22 layered zeolite and its derivative structures over the temperature range of 450–650 °C for the production of olefins. MCM-22, H-MCM-22, and ITQ-2 zeolites were prepared by the hydrothermal method. Oxalic acid was used as a dealuminating reagent to obtain H-MCM-22 with various Si/Al ratios ranging from 09–65. The prepared samples were characterized by XRD, SEM, TGA, and BET. The cracking of n-hexane was carried out by Pyro/GC–MS. It was observed that the selectivity for olefins was improved by increasing the Si/Al ratio. H-MCM-22–10% produced the highest relative olefinic concentration of 68% as compared to other dealuminated structures. Moreover, the product distribution showed that higher reaction temperature is favorable to produce more olefins. Furthermore, a comparison between ITQ-2 and MCM-22 derived structures showed that ITQ-2 is more favorable for olefins production at high temperatures. The concentration of relative olefins was increased up to 80% over ITQ-2 at 650 °C.
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Affiliation(s)
- Ali Ahmad
- School of Chemical and Materials Engineering, National University of Sciences and Technology, H-12, Islamabad, 44000, Pakistan.,Department of Chemical Engineering, University of Gujrat, Hafiz Hayat Campus, Gujrat, Pakistan
| | - Salman Raza Naqvi
- School of Chemical and Materials Engineering, National University of Sciences and Technology, H-12, Islamabad, 44000, Pakistan
| | | | - Habib Nasir
- Department of Chemistry, School of Natural Sciences, National University of Sciences and Technology, H-12, Islamabad, 44000, Pakistan.
| | - Ali Sarosh
- Muhammad Nawaz Sharif University of Engineering and Technology (MNS-UET), Multan, Pakistan
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Hajimirzaee S, Soleimani Mehr A, Kianfar E. Modified ZSM-5 Zeolite for Conversion of LPG to Aromatics. Polycycl Aromat Compd 2020. [DOI: 10.1080/10406638.2020.1833048] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Saeed Hajimirzaee
- Faculty of Science and Engineering, Manchester Metropolitan University, Manchester, UK
| | | | - Ehsan Kianfar
- Department of Chemical Engineering, Arak Branch, Islamic Azad University, Arak, Iran
- Young Researchers and Elite Club, Gachsaran Branch, Islamic Azad University, Gachsaran, Iran
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Wang P, Chen L, Guo JK, Shen S, Au CT, Yin SF. Synthesis of Submicron-Sized SAPO-34 as Efficient Catalyst for Olefin Generation from CH 3Br. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b04315] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Peng Wang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan Provincial Key Laboratory for Cost-effective Utilization of Fossil Fuel Aimed at Reducing Carbon-dioxide Emissions, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, Hunan, China
| | - Lang Chen
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan Provincial Key Laboratory for Cost-effective Utilization of Fossil Fuel Aimed at Reducing Carbon-dioxide Emissions, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, Hunan, China
| | - Jun-Kang Guo
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan Provincial Key Laboratory for Cost-effective Utilization of Fossil Fuel Aimed at Reducing Carbon-dioxide Emissions, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, Hunan, China
| | - Sheng Shen
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan Provincial Key Laboratory for Cost-effective Utilization of Fossil Fuel Aimed at Reducing Carbon-dioxide Emissions, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, Hunan, China
| | - Chak-Tong Au
- College of Chemistry and Chemical Engineering, Hunan Institute of Engineering, Xiangtan 411104, Hunan, China
| | - Shuang-Feng Yin
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan Provincial Key Laboratory for Cost-effective Utilization of Fossil Fuel Aimed at Reducing Carbon-dioxide Emissions, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, Hunan, China
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Li J, Liu M, Li S, Guo X, Song C. Influence of Diffusion and Acid Properties on Methane and Propane Selectivity in Methanol-to-Olefins Reaction. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.8b03969] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Junjie Li
- State Key Laboratory of Fine Chemicals, PSU-DUT Joint Center for Energy Research, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, P. R. China
| | - Min Liu
- State Key Laboratory of Fine Chemicals, PSU-DUT Joint Center for Energy Research, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, P. R. China
| | - Shanshan Li
- State Key Laboratory of Fine Chemicals, PSU-DUT Joint Center for Energy Research, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, P. R. China
| | - Xinwen Guo
- State Key Laboratory of Fine Chemicals, PSU-DUT Joint Center for Energy Research, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, P. R. China
| | - Chunshan Song
- State Key Laboratory of Fine Chemicals, PSU-DUT Joint Center for Energy Research, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, P. R. China
- Department of Energy and Mineral Engineering, EMS Energy Institute, PSU-DUT Joint Center for Energy Research, Pennsylvania State University, University Park, Pennsylvania 16802, United States
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Wang Y, Yokoi T, Namba S, Kondo JN, Tatsumi T. Improvement of catalytic performance of MCM-22 in the cracking of n-hexane by controlling the acidic property. J Catal 2016. [DOI: 10.1016/j.jcat.2015.10.011] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Selective Production of Light Olefins from Catalytic Cracking of n-Hexane over OSDA-Free Beta Zeolites. CATALYSIS SURVEYS FROM ASIA 2015. [DOI: 10.1007/s10563-015-9202-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Patrick F, Sugunan S. Cracking of cumene on tungsten promoted ceria catalysts. REACTION KINETICS MECHANISMS AND CATALYSIS 2011. [DOI: 10.1007/s11144-011-0309-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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