Jiangnan Xiang, Wei Zhang, Yuting Wang, Haiying Lu, Yan Wang, Weijiong Dai, Binbin Fan, Jiajun Zheng, Jinghong Ma, Ruifeng Li
{"title":"利用莫来石-ZSM-22 复合沸石调节正十二烷加氢异构化的异构体分布","authors":"Jiangnan Xiang, Wei Zhang, Yuting Wang, Haiying Lu, Yan Wang, Weijiong Dai, Binbin Fan, Jiajun Zheng, Jinghong Ma, Ruifeng Li","doi":"10.1016/j.fuproc.2024.108140","DOIUrl":null,"url":null,"abstract":"<div><div>Mordenite-ZSM-22 composite zeolite is prepared by the physical mixing. The structure, pore properties, acid properties and diffusion properties of samples are characterized by the means of XRD, N<sub>2</sub> physical adsorption-desorption, SEM, TEM, NH<sub>3</sub>-TPD, Py-IR, and ZLC. The pore properties and acid properties of mordenite-ZSM-22 composite zeolite can be efficiently modulated by changing mass ratio of mordenite and ZSM-22. In <em>n</em>-C<sub>12</sub> hydroisomerization reaction, Pt/HMZ-<em>x</em> displays great capacity in modulate <em>n</em>-dodecane isomers distribution (mono-branched <em>i</em>-C<sub>12</sub>, multi-branched <em>i</em>-C<sub>12</sub>, terminal branched <em>i</em>-C<sub>12</sub> and central branched <em>i</em>-C<sub>12</sub>), these results are ascribed to that these composite zeolite catalysts combined the topology structure advantage of mordenite and ZSM-22. When reaction temperature is 280 °C, the ratio of mono-branched <em>i</em>-C<sub>12</sub> selectivity to multi-branched <em>i</em>-C<sub>12</sub> selectivity (S<sub>MB</sub>/S<sub>MTB</sub>) of Pt/HZSM-22, Pt/HMZ-1, Pt/HMZ-3, Pt/HMZ-5 and Pt/HMOR were 37.64, 15.04, 5.48, 5.20 and 1.47, respectively. The ZLC diffusion experiment results indicate that low isomer selectivity of Pt/HMOR is due to its poor diffusivity. On the contrary, Pt/HZSM-22 favors the diffusion of reactants and has better catalytic performance.</div></div>","PeriodicalId":326,"journal":{"name":"Fuel Processing Technology","volume":"264 ","pages":"Article 108140"},"PeriodicalIF":7.2000,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Modulating isomers distribution of n-dodecane hydroisomerization by mordenite-ZSM-22 composite zeolite\",\"authors\":\"Jiangnan Xiang, Wei Zhang, Yuting Wang, Haiying Lu, Yan Wang, Weijiong Dai, Binbin Fan, Jiajun Zheng, Jinghong Ma, Ruifeng Li\",\"doi\":\"10.1016/j.fuproc.2024.108140\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Mordenite-ZSM-22 composite zeolite is prepared by the physical mixing. The structure, pore properties, acid properties and diffusion properties of samples are characterized by the means of XRD, N<sub>2</sub> physical adsorption-desorption, SEM, TEM, NH<sub>3</sub>-TPD, Py-IR, and ZLC. The pore properties and acid properties of mordenite-ZSM-22 composite zeolite can be efficiently modulated by changing mass ratio of mordenite and ZSM-22. In <em>n</em>-C<sub>12</sub> hydroisomerization reaction, Pt/HMZ-<em>x</em> displays great capacity in modulate <em>n</em>-dodecane isomers distribution (mono-branched <em>i</em>-C<sub>12</sub>, multi-branched <em>i</em>-C<sub>12</sub>, terminal branched <em>i</em>-C<sub>12</sub> and central branched <em>i</em>-C<sub>12</sub>), these results are ascribed to that these composite zeolite catalysts combined the topology structure advantage of mordenite and ZSM-22. When reaction temperature is 280 °C, the ratio of mono-branched <em>i</em>-C<sub>12</sub> selectivity to multi-branched <em>i</em>-C<sub>12</sub> selectivity (S<sub>MB</sub>/S<sub>MTB</sub>) of Pt/HZSM-22, Pt/HMZ-1, Pt/HMZ-3, Pt/HMZ-5 and Pt/HMOR were 37.64, 15.04, 5.48, 5.20 and 1.47, respectively. The ZLC diffusion experiment results indicate that low isomer selectivity of Pt/HMOR is due to its poor diffusivity. On the contrary, Pt/HZSM-22 favors the diffusion of reactants and has better catalytic performance.</div></div>\",\"PeriodicalId\":326,\"journal\":{\"name\":\"Fuel Processing Technology\",\"volume\":\"264 \",\"pages\":\"Article 108140\"},\"PeriodicalIF\":7.2000,\"publicationDate\":\"2024-10-10\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Fuel Processing Technology\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0378382024001103\",\"RegionNum\":2,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, APPLIED\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Fuel Processing Technology","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0378382024001103","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, APPLIED","Score":null,"Total":0}
Modulating isomers distribution of n-dodecane hydroisomerization by mordenite-ZSM-22 composite zeolite
Mordenite-ZSM-22 composite zeolite is prepared by the physical mixing. The structure, pore properties, acid properties and diffusion properties of samples are characterized by the means of XRD, N2 physical adsorption-desorption, SEM, TEM, NH3-TPD, Py-IR, and ZLC. The pore properties and acid properties of mordenite-ZSM-22 composite zeolite can be efficiently modulated by changing mass ratio of mordenite and ZSM-22. In n-C12 hydroisomerization reaction, Pt/HMZ-x displays great capacity in modulate n-dodecane isomers distribution (mono-branched i-C12, multi-branched i-C12, terminal branched i-C12 and central branched i-C12), these results are ascribed to that these composite zeolite catalysts combined the topology structure advantage of mordenite and ZSM-22. When reaction temperature is 280 °C, the ratio of mono-branched i-C12 selectivity to multi-branched i-C12 selectivity (SMB/SMTB) of Pt/HZSM-22, Pt/HMZ-1, Pt/HMZ-3, Pt/HMZ-5 and Pt/HMOR were 37.64, 15.04, 5.48, 5.20 and 1.47, respectively. The ZLC diffusion experiment results indicate that low isomer selectivity of Pt/HMOR is due to its poor diffusivity. On the contrary, Pt/HZSM-22 favors the diffusion of reactants and has better catalytic performance.
期刊介绍：
Fuel Processing Technology (FPT) deals with the scientific and technological aspects of converting fossil and renewable resources to clean fuels, value-added chemicals, fuel-related advanced carbon materials and by-products. In addition to the traditional non-nuclear fossil fuels, biomass and wastes, papers on the integration of renewables such as solar and wind energy and energy storage into the fuel processing processes, as well as papers on the production and conversion of non-carbon-containing fuels such as hydrogen and ammonia, are also welcome. While chemical conversion is emphasized, papers on advanced physical conversion processes are also considered for publication in FPT. Papers on the fundamental aspects of fuel structure and properties will also be considered.
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