E. S. Mammadov, T. O. Gahramanov, N. F. Akhmedova, S. E. Mammadov, A. Z. Mamedova, E. I. Ahmadov
{"title":"稀土金属（Pr、Yb、Ho）的类型和负载对 HTsVM 沸石在甲苯乙化中的对位选择性的影响","authors":"E. S. Mammadov, T. O. Gahramanov, N. F. Akhmedova, S. E. Mammadov, A. Z. Mamedova, E. I. Ahmadov","doi":"10.1134/S0965544124010134","DOIUrl":null,"url":null,"abstract":"<p>The study describes toluene ethylation using TsVM zeolite (SiO<sub>2</sub>/Al<sub>2</sub>O<sub>3</sub> = 40) and a series of TsVM-based catalysts modified with rare-earth metals. To investigate the effects of the type and loading of rare-earth metals in the HTsVM catalyst on the selectivity towards total ethyltoluenes and <i>p</i>-ethyltoluene, the reaction was carried out in a continuous-flow fixed-bed reactor at atmospheric pressure and temperatures of 300–400°C. The HTsVM was modified with praseodymium, ytterbium, and holmium nitrates. The physicochemical and textural properties of the catalysts were characterized by XRD, FTIR spectroscopy, NH<sub>3</sub>-TPD, and low-temperature nitrogen adsorption. The specific surface area, acidity, total pore volume, and mesopore volume were found to decrease with an increase in the holmium loading of the catalyst. The zeolite catalysts loaded with 4.0–5.0 wt % Ho exhibited optimum stability and high <i>p</i>-ethyltoluene selectivity (79.5–81.4%) in combination with adequate toluene conversion (19.4–20.3%).</p>","PeriodicalId":725,"journal":{"name":"Petroleum Chemistry","volume":"64 2","pages":"258 - 266"},"PeriodicalIF":1.3000,"publicationDate":"2024-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Effects of the Type and Loading of Rare-Earth Metals (Pr, Yb, Ho) on the para-Selectivity of HTsVM Zeolite in Toluene Ethylation\",\"authors\":\"E. S. Mammadov, T. O. Gahramanov, N. F. Akhmedova, S. E. Mammadov, A. Z. Mamedova, E. I. Ahmadov\",\"doi\":\"10.1134/S0965544124010134\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>The study describes toluene ethylation using TsVM zeolite (SiO<sub>2</sub>/Al<sub>2</sub>O<sub>3</sub> = 40) and a series of TsVM-based catalysts modified with rare-earth metals. To investigate the effects of the type and loading of rare-earth metals in the HTsVM catalyst on the selectivity towards total ethyltoluenes and <i>p</i>-ethyltoluene, the reaction was carried out in a continuous-flow fixed-bed reactor at atmospheric pressure and temperatures of 300–400°C. The HTsVM was modified with praseodymium, ytterbium, and holmium nitrates. The physicochemical and textural properties of the catalysts were characterized by XRD, FTIR spectroscopy, NH<sub>3</sub>-TPD, and low-temperature nitrogen adsorption. The specific surface area, acidity, total pore volume, and mesopore volume were found to decrease with an increase in the holmium loading of the catalyst. The zeolite catalysts loaded with 4.0–5.0 wt % Ho exhibited optimum stability and high <i>p</i>-ethyltoluene selectivity (79.5–81.4%) in combination with adequate toluene conversion (19.4–20.3%).</p>\",\"PeriodicalId\":725,\"journal\":{\"name\":\"Petroleum Chemistry\",\"volume\":\"64 2\",\"pages\":\"258 - 266\"},\"PeriodicalIF\":1.3000,\"publicationDate\":\"2024-05-14\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Petroleum Chemistry\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://link.springer.com/article/10.1134/S0965544124010134\",\"RegionNum\":4,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"CHEMISTRY, ORGANIC\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Petroleum Chemistry","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1134/S0965544124010134","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, ORGANIC","Score":null,"Total":0}
Effects of the Type and Loading of Rare-Earth Metals (Pr, Yb, Ho) on the para-Selectivity of HTsVM Zeolite in Toluene Ethylation
The study describes toluene ethylation using TsVM zeolite (SiO2/Al2O3 = 40) and a series of TsVM-based catalysts modified with rare-earth metals. To investigate the effects of the type and loading of rare-earth metals in the HTsVM catalyst on the selectivity towards total ethyltoluenes and p-ethyltoluene, the reaction was carried out in a continuous-flow fixed-bed reactor at atmospheric pressure and temperatures of 300–400°C. The HTsVM was modified with praseodymium, ytterbium, and holmium nitrates. The physicochemical and textural properties of the catalysts were characterized by XRD, FTIR spectroscopy, NH3-TPD, and low-temperature nitrogen adsorption. The specific surface area, acidity, total pore volume, and mesopore volume were found to decrease with an increase in the holmium loading of the catalyst. The zeolite catalysts loaded with 4.0–5.0 wt % Ho exhibited optimum stability and high p-ethyltoluene selectivity (79.5–81.4%) in combination with adequate toluene conversion (19.4–20.3%).
期刊介绍：
Petroleum Chemistry (Neftekhimiya), founded in 1961, offers original papers on and reviews of theoretical and experimental studies concerned with current problems of petroleum chemistry and processing such as chemical composition of crude oils and natural gas liquids; petroleum refining (cracking, hydrocracking, and catalytic reforming); catalysts for petrochemical processes (hydrogenation, isomerization, oxidation, hydroformylation, etc.); activation and catalytic transformation of hydrocarbons and other components of petroleum, natural gas, and other complex organic mixtures; new petrochemicals including lubricants and additives; environmental problems; and information on scientific meetings relevant to these areas.
Petroleum Chemistry publishes articles on these topics from members of the scientific community of the former Soviet Union.
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