用锡改性沸石以合成用于丙烷脱氢的 Pt-Sn/MFI 催化剂

IF 1.3 4区 工程技术 Q3 CHEMISTRY, ORGANIC Petroleum Chemistry Pub Date : 2024-09-16 DOI:10.1134/s096554412404008x
A. B. Ponomaryov, A. V. Smirnov, M. V. Shostakovsky, E. V. Pisarenko, A. G. Popov, M. A. Kashkina
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引用次数: 0

摘要

摘要 用锡改性 MFI 型沸石,包括用过量 NaCl 中的 SnCl2 溶液浸渍沸石、煅烧(固定氧化锡)和水洗(去除过量 NaCl)。将铂负载在锡改性的载体上,可产生一种高活性(每摩尔铂每秒产生 5-10 摩尔 C3H6)、选择性(96-98% 对丙烯)和稳定的丙烷脱氢催化剂。由于作为铂锚的锡高度分散,铂的平均粒径为 1.2 纳米。锡的分散不仅得益于其前驱体与氯化钠的分子稀释,还得益于煅烧过程中形成的挥发性 SnCl4 使锡在表面重新分散。
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Modification of Zeolites with Tin to Synthesize Pt–Sn/MFI Catalysts for Propane Dehydrogenation

Abstract

Modification of MFI-type zeolites with tin involves impregnating the zeolite with an SnCl2 solution in excess NaCl, calcination (to fix the tin oxide), and water washing (to remove excess NaCl). Loading platinum on the tin-modified support results in a highly active (5–10 mol of C3H6 per mol of Pt per second), selective (96–98% towards propylene), and stable catalyst for dehydrogenation of propane. Due to the high dispersion of tin, which serves as an anchor for platinum, the average Pt particle size is 1.2 nm. The dispersion of tin is facilitated not only by the molecular dilution of its precursor with sodium chloride but also by the redispersion of tin across the surface due to the formation of volatile SnCl4 during calcination.

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来源期刊
Petroleum Chemistry
Petroleum Chemistry 工程技术-工程:化工
CiteScore
2.50
自引率
21.40%
发文量
102
审稿时长
6-12 weeks
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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