دانلود رایگان مقاله لاتین هیدروژن زدایی پروپان از سایت الزویر
عنوان فارسی مقاله:
هیدروژن زدایی پروپان PranNa - SUZ- 4 کاتالیزشده
عنوان انگلیسی مقاله:
PtSnNa@SUZ-4-catalyzed propane dehydrogenation
سال انتشار : 2016
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مقدمه انگلیسی مقاله:
1. Introduction
Bimetallic platinum-tin (Pt-Sn)-based catalysts have attracted much attention for their industrial application potential in recent years. [1–3]. They have been widely employed in many reactions, such as light paraffin dehydrogenation [1,4,5], alcohol oxidation [6,7] and the hydrogenation for carbonyl compounds [8,9] et al. Among these applications, dehydrogenation of propane to produce propylene is a significant petrochemical process for the rapidly increasing demand of propylene [10,11]. However, current reaction conditions suffer high temperature and low H2 partial pressure, which leads to undesirable thermal cracking reactions to coke and light alkanes and results in low product yield and eventually deactivation of the catalyst [11–13]. Therefore, developing an efficient catalyst with high activity, high stability and high propylene selectivity is urgently required. The conventionally employed PtSn/-Al2O3 is considered to be one of the most efficient catalysts for propane dehydrogenation, but is deficiency for their poor stability and weak durability after recoveries [10,14,15]. To resolve the problem, additives, including alkali metals (K, Na) and rare earth metals (La, Ce) have been employed to improve the catalysts [14,16–18].Yet, zeolite has been used as support for Pt-Sn-based catalysts owing to its high surface area, high thermal stability and tunable Si/Al ratio [3]. Among these materials, SUZ-4 is a novel zeolite patented by the British Petroleum Company in 1992. The three dimensional topological structure of this material has straight tenmembered channels intersected by two eight-membered channels at an angle of about 74◦, similar to that of ZSM-5 zeolite [19–21]. HSUZ-4 zeolite possess large amount of Brönsted acid sites stronger than those on H-ZSM-5 zeolite [22]. Therefore, it has presented considerably high catalytic activity in many reactions, such as conversion of n-hexane [20], the synthesis of dimethyl ether from methanol [23], and the elimination of nitrogen oxides [22,24]. SUZ-4 zeolite-supported catalysts might be employed in propane dehydrogenation. But up to present, few studies have been reported in the field while the ZSM-5-supported catalysts have attracted much attention. Compared with -Al2O3, ZSM-5 zeolite possesses a special three dimensional topological structure, which can inhibit the production of large hydrocarbon molecules to suppress the coke deposits and enhance the catalyst stability [25]. Recently, Zhou et. al investigated the effect of promoters of PtSn/ZSM-5 catalyst for propane dehydrogenation and found that introduction of the third or fourth promoter (K, La) could improve the catalyst activity by decreasing the acid sites of the support and strengthening the interaction between Sn and the carrier [26,27]. In this paper, we employed SUZ-4 zeolite-supported PtSn catalysts in propane dehydrogenation with sodium ion as the additive to improve the catalyst. The effects of sodium ion addition were carefully invesh
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کلمات کلیدی:
PtSnNa@SUZ-4-catalyzed propane dehydrogenation - ResearchGate https://www.researchgate.net/.../306530405_PtSnNaSUZ-4-catalyzed_propane_dehydro... Dec 1, 2016 - PtSnNa@SUZ-4-catalyzed propane dehydrogenation on ResearchGate, the professional network for scientists. PtSnNa/SUZ-4: An efficient catalyst for propane dehydrogenation www.cjcatal.org/EN/Y2017/V38/I3/529 Feb 13, 2017 - It has been shown that SUZ-4-supported PtSnNa (PtSnNa/SUZ-4) was determined to be ... Chinese Journal of Catalysis, 2017, 38(3): 529-536. [PDF]PtSnNa/SUZ-4: An efficient catalyst for propane ... - 催化学报 www.chxb.cn/CN/article/downloadArticleFile.do?attachType... Translate this page by H Zhou - 2017 Mar 5, 2017 - Chinese Journal of Catalysis 38 (2017) 529–536 ... ZSM‐5‐supported catalysts, Pt particles on the PtSnNa/SUZ‐4 are primarily dispersed over ... Ethanol Electro-Oxidation on Ternary Platinum ... - ACS Publications pubs.acs.org/doi/abs/10.1021/cs500147p by N Erini - 2014 - Cited by 25 - Related articles Apr 25, 2014 - ACS Catal. , 2014, 4 (6), pp 1859–1867. DOI: 10.1021/cs500147p .... PtSnNa@SUZ-4-catalyzed propane dehydrogenation. Hualan Zhou ... Ethanol Electro-Oxidation on Ternary Platinum ... - ACS Publications pubs.acs.org/doi/abs/10.1021/cs500147p?src=recsys Apr 25, 2014 - ACS Catal. , 2014, 4 (6), pp 1859–1867. DOI: 10.1021/cs500147p ... PtSnNa@SUZ-4-catalyzed propane dehydrogenation. Hualan Zhou ... Recent Chinese Journal of Catalysis Articles - Elsevier https://www.journals.elsevier.com/chinese-journal-of-catalysis/recent-articles Recently published articles from Chinese Journal of Catalysis. ... PtSnNa/SUZ-4: An efficient catalyst for propane dehydrogenation. March 2017. Hualan Zhou ... Applied Catalysis A, General (v.527, #C) | www.chemweb.com https://www.chemweb.com/articles/0926860X/0527000C The experimental results showed that PtSnNa/SUZ-4 catalysts exhibited high durability, high propylene selectivity and high stability with adequate sodium ion ...
