Mechanistic studies of lower temperature isomerization of n-heptane over fibrous silica molybdenum catalyst

被引：10

作者：

Bahari, M. B. ^{[4
]}

Jalil, A. A. ^{[1
,2
,3
]}

Mamat, C. R. ^{[4
]}

Razak, M. H. ^{[1
]}

Izzudin, N. M. ^{[1
]}

Aziz, M. A. ^{[1
]}

Khusnun, N. F. ^{[2
]}

Aziz, M. A. H. ^{[4
]}

Rahman, A. F. A. ^{[1
]}

Nabgan, W. ^{[5
]}

Rajendran, Saravanan ^{[6
]}

机构：

[1] Univ Teknol Malaysia, Fac Chem & Energy Engn, Utm Johar Bahru 81310, Johor, Malaysia

[2] Univ Teknol Malaysia, Inst Future Energy, Ctr Hydrogen Energy, Utm Johar Bahru 81310, Johor, Malaysia

[3] Saveetha Inst Med & Tech Sci, Saveetha Sch Engn, Chennai 60210, Tamil Nadu, India

[4] Univ Teknol Malaysia, Fac Sci, Utm Johar Bahru 81310, Johor, Malaysia

[5] Univ Rovira & Virgili, Dept Engn Quim, Ave Paisos Catalans 26, Tarragona 43007, Spain

[6] Univ Tarapaca, Fac Ingn, Dept Ingn Mecan, Avda Gen Velasquez 1775, Arica, Chile

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2024年 / 54卷

关键词：

n-C-7; isomerization; MoO3-Based catalysts; Platinum; Lewis acid; Protonic acid side; ENHANCED PHOTODEGRADATION; H-2-REDUCED PT/MOO3; HYDROISOMERIZATION; HYDROGEN; TIO2; C-5-C-7; BETA; SELECTIVITY; ADSORPTION;

D O I：

10.1016/j.ijhydene.2023.03.321

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Platinum (Pt) inclusion on fibrous silica molybdenum (FSMO) and MoO3/KCC-1 catalysts has been prepared and utilized for the lower temperature (200-350 degrees C) catalytic isomerization of n-heptane. The impact of Pt inclusion towards the structure, morphology, and acid distribution of catalysts was characterized by XRD, FTIR, N-2-physisorption, Py-IR, and H-2-IR. Compared with MoO3/KCC-1, FSMO demonstrated superior MoO3 dispersion and amount of Lewis acid site associated with the in-situ synthesis technique. Although Pt inclusion slightly lessened acid sites due to inevitable partial coverage by the Pt cluster, the considerably higher amount of Lewis acid sites compared to Bronsted and conjugated sufficiently for generating protonic acid sites for enriching the isomerization activity. In contrast to Pt/MoO3/KCC-1 and undoped catalysts, Pt/FSMO achieved a superior conversion of 70.9% with 63.6% isomer yield at a low temperature of 250 degrees C. The 28-h stability tests demonstrated that Pt/FSMO recorded stable isomerization activity, with a superior isomer yield (similar to 48-52%) and inferior cracking yield (<3.0%) than Pt/MoO3/KCC-1. (c) 2023 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：375 / 386

页数：12

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