Nature of active tin species and promoting effect of nickle in silica supported tin oxide for dehydrogenation of propane

被引：29

作者：

Wang, Haoren ^{[1
]}

Wang, Hui ^{[1
]}

Li, Xiuyi ^{[1
]}

Li, Chunyi ^{[1
]}

机构：

[1] China Univ Petr, State Key Lab Heavy Oil Proc, Qingdao 266580, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2017年 / 407卷

基金：

中国国家自然科学基金;

关键词：

Propane dehydrogenation; SnO2/SiO2; Active species; Polymeric Si-O-Sn2+; CATALYTIC-PROPERTIES; MESOPOROUS SILICA; METAL-OXIDE; MCM-41; SITES; HYDROGENATION; STABILITY; SN-MCM-41; ZEOLITE; SIO2;

D O I：

10.1016/j.apsusc.2017.02.216

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：

Different with Wang et. al.'s study, we found that polymeric Si-O-Sn2+ rather than Ni-Sn alloy and metallic Sn are active species in silica -supported tin oxide catalysts for dehydrogenation of propane. The results showed that high surface area of mesoporous silica brought about high dispersion of tin oxide species, as a result, catalytic activity and stability were both improved. DRUV-vis, XPS, TPR and XRD studies of fresh and reduced catalysts indicated that the deactivation was related to the reduction of active species rather than the coke formation since active tin species cannot maintain its oxidation state at reaction conditions (high temperature and reducing atmosphere). The formed Ni3Sn2 alloy after reduction just functioned as promoter which accelerated the desorption of H-2 and regeneration of active site. A synergy effect between active tin species and Ni3Sn2 alloy were observed. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：456 / 462

页数：7

共 32 条

[1] Nopol production over Sn-MCM-41 synthesized by different procedures - Solvent effects [J].

Alarcon, Edwin A. ;

Correa, Luis ;

Montes, Consuelo ;

Luz Villa, Aida .

MICROPOROUS AND MESOPOROUS MATERIALS, 2010, 136 (1-3) :59-67

[2] Support effects on de-NOx catalytic properties of supported tin oxides [J].

Auroux, A ;

Sprinceana, D ;

Gervasini, A .

JOURNAL OF CATALYSIS, 2000, 195 (01) :140-150

[3] Framework and Extraframework Tin Sites in Zeolite Beta React Glucose Differently [J].

Bermejo-Deval, Ricardo ;

Gounder, Rajamani ;

Davis, Mark E. .

ACS CATALYSIS, 2012, 2 (12) :2705-2713

[4] Nanoscopic tin-oxygen linings on mesoporous silica as a novel catalyst for organic hydrogen transfer reaction [J].

Burch, R ;

Caps, V ;

Gleeson, D ;

Nishiyama, S ;

Tsang, SC .

APPLIED CATALYSIS A-GENERAL, 2000, 194 :297-307

[5] Synthesis, characterization, and catalytic properties of mesoporous tin-containing analogs of MCM-41 [J].

Chaudhari, K ;

Das, TK ;

Rajmohanan, PR ;

Lazar, K ;

Sivasanker, S ;

Chandwadkar, AJ .

JOURNAL OF CATALYSIS, 1999, 183 (02) :281-291

[6] Nanosized metal oxides in the mesopores of MCM-41 and MCM-48 silicates [J].

Dapurkar, SE ;

Badamali, SK ;

Selvam, P .

CATALYSIS TODAY, 2001, 68 (1-3) :63-68

[7] An Inner-/Outer-Sphere Stabilized Sn Active Site in β-Zeolite: Spectroscopic Evidence and Kinetic Consequences [J].

Dijkmans, Jan ;

Dusselier, Michiel ;

Janssens, Wout ;

Trekels, Maarten ;

Vantomme, Andre ;

Breynaert, Eric ;

Kirschhock, Christine ;

Sels, Bert F. .

ACS CATALYSIS, 2016, 6 (01) :31-46

[8] Optimal synthesis parameters and application of Sn-MCM-41 as an efficient heterogeneous catalyst in solvent-free Mukaiyama-type aldol condensation [J].

Gaydhankar, T. R. ;

Joshi, P. N. ;

Kalita, P. ;

Kumar, R. .

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL, 2007, 265 (1-2) :306-315

[9] Novel pathways for the preparation of mesoporous MCM-41 materials:: control of porosity and morphology [J].

Grün, M ;

Unger, KK ;

Matsumoto, A ;

Tsutsumi, K .

MICROPOROUS AND MESOPOROUS MATERIALS, 1999, 27 (2-3) :207-216

[10] Identification of Active and Spectator Sn Sites in Sn-β Following Solid-State Stannation, and Consequences for Lewis Acid Catalysis [J].

Hammond, Ceri ;

Padovan, Daniele ;

Al-Nayili, Abbas ;

Wells, Peter. P. ;

Gibson, Emma K. ;

Dimitratos, Nikolaos .

CHEMCATCHEM, 2015, 7 (20) :3322-3331

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