Conversion of methanol to olefins: Stabilization of nanosized SAPO-34 by hydrothermal treatment

被引：103

作者：

Li, Zhibin ^{[1
]}

Martinez-Triguero, Joaquin ^{[1
]}

Yu, Jihong ^{[2
]}

Corma, Avelino ^{[1
]}

机构：

[1] Univ Politecn Valencia, Inst Tecnol Quim, Consejo Super Invest Cient, Valencia 46022, Spain

[2] Jilin Univ, Coll Chem, State Key Lab Inorgan Synth & Preparat Chem, Changchun 130012, Peoples R China

来源：

JOURNAL OF CATALYSIS | 2015年 / 329卷

关键词：

Methanol conversion; SAPO-34; Deactivation; Hydrothermal stabilization; Nanocrystal; SOLID-STATE NMR; MOLECULAR-SIEVES; SILICOALUMINOPHOSPHATES H-SAPO-34; REACTION-MECHANISMS; THERMAL-STABILITY; MTO REACTION; ACIDITY; NANOCRYSTALS; SELECTIVITY; PHOSPHORUS;

D O I：

10.1016/j.jcat.2015.05.025

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：

Nano-SAPO-34 zeolite catalyst (20 nm crystal size) has been stabilized by hydrothermal treatment. After steamed at high temperatures (T >= 550 degrees C), its textural properties and high lifetime during the reaction of methanol to olefins (MTO) are preserved, despite the decrease in acidity, even after months of contact with moisture. The stabilization effect is attributed to the migration of silicon to larger silicon islands in which the contribution of silicon on the edge is lower after steaming. Stabilization is not successful by a thermal treatment in air in the absence of water. Steaming at temperature >400 degrees C is required for achieving hydrothermal stabilization. A stability test for SAPO-34 in MTO reaction is proposed. (C) 2015 Elsevier Inc. All rights reserved.

引用

页码：379 / 388

页数：10

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