Next Article in Journal / Special Issue
Effect of Citric Acid on MoO3/Al2O3 Catalysts for Sulfur-Resistant Methanation
Previous Article in Journal
Factors Controlling the Redox Activity of Oxygen in Perovskites: From Theory to Application for Catalytic Reactions
Previous Article in Special Issue
Hydrothermal Fabrication of High Specific Surface Area Mesoporous MgO with Excellent CO2 Adsorption Potential at Intermediate Temperatures
Article Menu
Issue 5 (May) cover image

Export Article

Open AccessArticle
Catalysts 2017, 7(5), 150; doi:10.3390/catal7050150

Synthesis of SAPO-34 Molecular Sieves via Novel Intermittent Hydrothermal Treatment and Its Effect on the Crystallization and Product Properties

1
Applied Catalysis Department, National Institute of Clean-and-Low-Carbon Energy, Beijing 102209, China
2
State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China
*
Authors to whom correspondence should be addressed.
Academic Editors: Benoît Louis, Qiang Wang and Marcelo Maciel Pereira
Received: 13 March 2017 / Revised: 24 April 2017 / Accepted: 26 April 2017 / Published: 11 May 2017
View Full-Text   |   Download PDF [6604 KB, uploaded 19 May 2017]   |  

Abstract

Intermittent hydrothermal treatment was introduced into the synthesis of SAPO-34 molecular sieves to control the nucleation and the growth in the crystallization. The effect of the crystallization time, the order of long-time and short-time crystallization in two-stage crystallization, and frequency in multi-stage crystallization on synthesis, physicochemical properties and catalytic performance for conversion of methanol to light olefins (MTO) has been studied. The results show that pure SAPO-34 can be obtained with increasing crystallization time. The interruption of the initial crystallization is more beneficial for improving the Si distribution and the MTO catalytic performance of SAPO-34 molecular sieves. The sample obtained by repeatedly alternating heating and cooling during crystallization shows smaller particle size, higher acidity, longer lifetimes and higher yields of ethylene than that obtained by the conventional continuous crystallization at high temperature. View Full-Text
Keywords: intermittent hydrothermal treatment; SAPO-34; synthesis; MTO; catalytic performance intermittent hydrothermal treatment; SAPO-34; synthesis; MTO; catalytic performance
Figures

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Supplementary material

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Guo, Z.; Miao, P.; Zhu, W.; Guo, L.; Li, F.; Xue, Y.; Yin, Q.; Yuan, R.; Xu, L. Synthesis of SAPO-34 Molecular Sieves via Novel Intermittent Hydrothermal Treatment and Its Effect on the Crystallization and Product Properties. Catalysts 2017, 7, 150.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Catalysts EISSN 2073-4344 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top