The Effect of Starting Material Ratio, Heating Temperature and Time on the Morphology of Na A zeolite

Authors

  • Mathavee SATHUPUNYA The Petroleum and Petrochemical College, Chulalongkorn University
  • Erdogan GULARI The Department of Chemical Engineering, College of Engineering, University of Michigan
  • Sujitra WONGKASEMJIT The Petroleum and Petrochemical College, Chulalongkorn University

Keywords:

Alumatrane, Silatrane, Microwave technique, Sol-gel process, and Zeolite A

Abstract

1 mm crystal-size Na A zeolite (LTA) is successfully synthesized via the sol-gel process and microwave heating technique using alumatrane and silatrane as precursors. The optimal conditions to obtain LTA were 1:1:3:410 SiO2:Al2O3:Na2O:H2O ratio, microwave heating temperature and a time of 110°C and 160 min, respectively. Under the same conditions, increasing the Na2O concentration exponentially reduces the microwave heating time from 160 min at a Na2O:SiO2 ratio of 3:1 to 5 min at a Na2O:SiO2 ratio of 9:1. Increasing the Na2O concentration strongly affects the particle size and particle size distribution, but does not affect the product composition. Increasing the amount of water increased the average particle size and also the number of irregular cubic shape crystals.  Increasing the aging temperature from 90° to 150°C, everything else being the same (one hour heating time and the
loading ratio of SiO2:Al2O3:5Na2O:410H2O), only amorphous product was produced at 90°C and between 110°-150°C only LTA was produced.

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Published

2022-08-21

How to Cite

[1]
M. SATHUPUNYA, E. GULARI, and S. WONGKASEMJIT, “The Effect of Starting Material Ratio, Heating Temperature and Time on the Morphology of Na A zeolite”, J Met Mater Miner, vol. 12, no. 2, pp. 41–50, Aug. 2022.

Issue

Vol. 12 No. 2 (2003)

Section

Original Research Articles

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