Abstract
One of the reasons for the gigantic interest in SAPO-34 by researchers is to commercialize SAPO-34 effectively by considering the economic, energy, and activity aspects as it has found enormous uses in various industrial applications. The present study focuses on the preparation method named the dry gel conversion method for synthesizing SAPO-34. Four different structure-directing agents (SDA’s) (tetraethylammonium hydroxide (TEAOH), triethylamine (TEA), morpholine, diethylamine (DEA)) in different amounts are utilized for the synthesis of SAPO-34 along with alumina, silica, phosphorus precursors. Two sets of a mixed combination of the templates are taken into consideration for SAPO-34, which are TEAOH/TEA/Morpholine/DEA with the molar composition of 0.2/0.4/0.6/0.8 and 0.4/0.2/0.8/0.6, and crystallization time is taken as 3, 5, and 8 h. XRD, FTIR, TPD, nitrogen adsorption, TGA, SEM, EDX, TEM investigated the catalyst’s physicochemical properties. For both gel compositions, the pure phase of SAPO-34 is formed at 5 h, with the variation in the intensity of crystallinity. The micropore surface area and external surface area of the prepared catalysts fall in the range of 79–697 m2/g and 44–175 m2/g, respectively.
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Acknowledgements
The author would like to thank the Ministry of Human Resource Research Development (MHRD), Government of India for financial assistantship. The author would also like to sincerely thank Prof. Shishir Sinha (Department of Chemical Engineering, IIT Roorkee) and Prof. Surendra Kumar (Former Professor, Department of Chemical Engineering, IIT Roorkee) for the prolific discussions.
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Riyar, B.K., Agarwal, V.K. Synthesis of SAPO-34 using the different combinations of four templates by dry gel conversion method. Braz. J. Chem. Eng. 38, 887–900 (2021). https://doi.org/10.1007/s43153-021-00142-1
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DOI: https://doi.org/10.1007/s43153-021-00142-1