Selective Crystallization of Silicoalumophosphate Sapo-11 With A Micromesoporous Structure
DOI:
https://doi.org/10.25271/sjuoz.2021.9.2.827Keywords:
Mesoporous Zeolites, Heterogeneous Catalysis, Zeolites, SAPO-N Silicoaluminophosphates, Hydroisomerization of Higher ParaffinsAbstract
ABSTRACT:
The authors have proposed a method for the selective crystallization of a SAPO-11 silicoaluminophosphate molecular sieve with a micro-mesoporous structure. It has been shown that crystallization of a silicoaluminophosphate gel, in the preparation of which its isopropoxide is used as a source of aluminum, makes it possible to obtain a SAPO-11 molecular sieve with a specific surface area of ~ 207 m2 / g, a volume of micro- and mesopores of ~ 0.08 and 0.09 cm3 / g. , respectively. Using scanning electron microscopy, it was demonstrated that the crystals of the material are pseudospherical particles ~ 8-10 microns in size, consisting of aggregates of nanocrystals ~ 100-200 nm in size.
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[2] Taylor R. J., Petty R. H. Selective hydroisomerization of long chain normal paraffins //Applied Catalysis A: General. – 1994. – Т. 119. – №. 1. – P. 121-138.
[3] Calemma V. et al. Hydrocracking and hydroisomerization of long-chain n-paraffins. Reactivity and reaction pathway for base oil formation //Industrial & engineering chemistry research. – 2004. – Т. 43. – №. 4. – P. 934-940.
[4] Gomes L. C. et al. Hydroisomerization of n-hexadecane using Pt/alumina-Beta zeolite catalysts for producing renewable diesel with low pour point //Fuel. – 2017. – Т. 209. – P. 521-528.
[5] H. Deldari. Suitable catalysts for hydroisomerization of long-chain normal paraffins // Applied Catalysis A: General. 2005. Vol. 293. Pp.1-10.
[6] Schenk M. et al. Shape selectivity in hydrocarbon conversion //Angewandte Chemie International Edition. – 2001. – Т. 40. – №. 4. – P. 736-739.
[7] Yadav R., Sakthivel A. Silicoaluminophosphate molecular sieves as potential catalysts for hydroisomerization of alkanes and alkenes //Applied Catalysis A: General. – 2014. – Т. 481. – P. 143-160.
[8] Vagif M. Akhmedov, Soliman H. Al-Khowaiter. Recent Advances and Future Aspects in the Selective Isomerization of High n-Alkanes // Catalysis Reviews. 2007. Vol. 49. Pp.33-139.
[9] Xiao Cui, Yuxiang Liu, Xinmei Liu. Controlling Acidic Sites to Improve Hydroisomerization Performance of Pt/SAPO-11 Catalysts // Catal Lett. 2015. Vol.145 No. 7. Pp.1464–1473.
[10] Lin Guo, Yu Fan, Xiaojun Bao, Gang Shi, Haiyan Liu. Two-stage surfactant-assisted crystallization for enhancing SAPO-11 acidity to improve n-octane di-branched isomerization // Journal of Catalysis. 2013. Vol. 301. Pp.162–173.
[11] Koohsaryan E., Anbia M. Nanosized and hierarchical zeolites: A short review //Chinese Journal of Catalysis. – 2016. – Т. 37. – №. 4. – P. 447-467.
[12] Feliczak-Guzik A. Hierarchical zeolites: Synthesis and catalytic properties //Microporous and Mesoporous Materials. – 2018. – Т. 259. – P. 33-45.
[13] Oruji S., Khoshbin R., Karimzadeh R. Preparation of hierarchical structure of Y zeolite with ultrasonic-assisted alkaline treatment method used in catalytic cracking of middle distillate cut: The effect of irradiation time //Fuel Processing Technology. – 2018. – Т. 176. – P. 283-295.
[14] Qin Z. et al. Mesoporous Y zeolite with homogeneous aluminum distribution obtained by sequential desilication–dealumination and its performance in the catalytic cracking of cumene and 1, 3, 5-triisopropylbenzene //Journal of Catalysis. – 2011. – Т. 278. – №. 2. – P. 266-275.
[15] Yu Fan, Han Xiao, Gang Shi, Haiyan Liu, Xiaojun Bao. Alkylphosphonic acid- and small amine-templated synthesis of hierarchical silicoaluminophosphate molecular sieves with high isomerization selectivity to di-branched paraffins // Journal of Catalysis. 2012. Vol. 285. Pp.251–259.
[16] Minkee Choi, Rajendra Srivastava, Ryong Ryoo. Organosilane surfactant-directed synthesis of mesoporous aluminophosphates constructed with crystalline microporous frameworks // Chem. Commun. 2006. Pp.4380–4382.
[17] Danny Verboekend, Maria Milina, Javier Pérez-Ramírez. Hierarchical Silicoaluminophosphates by Postsynthetic Modification: Influence of Topology, Composition, and Silicon Distribution // Chem. Mater. 2014. Vol. 26. Pp. 4552−4562.
[18] Lingmei Yang, Shiyou Xing, Hongzhe Sun, Changlin Miao, Ming Li, Pengmei Lv, hongming Wang, Zhenhong Yuan. Citric-acid-induced mesoporous SAPO-11 loaded with highly dispersed nickel for enhanced hydroisomerization of oleic acid to iso-alkanes // Fuel Processing Technology. 2019. Vol. 187. Pp.52-62.
[19] Kanaan R. A., Isomerization of n-hexane in the presence of catalysts based on granular mordenite-type zeolite without binders, Ph.D thesis- USPTU, 2013Pp.1-107.
[20] Pastore H. O., Coluccia S., Marchese L. Porous aluminophosphates: from molecular sieves to designed acid catalysts //Annu. Rev. Mater. Res. 2005. Vol. 35. Pp.351-395.
[21] M. R. Agliullin, Z. R. Khairullina, A. V. Faizullin, B. I. Kutepov. Crystallization of AlPO4-11 Aluminophosphate from Various Aluminum Sources // Petroleum Chemistry. 2019. No. 3. Vol. 59. Pp.349–353.
[22] Cejka J., Corma A., Zones S. Zeolites and catalysis: synthesis, reactions and applications // Wiley-VCH, Weinheim. 2010. 918 p.
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Published
2021-06-30
How to Cite
Khayrullina, Z., Ahmed, K. R., Kambarova, S., & Agliullin, M. (2021). Selective Crystallization of Silicoalumophosphate Sapo-11 With A Micromesoporous Structure. Science Journal of University of Zakho, 9(2), 109–111. https://doi.org/10.25271/sjuoz.2021.9.2.827
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Science Journal of University of Zakho
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