Synthesis of Nickel In Situ Modified SAPO-11 Molecular Sieves and Hydroisomerization Performance of Their NiWS Supported Catalysts

SAPO-11 molecular sieves were modified with different Ni contents by the in situ modification method. The Ni-modified SAPO-11 molecular sieves were used as the supports to prepare the corresponding NiW-supported catalysts for the hydroisomerization of n-hexadecane. The Ni-modified SAPO-11 and the co...

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Autores principales:	Xiaojun Dai, Yan Cheng, Meng Si, Qiang Wei, Luyuan Zhao, Xiaohan Wang, Wenbin Huang, Haoran Liu, Yasong Zhou
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	in situ modification SAPO-11 active phase catalyst hydroisomerization Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/b9724057a2bb434cb3728e2bfae43455
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spelling	oai:doaj.org-article:b9724057a2bb434cb3728e2bfae434552021-11-22T06:45:10ZSynthesis of Nickel In Situ Modified SAPO-11 Molecular Sieves and Hydroisomerization Performance of Their NiWS Supported Catalysts2296-264610.3389/fchem.2021.765573https://doaj.org/article/b9724057a2bb434cb3728e2bfae434552021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fchem.2021.765573/fullhttps://doaj.org/toc/2296-2646SAPO-11 molecular sieves were modified with different Ni contents by the in situ modification method. The Ni-modified SAPO-11 molecular sieves were used as the supports to prepare the corresponding NiW-supported catalysts for the hydroisomerization of n-hexadecane. The Ni-modified SAPO-11 and the corresponding NiW-supported catalysts were characterized by X-ray diffraction, scanning electron microscopy, N2 adsorption–desorption, NH3-temperature-programmed desorption, pyridine adsorbed infrared, high-resolution transmission electron microscopy, and X-ray photoelectron spectroscopy. The results showed that Ni in situ modification preserved the crystal structure of SAPO-11; increased the BET specific surface area, mesopore volume, and medium and strong Brønsted acid amount of SAPO-11; and increased the stacking number of the active phase of the catalysts. 3Ni-SAPO-11 possessed the largest BET specific surface area, mesopore volume, and medium and strong Brønsted acid amount. NiW/3Ni-SAPO-11 possessed the highest dispersion of the active phase and the highest sulfidation degree of the active metals. The results of the hydroisomerization of n-hexadecane showed that Ni in situ modification improved the catalytic activity and selectivity of the catalysts for the hydroisomerization of n-hexadecane to varying degrees. Especially, NiW/3Ni-SAPO-11 had the highest catalytic activity and isomer selectivity, and the maximum yield of isomeric hexadecane could reach 71.18%.Xiaojun DaiYan ChengMeng SiQiang WeiLuyuan ZhaoXiaohan WangWenbin HuangHaoran LiuYasong ZhouFrontiers Media S.A.articlein situ modificationSAPO-11active phasecatalysthydroisomerizationChemistryQD1-999ENFrontiers in Chemistry, Vol 9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	in situ modification SAPO-11 active phase catalyst hydroisomerization Chemistry QD1-999
spellingShingle	in situ modification SAPO-11 active phase catalyst hydroisomerization Chemistry QD1-999 Xiaojun Dai Yan Cheng Meng Si Qiang Wei Luyuan Zhao Xiaohan Wang Wenbin Huang Haoran Liu Yasong Zhou Synthesis of Nickel In Situ Modified SAPO-11 Molecular Sieves and Hydroisomerization Performance of Their NiWS Supported Catalysts
description	SAPO-11 molecular sieves were modified with different Ni contents by the in situ modification method. The Ni-modified SAPO-11 molecular sieves were used as the supports to prepare the corresponding NiW-supported catalysts for the hydroisomerization of n-hexadecane. The Ni-modified SAPO-11 and the corresponding NiW-supported catalysts were characterized by X-ray diffraction, scanning electron microscopy, N2 adsorption–desorption, NH3-temperature-programmed desorption, pyridine adsorbed infrared, high-resolution transmission electron microscopy, and X-ray photoelectron spectroscopy. The results showed that Ni in situ modification preserved the crystal structure of SAPO-11; increased the BET specific surface area, mesopore volume, and medium and strong Brønsted acid amount of SAPO-11; and increased the stacking number of the active phase of the catalysts. 3Ni-SAPO-11 possessed the largest BET specific surface area, mesopore volume, and medium and strong Brønsted acid amount. NiW/3Ni-SAPO-11 possessed the highest dispersion of the active phase and the highest sulfidation degree of the active metals. The results of the hydroisomerization of n-hexadecane showed that Ni in situ modification improved the catalytic activity and selectivity of the catalysts for the hydroisomerization of n-hexadecane to varying degrees. Especially, NiW/3Ni-SAPO-11 had the highest catalytic activity and isomer selectivity, and the maximum yield of isomeric hexadecane could reach 71.18%.
format	article
author	Xiaojun Dai Yan Cheng Meng Si Qiang Wei Luyuan Zhao Xiaohan Wang Wenbin Huang Haoran Liu Yasong Zhou
author_facet	Xiaojun Dai Yan Cheng Meng Si Qiang Wei Luyuan Zhao Xiaohan Wang Wenbin Huang Haoran Liu Yasong Zhou
author_sort	Xiaojun Dai
title	Synthesis of Nickel In Situ Modified SAPO-11 Molecular Sieves and Hydroisomerization Performance of Their NiWS Supported Catalysts
title_short	Synthesis of Nickel In Situ Modified SAPO-11 Molecular Sieves and Hydroisomerization Performance of Their NiWS Supported Catalysts
title_full	Synthesis of Nickel In Situ Modified SAPO-11 Molecular Sieves and Hydroisomerization Performance of Their NiWS Supported Catalysts
title_fullStr	Synthesis of Nickel In Situ Modified SAPO-11 Molecular Sieves and Hydroisomerization Performance of Their NiWS Supported Catalysts
title_full_unstemmed	Synthesis of Nickel In Situ Modified SAPO-11 Molecular Sieves and Hydroisomerization Performance of Their NiWS Supported Catalysts
title_sort	synthesis of nickel in situ modified sapo-11 molecular sieves and hydroisomerization performance of their niws supported catalysts
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/b9724057a2bb434cb3728e2bfae43455
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Synthesis of Nickel In Situ Modified SAPO-11 Molecular Sieves and Hydroisomerization Performance of Their NiWS Supported Catalysts

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