Acidity and Isomerization Activity of SAPO-11 Synthesized by an Improved Hydrothermal Method

Abstract

Abstract: Medium-pore molecular sieve SAPO-11 was synthesized using an improved hydrothermal method, which involves programmed heating of the synthesis gel in the presence of isopropanol. Products were characterized usingX-raydiffraction, scanning electron microscopy, N2 adsorption, ammonia temperature-programmed desorption, infrared spectroscopy of adsorbed pyridine, and29Sisolid-state MAS NMR. The results indicated that the SAPO-11 sample synthesized by this method showed higher crystallinity, smaller particle size, and larger micropore volume than that prepared by the conventional hydrothermal method. Furthermore, the numbers of total acid sites and medium strength acid sites were also enhanced. In the hydroisomerization of n-tetradecane, the Pt/SAPO-11 catalyst thus exhibited high activity and selectivity for isomers.

Key words: SAPO-11, hydrothermal synthesis, isopropanol, programmed temperature, n-tetradecane, hydroisomerization

LIU Ping;REN Jie;SUN Yuhan*. Acidity and Isomerization Activity of SAPO-11 Synthesized by an Improved Hydrothermal Method[J]. Chinese Journal of Catalysis, 2008, 29(4): 379-384.

×
share this article

Add to citation manager EndNote|Ris|BibTeX

URL: https://www.cjcatal.com/EN/

https://www.cjcatal.com/EN/Y2008/V29/I4/379

[1]	Xiaoling Liu, Lei Chen, Hongzhong Xu, Shi Jiang, Yu Zhou, Jun Wang. Straightforward synthesis of beta zeolite encapsulated Pt nanoparticles for the transformation of 5-hydroxymethyl furfural into 2,5-furandicarboxylic acid [J]. Chinese Journal of Catalysis, 2021, 42(6): 994-1003.
[2]	Lijing Sun, Miao Yang, Yi Cao, Peng Tian, Pengfei Wu, Lei Cao, Shutao Xu, Shu Zeng, Zhongmin Liu. A reconstruction strategy for the synthesis of Cu-SAPO-34 with excellent NH₃-SCR catalytic performance and hydrothermal stability [J]. Chinese Journal of Catalysis, 2020, 41(9): 1410-1420.
[3]	Gan Yu, Xinqing Chen, Wenjie Xue, Lixia Ge, Ting Wang, Minghuang Qiu, Wei Wei, Peng Gao, Yuhan Sun. Melting-assisted solvent-free synthesis of SAPO-11 for improving the hydroisomerization performance of n-dodecane [J]. Chinese Journal of Catalysis, 2020, 41(4): 622-630.
[4]	Fen Zhang, Ling Zhang, Zhichao Yang, Shichao Han, Qiuyan Zhu, Liang Wang, Chenguang Liu, Xiangju Meng, Feng-Shou Xiao. Design of fast crystallization of nanosized zeolite omega crystals at higher temperatures [J]. Chinese Journal of Catalysis, 2019, 40(7): 1093-1099.
[5]	Huiyan Pan, Xiaowei Chen, Oihane Sanz, Miguel A. Cauqui, Jose M. Rodríguez-Izquierdo, Juan J. Delgado. A facile one-pot hydrothermal synthesis as an efficient method to modulate the potassium content of cryptomelane and its effects on the redox and catalytic properties [J]. Chinese Journal of Catalysis, 2019, 40(6): 940-952.
[6]	Mengli Zhao, Wanni Wang, Chenxi Huang, Wang Dong, Yang Wang, Sheng Cheng, Huiqing Wang, Haisheng Qian. Facile synthesis of UCNPs/Zn_xCd_1-xS nanocomposites excited by near-infrared light for photochemical reduction and removal of Cr(VI) [J]. Chinese Journal of Catalysis, 2018, 39(7): 1240-1248.
[7]	Chao Zhou, Run Shi, Lu Shang, Li-Zhu Wu, Chen-Ho Tung, Tierui Zhang. Two-step hydrothermal synthesis of Sn₂Nb₂O₇ nanocrystals with enhanced visible-light-driven H₂ evolution activity [J]. Chinese Journal of Catalysis, 2018, 39(3): 395-400.
[8]	Bing Li, Zhenxin Xu, Wei Chu, Shizhong Luo, Fangli Jing. Ordered mesoporous Sn-SBA-15 as support for Pt catalyst with enhanced performance in propane dehydrogenation [J]. Chinese Journal of Catalysis, 2017, 38(4): 726-735.
[9]	Zhichao Yang, Yunqi Liu, Jinchong Zhao, Jianxia Gou, Kaian Sun, Chenguang Liu. Zinc-modified Pt/SAPO-11 for improving the isomerization selectivity to dibranched alkanes [J]. Chinese Journal of Catalysis, 2017, 38(3): 509-517.
[10]	Meixia Wang, Shouying Huang, Jing Lü, Zaizhe Cheng, Ying Li, Shengping Wang, Xinbin Ma. Modifying the acidity of H-MOR and its catalytic carbonylation of dimethyl ether [J]. Chinese Journal of Catalysis, 2016, 37(9): 1530-1538.
[11]	Lei Chen, Peng Lu, Yangyang Yuan, Li Xu, Xiaomin Zhang, Lei Xu. Hydrothermal synthesis of nanosized ZSM-22 and their use in the catalytic conversion of methanol [J]. Chinese Journal of Catalysis, 2016, 37(8): 1381-1388.
[12]	Dhanapalan Karthikeyan, Raji Atchudan, Raji Sivakumar. Effect of metal content on the activity and product selectivity of n-decane hydroisomerization over Ni-Pd/HY zeolite [J]. Chinese Journal of Catalysis, 2016, 37(11): 1907-1917.
[13]	Jinbang Wang, Jinzhe Li, Shutao Xu, Yuchun Zhi, Yingxu Wei, Yanli He, Jingrun Chen, Mozhi Zhang, Quanyi Wang, Wenna Zhang, Xinqiang Wu, Xinwen Guo, Zhongmin Liu. Methanol to hydrocarbons reaction over HZSM-22 and SAPO-11: Effect of catalyst acid strength on reaction and deactivation mechanism [J]. Chinese Journal of Catalysis, 2015, 36(8): 1392-1402.
[14]	Ming Zhou, Hua Yang, Tao Xian, Yang Yang, Yunchuan Zhang. Sonocatalytic activity of LuFeO₃ crystallites synthesized via a hydrothermal route [J]. Chinese Journal of Catalysis, 2015, 36(11): 1987-1994.
[15]	Fang Wang, Hongxing Dai, Jiguang Deng, Shaohua Xie, Huanggen Yang, Wen Han. Nanoplate-aggregate Co₃O₄ microspheres for toluene combustion [J]. Chinese Journal of Catalysis, 2014, 35(9): 1475-1481.

Acidity and Isomerization Activity of SAPO-11 Synthesized by an Improved Hydrothermal Method

PDF (PC)

Knowledge

Cited

Abstract

Cite this article

share this article

share this article

References

Related Articles 15

Recommended Articles

Metrics