摘要：In order to prepare a high-performance SAPO-11 (silicoaluminophosphate-11) based non-noble metal supported catalyst for the hydroisomerization of long-chain n-alkanes, gallium-modified SAPO-11 molecular sieve was successfully synthesized by the in-situ synthesis method, and the NiWS supported catalyst was prepared for the hydroisomerization of n-hexadecane. The effects of Ga-modification on the physicochemical properties of SAPO-11 molecular sieve, the active phase properties, and the catalytic performance of the catalyst were studied. Through a series of physicochemical characterizations, it was found that the introduction of Ga increased the mesoporous volume of SAPO-11 molecular sieve, reduced their acid density and strength, but improved the amount of medium-strong Bronsted acid. The Ga-modification weakened the interaction between the active metals and the support, increased the sulfidation degree of active metals, and increased the stacking number and dispersion of active phase. The results of catalytic performance evaluation showed that the catalytic activity and isomerization selectivity of the Ga-modified SAPO-11 molecular sieve based catalysts were improved, and the yield of i-hexadecane of NiW/2Ga-SAPO-11 was the highest, which was 40.30 % higher than that of NiW/SAPO-11. By analyzing the distribution of isomeric products, it was found that the Ga-modified SAPO-11 molecular sieve was helpful in improving the hydroisomerization depth of n-hexadecane over the catalyst.

关键字：Gallium; Isomerization; Physicochemical properties; SAPO-11; Supported catalysts

ISSN号：1434-1948

卷、期、页：卷26期2

发表日期：2023-01-10

影响因子：2.524000

期刊分区（SCI为中科院分区）：三区

收录情况：SCI（科学引文索引印刷版）,EI（工程索引）,SCIE（科学引文索引网络版）

发表期刊名称：EUROPEAN JOURNAL OF INORGANIC CHEMISTRY

参与作者：Li, Ling,Yu, Wanjin,Liu, Wucan

通讯作者：代校军,成艳,杨晗,司梦

第一作者：魏强,周亚松

论文类型：期刊论文

论文概要：代校军,Li, Ling,成艳,Yu, Wanjin,Liu, Wucan,杨晗,司梦,魏强,周亚松，In-situ Synthesis of Gallium-Containing SAPO-11 Molecular Sieves and Superior Catalytic Performance of Their NiWS Supported Catalysts for Hydroisomerization of n-Hexadecane，EUROPEAN JOURNAL OF INORGANIC CHEMISTRY，2023，卷26期2

论文题目：In-situ Synthesis of Gallium-Containing SAPO-11 Molecular Sieves and Superior Catalytic Performance of Their NiWS Supported Catalysts for Hydroisomerization of n-Hexadecane