Tartaric Acid Assisted Preparation of Highly Dispersed Ni/SAPO-11 Catalysts for Hydrocarbon Hydroisomerization

IF 2.3 4区化学 Q3 CHEMISTRY, PHYSICAL Catalysis Letters Pub Date : 2025-01-23 DOI:10.1007/s10562-025-04940-x

Chenglong Wen, Kang Liu, Yi Lu, Xintian Wu, Shuning Li, Mohong Lu, Jie Zhu, Mingshi Li, Chunshan Song, Xiaosong Lu

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Abstract

Ni/SAPO-11 catalysts with highly dispersed Ni (TA-Ni/SA-11) were prepared using tartaric acid as a dispersant. The effect of the tartaric acid content on the physiochemical properties of the TA-Ni/SA-11 catalysts and their n-heptane hydroisomerization performance were investigated. TA-Ni/SA-11 exhibits smaller Ni particles and more Ni active sites in comparison to conventional Ni/SAPO-11 prepared via the impregnation method due to the interaction between tartaric acid and Ni²⁺. As the molar ratio of tartaric acid and Ni²⁺ (n_TA/n_Ni) increases, the number of Ni active sites in TA-Ni/SA-11 rises, while the surface area and relative crystallinity decrease because of the dealumination of SAPO-11. When n_TA/n_Ni is 0.75, 0.75TA-Ni/SA-11 presents the highest n-heptane conversion of 82.4% and isomer selectivity of 90.5%, as well as the lowest cracking selectivity of 9.0% at 380 °C, 1.5 MPa, 2 h^− 1, and a volume ratio of H₂ to n-heptane of 400 among these catalysts.

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酒石酸辅助制备高分散Ni/SAPO-11烃类加氢异构化催化剂

以酒石酸为分散剂制备了具有高分散镍的Ni/SAPO-11催化剂（TA-Ni/SA-11）。研究了酒石酸含量对TA-Ni/SA-11催化剂理化性能和正庚烷加氢异构化性能的影响。由于酒石酸与Ni2+的相互作用，TA-Ni/SA-11比浸渍法制备的Ni/SAPO-11具有更小的Ni颗粒和更多的Ni活性位点。随着酒石酸与Ni2+ (nTA/nNi)摩尔比的增加，TA-Ni/SA-11中Ni活性位点的数量增加，而SAPO-11的脱铝作用使TA-Ni/SA-11的表面积和相对结晶度降低。当nTA/nNi为0.75时，在380℃、1.5 MPa、2 h−1条件下，0.75 ta - ni /SA-11的正庚烷转化率最高，为82.4%，异构体选择性为90.5%，裂化选择性最低，为9.0%，H2与正庚烷的体积比为400。图形抽象

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产品信息

阿拉丁

n-Heptane

阿拉丁

Phosphoric acid

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Di-n-propylamine (DPA)

来源期刊

Catalysis Letters 化学-物理化学

CiteScore

5.70

自引率

3.60%

发文量

327

审稿时长

1 months

期刊介绍： Catalysis Letters aim is the rapid publication of outstanding and high-impact original research articles in catalysis. The scope of the journal covers a broad range of topics in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis. The high-quality original research articles published in Catalysis Letters are subject to rigorous peer review. Accepted papers are published online first and subsequently in print issues. All contributions must include a graphical abstract. Manuscripts should be written in English and the responsibility lies with the authors to ensure that they are grammatically and linguistically correct. Authors for whom English is not the working language are encouraged to consider using a professional language-editing service before submitting their manuscripts.