Optimized Acidic Sites Distribution for Selective Synthesis of Alkylated Decalins over Acid-Treated Ru/HZSM-5

IF 0.7 4区化学 Q4 CHEMISTRY, PHYSICAL

Russian Journal of Physical Chemistry A Pub Date : 2024-09-11 DOI:10.1134/S003602442470136X

Guiling Wu, Wenli Zhao, Xinyue Yang, Xiaopo Niu, Zhen Guo, Danni Liu, Qingfa Wang

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Abstract

Producing high-density fuel of alkylated decalins from hydrodeoxygenation (HDO) of naphthalene derivatives is an environmentally friendly but still challenging method. Herein, a bifunctional Ru/HZSM-5 catalyst was fabricated by acid treatment (citric acid, oxalic acid, nitric acid) to effectively synthesize the alkylated decalins via HDO of naphthalene derivative. Acid treatment adjusted the acidic site distribution of Ru/HZSM-5. Nitric acid treatment (NA) resulted in more abundance of weak acidic sites which was beneficial for the dehydration process in HDO, and the lowest ratio of BAS/LAS to promote the hydrogenation of alkylated octalins, the rate-determining step of HDO. NA-treated Ru/HZSM-5 showed the highest HDO activity with the highest selectivity of 1,2-dimethyldecalin (74%). Besides, it also presents good HDO activity of naphthalene derivatives to produce high-density hydrocarbons. Therefore, Ru/HZ5-NA is a promising catalyst for the production of alkylated decalins and other high-value biofuels and chemicals.

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优化酸性位点分布，在酸处理过的 Ru/HZSM-5 上选择性合成烷基癸醛

摘要利用萘衍生物的加氢脱氧反应（HDO）生产高密度烷基化癸醛燃料是一种环境友好型方法，但仍具有挑战性。本文通过酸处理（柠檬酸、草酸、硝酸）制备了双功能 Ru/HZSM-5 催化剂，通过萘衍生物的加氢脱氧有效合成了烷基化癸醛。酸处理调整了 Ru/HZSM-5 的酸性位点分布。硝酸处理（NA）使弱酸性位点更加丰富，有利于 HDO 的脱水过程，同时使 BAS/LAS 的比例最低，从而促进了烷基化癸精的氢化，这是 HDO 的决定性步骤。经过 NA 处理的 Ru/HZSM-5 具有最高的 HDO 活性，对 1,2-二甲基萘烷的选择性最高（74%）。此外，它对生产高密度烃的萘衍生物也具有良好的 HDO 活性。因此，Ru/HZ5-NA 是生产烷基化癸醛及其他高价值生物燃料和化学品的一种前景广阔的催化剂。

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来源期刊

Russian Journal of Physical Chemistry A 化学-物理化学

CiteScore

1.20

自引率

14.30%

发文量

376

审稿时长

5.1 months

期刊介绍： Russian Journal of Physical Chemistry A. Focus on Chemistry (Zhurnal Fizicheskoi Khimii), founded in 1930, offers a comprehensive review of theoretical and experimental research from the Russian Academy of Sciences, leading research and academic centers from Russia and from all over the world. Articles are devoted to chemical thermodynamics and thermochemistry, biophysical chemistry, photochemistry and magnetochemistry, materials structure, quantum chemistry, physical chemistry of nanomaterials and solutions, surface phenomena and adsorption, and methods and techniques of physicochemical studies.