Dataset on the catalytic performance of SSZ-24 supported Ru catalyst for selective hydrogenation of benzene to cyclohexane

The development of highly selective catalysts is central to the process of selective hydrogenation of benzene to cyclohexene. In this work, an all‑silica SSZ‑24 zeolite was employed for the first time as a support, and an appropriate amount of potassium ions (K+) was introduced during synthesis to modulate the defect structure of the carrier, thereby fabricating a highly dispersed Ru‑based catalyst. The structure, composition, and distribution of Ru species in the Ru/SSZ‑24 catalyst were systematically investigated using a combination of techniques including X‑ray diffraction,In-situ transmission Fourier transform infrared spectroscopy , in‑situ CO‑adsorption infrared spectroscopy, H2 temperature‑programmed reduction, scanning electron microscopy, transmission electron microscopy, X‑ray photoelectron spectroscopy, and N2 physisorption. The catalytic performance for selective hydrogenation of benzene to cyclohexene was evaluated. The results demonstrate that K+ not only regulate the size, dispersion, and distribution of Ru nanoparticles between the bulk and external surface of the zeolite, but also modify the defect sites of the zeolite to anchor Ru active species, generating electron‑deficient Ruδ+ species. This effectively suppresses the further hydrogenation of cyclohexene to cyclohexane, leading to a cyclohexene selectivity of 81.3%.This study systematically analyzed the structure, texture, morphology, and surface chemical properties of the prepared catalyst samples using various complementary characterization techniques. All solid samples undergo reduction treatment before characterization. The specific methods are described in the related papers

高选择性催化剂的开发是苯选择性加氢制备环己烯工艺的核心环节。本研究首次以全硅SSZ-24沸石（all-silica SSZ-24 zeolite）作为载体，在合成过程中引入适量钾离子（K+）调控载体的缺陷结构，由此制备出高分散钌基催化剂（Ru-based catalyst）。本研究通过X射线衍射（X-ray diffraction）、原位透射傅里叶变换红外光谱（in-situ transmission Fourier transform infrared spectroscopy）、原位CO吸附红外光谱（in-situ CO-adsorption infrared spectroscopy）、氢气程序升温还原（H2 temperature-programmed reduction）、扫描电子显微镜（scanning electron microscopy）、透射电子显微镜（transmission electron microscopy）、X射线光电子能谱（X-ray photoelectron spectroscopy）及氮气物理吸附（N2 physisorption）等多种表征手段，系统探究了Ru/SSZ-24催化剂中钌物种的结构、组成与分布情况。同时评价了该催化剂在苯选择性加氢制备环己烯反应中的催化性能。研究结果表明，钾离子不仅能够调控钌纳米颗粒的尺寸、分散性及其在沸石体相与外表面之间的分布，还可修饰沸石的缺陷位点以锚定钌活性物种，生成缺电子的Ruδ+物种。这可有效抑制环己烯进一步加氢生成环己烷的副反应，最终使环己烯选择性达到81.3%。本研究还通过多种互补表征手段，系统分析了所制备催化剂样品的结构、织构、形貌及表面化学性质。所有固体样品在表征前均经过还原处理，具体实验方法详见相关研究论文。