Study of metal sequenced spray impregnation method towards Co-Mo/γ-Al2O3 catalytic performance in hydrotreating of used coconut oil to liquid biohydrocarbon

IF 4.8 3区材料科学 Q1 CHEMISTRY, APPLIED

Microporous and Mesoporous Materials Pub Date : 2024-10-12 DOI:10.1016/j.micromeso.2024.113357

Meissha Ayu Ardini , Triyono , Takayoshi Hara , Nobuyuki Ichikuni , Wega Trisunaryanti

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Abstract

A series of bifunctional catalyst CoMo on γ-Al₂O₃ have been successfully prepared using the spray impregnation (dry impregnation), with the variation in the metal sequence (Co-Mo and Mo-Co) and metal impregnation time gap (1-h, 24-h, and simultaneous). XRF indicated that the developed method causes a minimal amount of metal loss during the impregnation process. XRD shows that 24-h treatment reduces crystallinity compared to the 1-h and simultaneous catalysts. Co and Mo existed as CoAl₂O₄, CoO, and MoO₃ as reported by XANES and XPS. The preparation technique signified the catalyst's acidity and surface area. The Co-Mo/γ-Al₂O₃ 24H has a high surface area (118.32 m² g⁻¹), with a pore volume of 0.22 cm³ g⁻¹, and a pore diameter of 7.48 nm. It has a high proportion of weak acid sites (41.32 %) which is crucial to perform HDO reactions. Co-Mo/γ-Al₂O₃ 24H showed high catalytic activity (40.32 wt% liquid product) and selectivity (85.61 % of biogasoline and 9.75 % of diesel fractions) from the hydrotreatment. Kimi@UGM2010.

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将废椰子油加氢处理为液态生物烃的金属序贯喷雾浸渍法对 Co-Mo/γ-Al2O3 催化性能的研究

利用喷雾浸渍法（干法浸渍）成功制备了一系列γ-Al2O3 上的双功能催化剂 CoMo，金属序列（Co-Mo 和 Mo-Co）和金属浸渍时间间隙（1 小时、24 小时和同时）各不相同。XRF 显示，所开发的方法在浸渍过程中造成的金属损失极少。XRD 显示，与 1 小时和同时处理催化剂相比，24 小时处理降低了结晶度。根据 XANES 和 XPS 的报告，钴和钼以 CoAl2O4、CoO 和 MoO3 的形式存在。制备技术决定了催化剂的酸度和表面积。Co-Mo/γ-Al2O3 24H 具有较高的比表面积（118.32 m2 g-1），孔体积为 0.22 cm3 g-1，孔直径为 7.48 nm。它具有较高比例的弱酸位点（41.32 %），这对进行 HDO 反应至关重要。Co-Mo/γ-Al2O3 24H 在加氢处理中表现出很高的催化活性（40.32 wt% 的液体产物）和选择性（85.61 % 的生物汽油和 9.75 % 的柴油馏分）。Kimi@UGM2010。

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来源期刊

Microporous and Mesoporous Materials 化学-材料科学：综合

CiteScore

10.70

自引率

5.80%

发文量

649

审稿时长

26 days

期刊介绍： Microporous and Mesoporous Materials covers novel and significant aspects of porous solids classified as either microporous (pore size up to 2 nm) or mesoporous (pore size 2 to 50 nm). The porosity should have a specific impact on the material properties or application. Typical examples are zeolites and zeolite-like materials, pillared materials, clathrasils and clathrates, carbon molecular sieves, ordered mesoporous materials, organic/inorganic porous hybrid materials, or porous metal oxides. Both natural and synthetic porous materials are within the scope of the journal. Topics which are particularly of interest include: All aspects of natural microporous and mesoporous solids The synthesis of crystalline or amorphous porous materials The physico-chemical characterization of microporous and mesoporous solids, especially spectroscopic and microscopic The modification of microporous and mesoporous solids, for example by ion exchange or solid-state reactions All topics related to diffusion of mobile species in the pores of microporous and mesoporous materials Adsorption (and other separation techniques) using microporous or mesoporous adsorbents Catalysis by microporous and mesoporous materials Host/guest interactions Theoretical chemistry and modelling of host/guest interactions All topics related to the application of microporous and mesoporous materials in industrial catalysis, separation technology, environmental protection, electrochemistry, membranes, sensors, optical devices, etc.