红泥负载镍和钴催化剂用于棕榈酸加氢脱氧:对反应途径、产物选择性和催化剂可回收性的见解

IF 5.3 3区 工程技术 Q2 ENERGY & FUELS
Janaki Komandur, Vasu Chaudhary, Ravikrishnan Vinu and Kaustubha Mohanty*, 
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引用次数: 0

摘要

了解线性链脂肪酸的加氢脱氧(HDO)对废油和生物质转化为可持续航空燃料至关重要。本研究利用铝土矿选矿副产物赤泥作为镍、钴金属的载体材料。x射线衍射(XRD)证实了金属的浸渍,x射线光电子能谱(XPS)分析了金属的电子态。采用棕榈酸HDO法评价催化剂性能,研究了催化剂类型、温度、时间和氢气压力对催化剂选择性和转化率的影响。在240℃、5 MPa、4 h条件下,十六醇(10%)和十六烷(87%)的选择性较高,因此在该条件下,催化剂的循环次数可达5次。最佳操作条件将途径从脱羧(DCX)转移到HDO。较低的温度和压力有利于十六烷的形成,而较高的压力则有利于十六烷的形成。傅里叶转移红外光谱(FTIR)、x射线衍射(XRD)、XPS、热重分析(TGA)表明回收后会形成焦炭。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Red Mud-Supported Ni and Co Catalysts for Hydrodeoxygenation of Palmitic Acid: Insights into Reaction Pathway, Product Selectivity, and Catalyst Recyclability

Red Mud-Supported Ni and Co Catalysts for Hydrodeoxygenation of Palmitic Acid: Insights into Reaction Pathway, Product Selectivity, and Catalyst Recyclability

Understanding the hydrodeoxygenation (HDO) of linear chain fatty acids is crucial for the conversion of waste oils and biomass into sustainable aviation fuels. In this study, red mud, a byproduct of bauxite ore processing, was used as a support material for Ni and Co metals. X-ray diffraction (XRD) confirmed the impregnation of metals, and X-ray photoelectron spectroscopy (XPS) analyzed their electronic states. Catalyst performance was evaluated by HDO of palmitic acid, studying the effects of catalyst type, temperature, time, and hydrogen pressure on the selectivity and conversion. At 240 °C, 5 MPa, and 4 h, high selectivity for hexadecanol (10%) and hexadecane (87%) was obtained, and hence, the catalyst recycle at this condition was observed up to 5 cycles. Optimal operating conditions shifted the pathway from decarboxylation (DCX) to HDO. Lower temperatures and pressures favored hexadecanol, while hexadecane formation was favorable at higher pressures. Fourier Transfer Infrared spectroscopy (FTIR), XRD, XPS, thermogravimetric analysis (TGA) indicated coke formation after recycling.

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来源期刊
Energy & Fuels
Energy & Fuels 工程技术-工程:化工
CiteScore
9.20
自引率
13.20%
发文量
1101
审稿时长
2.1 months
期刊介绍: Energy & Fuels publishes reports of research in the technical area defined by the intersection of the disciplines of chemistry and chemical engineering and the application domain of non-nuclear energy and fuels. This includes research directed at the formation of, exploration for, and production of fossil fuels and biomass; the properties and structure or molecular composition of both raw fuels and refined products; the chemistry involved in the processing and utilization of fuels; fuel cells and their applications; and the analytical and instrumental techniques used in investigations of the foregoing areas.
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