Revealing the role of CuMgAlOx catalyst components in cellulose depolymerization and alcohol formation

IF 6.7 1区工程技术 Q2 ENERGY & FUELS

Fuel Pub Date : 2025-03-10 DOI:10.1016/j.fuel.2025.134999

Jian Li , Heping Yang , Mengfei Wang , Xiaowei Bai , Zhenghua Dai , Yunpeng Zhao , Jianzhong Yin

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Abstract

Low-carbon alcohols are clean and renewable energy sources with applications in fuel and chemical industries. This study investigates CuMgAlOx catalysts for cellulose methanolysis under hydrogen-free conditions, focusing on their catalytic mechanisms and kinetic behavior. Catalyst characterization revealed synergistic roles of Cu, Mg, and Al in enhancing acidity, surface area, and dispersion. Cu is essential for methanol reforming and hydrogenolysis, while Mg optimizes the nanostructure by reducing Cu crystallite size from 10.1 nm (CuO) to 8.0 nm and increasing medium-strength acidity (314.9 μmol/g). Al uniquely facilitates acid-base duality, significantly enhancing methoxy ether alcohol (MOA) selectivity to 31.1 % through etherification (k₉ = 6.0 h⁻¹). The Structure-Oriented Lumping (SOL) kinetic model, with strong predictive accuracy (R² > 0.996), illustrates that CuMgAlOx accelerates cellulose depolymerization and hydrodeoxygenation, yielding unprecedented alcohol selectivity (94.3 %) and yield (58.0C%) under hydrogen-free conditions. The study establishes a comprehensive framework for the design of multi-metal catalysts in biomass valorization and advances sustainable alcohol production technologies.

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来源期刊

Fuel 工程技术-工程：化工

CiteScore

12.80

自引率

20.30%

发文量

3506

审稿时长

64 days

期刊介绍： The exploration of energy sources remains a critical matter of study. For the past nine decades, fuel has consistently held the forefront in primary research efforts within the field of energy science. This area of investigation encompasses a wide range of subjects, with a particular emphasis on emerging concerns like environmental factors and pollution.