Aqueous phase hydrogenolysis of glycerol with in-situ hydrogen generation over Ni catalysts supported on activated carbon: Effects of nickel loading and base addition

IF 5.8 2区生物学 Q1 AGRICULTURAL ENGINEERING

Biomass & Bioenergy Pub Date : 2025-02-26 DOI:10.1016/j.biombioe.2025.107744

R. Raso, L. García, J. Ruiz, M. Oliva, J. Arauzo

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Abstract

The present work studied the influences of nickel loading and KOH addition on the aqueous phase hydrogenolysis of glycerol over nickel supported on activated carbon (Ni/AC) catalysts prepared by the incipient wetness impregnation method and without external hydrogen addition in a continuous operation. It has been observed that the calcination stage of the catalytic precursor reduces nickel oxide to dispersed nickel metal crystallites, making catalyst activation with hydrogen unnecessary. This process predominantly yields liquid products, with low gas production under the studied conditions. Among the produced liquids, acetol and 1,2-propanediol are the major components. Furthermore, the addition of a base (KOH) is beneficial both in terms of significantly increasing glycerol conversion and the yield to liquids and also to improve selectivity towards 1,2-propanediol due to the participation of the basic route. The best catalytic activity was achieved using the catalyst with 10 wt% of Ni and added base with the highest glycerol conversion close to 40 % and selectivity to 1,2-propanediol greater than 70 %.

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来源期刊

Biomass & Bioenergy 工程技术-能源与燃料

CiteScore

11.50

自引率

3.30%

发文量

258

审稿时长

60 days

期刊介绍： Biomass & Bioenergy is an international journal publishing original research papers and short communications, review articles and case studies on biological resources, chemical and biological processes, and biomass products for new renewable sources of energy and materials. The scope of the journal extends to the environmental, management and economic aspects of biomass and bioenergy. Key areas covered by the journal: • Biomass: sources, energy crop production processes, genetic improvements, composition. Please note that research on these biomass subjects must be linked directly to bioenergy generation. • Biological Residues: residues/rests from agricultural production, forestry and plantations (palm, sugar etc), processing industries, and municipal sources (MSW). Papers on the use of biomass residues through innovative processes/technological novelty and/or consideration of feedstock/system sustainability (or unsustainability) are welcomed. However waste treatment processes and pollution control or mitigation which are only tangentially related to bioenergy are not in the scope of the journal, as they are more suited to publications in the environmental arena. Papers that describe conventional waste streams (ie well described in existing literature) that do not empirically address ''new'' added value from the process are not suitable for submission to the journal. • Bioenergy Processes: fermentations, thermochemical conversions, liquid and gaseous fuels, and petrochemical substitutes • Bioenergy Utilization: direct combustion, gasification, electricity production, chemical processes, and by-product remediation • Biomass and the Environment: carbon cycle, the net energy efficiency of bioenergy systems, assessment of sustainability, and biodiversity issues.