Catalyst structure-based hydroxymethylfurfural (HMF) hydrogenation mechanisms, activity and selectivity over Ni
نویسندگان
چکیده
• Experimental and in-silico study on HDO of biobased 5-hydroxymethylfurfural. Deoxygenation at higher temperatures relative to reduction the aldehyde. Despite reducibility improvements, La promotion slowed reaction rates activity. Nb facilitated deoxygenation humin formation. Directly comparable kinetic parameters TOF for carbon-supported Ni catalysts. Catalytic hydrodeoxygenation hydroxymethylfurfural was investigated in a three-phase batch reactor over range (170–230 °C), under 5 MPa hydrogen, tetrahydrofuran solvent. Nickel-based catalysts were also promoted by lanthanum niobium, despite promoters alone demonstrated no Based experimentally-obtained liquid products, pathway proposed microkinetic model established, considering adsorption, desorption surface kinetics, mass transfer thermodynamics. An unpromoted Ni/C resulted primarily unsaturated furan diol, highly desirable intermediate polymer industry. As increased > 200 °C, dehydration yielded deoxygenated products suitable solvents biofuel. In spite enhancements reducibility, La-promotion significantly decreased both hydrogenation (8-times) (25-times) rate constants. Alternatively, Nb-incorporation offered additional acidity, while lower activation energies 200% via reactions formation temperatures. It exhibited highest
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ژورنال
عنوان ژورنال: Chemical Engineering Journal
سال: 2021
ISSN: ['1873-3212', '1385-8947']
DOI: https://doi.org/10.1016/j.cej.2020.127553