(439f) Insights into the Reaction Schemes of Furfural and 5-Hydroxymethylfurfural Reductions in Acidic Media over Copper
- Conference: AIChE Annual Meeting
- Year: 2022
- Proceeding: 2022 Annual Meeting
- Group: Engineering Sciences and Fundamentals
- Time: Wednesday, November 16, 2022 - 9:30am-9:45am
In this work, the product distributions of FF and HMF were investigated on Cu in acidic media using bulk electrolysis to show the electrochemical pathways that occur in acid. Bulk electrolysis was done using concentrations of the organic substrate between 10 and 120 mM for FF or 50mM for HMF and its derivatives. The electrolyte was acidic with 0.1M or 0.5M H2SO4 to allow production of all species of interest. FF has a simpler reaction network than HMF due to having 2 main products as opposed to 4. We were able to model the FF kinetics through an initial rate study of the electrochemical reactions and determine the most likely mechanism, a non-competitive Langmuir-Hinshelwood mechanism . HMF ECH has a more complex reaction network, however we were able to narrow the network down and determined reactions that will not occur electrochemically under our experimental conditions. Spectroscopy was used to investigate further the surface species during electrochemical reduction.
Homogeneous acidic reactions are well documented for FF [2,3], and we showed in this work that they occur within the HMF system as well. We quantified these homogeneous side reactions using capped vials with no electrochemistry occurring to fully describe the kinetics of the FF and HMF electrochemical systems and quantify which products in the reaction scheme are most susceptible to mass losses from side reactions.
 May, Andrew S., Steven M. Watt, and Elizabeth J. Biddinger. "Kinetics of furfural electrochemical hydrogenation and hydrogenolysis in acidic media on copper." Reaction Chemistry & Engineering 6, no. 11 (2021): 2075-2086
 Jung, Sungyup, and Elizabeth J. Biddinger. "Electrocatalytic hydrogenation and hydrogenolysis of furfural and the impact of homogeneous side reactions of furanic compounds in acidic electrolytes." ACS Sustainable Chemistry & Engineering 4, no. 12 (2016): 6500-6508
 Jung, Sungyup, and Elizabeth J. Biddinger. "Controlling competitive side reactions in the electrochemical upgrading of furfural to biofuel." Energy Technology 6, no. 7 (2018): 1370-1379