Coproducing Value-Added Chemicals and Hydrogen with Electrocatalytic Glycerol Oxidation Technology: Experimental and Techno-Economic Investigations

化学 氧合物 电催化剂 甘油 甘油酸 催化作用 电化学 无机化学 化学工程 有机化学 电极 工程类 物理化学
作者
Hyung Ju Kim,Youngmin Kim,Daewon Lee,Jeong‐Rang Kim,Ho‐Jeong Chae,Soon‐Yong Jeong,Beom‐Sik Kim,Jechan Lee,George W. Huber,Jaewon Byun,Sung‐Hoon Kim,Jeehoon Han
出处
期刊:ACS Sustainable Chemistry & Engineering [American Chemical Society]
卷期号:5 (8): 6626-6634 被引量:97
标识
DOI:10.1021/acssuschemeng.7b00868
摘要

The electrocatalytic oxidation technology of biomass-derived oxygenates such as glycerol presents a promising method of coproducing renewable chemicals and hydrogen in an electrochemical reactor system that uses oxidation chemistry and existing proton exchange membrane technology to electrocatalytically convert oxygenates into value-added chemicals and hydrogen. In this paper, we first demonstrate the techno-economic feasibility of the electrocatalytic glycerol oxidation technology with our experimental investigations. Simple and direct conversion of glycerol into glyceraldehyde (GAD), glyceric acid (GLA), and hydroxypyruvic acid (HPA) by anodic oxidation in an electrocatalytic batch reactor over Pt/C catalysts was performed with only water as a stoichiometric chemical oxidant. We also conducted conventional catalytic (non-electrocatalytic) glycerol oxidation using a catalytic batch reactor with pressurized oxygen as the oxidant to compare conventional catalytic performances to that of the electrocatalytic reactor. The electrocatalytic glycerol oxidation process had a yield for GAD, GLA, and HPA production that was ∼1.7 times higher than that of the non-electrocatalytic process. The turnover frequency of the electrocatalytic process is comparable to and even higher than that of a non-electrocatalytic system. On the basis of the experimental results, we develop process simulation models for both the electrocatalytic and non-electrocatalytic processes and then analyze the energy efficiency and economics of the process models. The minimum selling price (MSP) of GLA for the electrocatalytic process was $2.30/kg of GLA compared to $4.91/kg of GLA for the non-electrocatalytic process.
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