Electrochemical conversion of CO2 to value-added products at copper/graphene composite catalysts

在铜/石墨烯复合催化剂上将CO2电化学转化为增值产品

• 批准号: 518248-2017
• 负责人: GUAY, Daniel
• 金额: $ 1.82万
• 依托单位: Institut national de la recherche scientifique
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=639470
• 关键词: Electrochemical; conversion; CO2; value; added

The present project builds on Sigma Energy Storage's HT-CAES technology to integrate a CO2 processingmodule to provide increased efficacy and environmental benefits. Normally, the HT-CAES system compressesambient air as the energy storage medium, but under Arctic conditions, using diesel exhaust in place of ambientair as the working fluid for compressed air energy storage, leads to the capture and liquefaction up to 58% ofCO2 from diesel exhaust. The liquefied CO2 can then be stored before being injected into an electrolyser,converting it into valuable fuels. The goal of this project is to develop a sustainable electrochemical processthat will convert CO2 into valuable fuels via the CO2 Reduction Reaction (CO2RR), ideally ethanol which canbe reused in the diesel generators to further reduce diesel consumption.To assess the electrocatalytic properties of the SES' copper/graphene nanoparticles towards CO2 conversion,we propose to develop an electrochemical cell, inspired from the Membrane Electrode Assembly (MEA)technology, coupled with analytical methods to detect and quantify the nature of formed products. For thispurpose, an electrochemical cell already used for previous CO2RR studies inside Daniel's Guay Laboratory willbe modified for MEA insertion. Reaction parameters and electrochemical properties will be systematicallyevaluated by probing different catalysts in the MEA configuration. Gaseous products out of the CO2electrolyser will be sampled by GC analyses while aqueous products will be analysed by NMR spectroscopy.Careful attention will be devoted to the MEA design to enhance the number of available electrocatalyticallyactive sites. Finally, the operating conditions will be varied to maximize the formation of desired products(ethanol, as required by SES).The development of the electrochemical CO2 conversion technology has the potential for significant benefitsfor Canada in terms of development of on-site CO2 valorization to value-added products and highly efficientrenewable energy systems to reduce both diesel consumption and CO2 emissions.

目前的项目以 Sigma Energy Storage 的 HT-CAES 技术为基础，集成了二氧化碳处理模块，以提高效率和环境效益。通常，HT-CAES系统压缩环境空气作为储能介质，但在北极条件下，使用柴油机尾气代替环境空气作为压缩空气储能的工作流体，可以捕获并液化柴油机尾气中高达58%的二氧化碳。液化二氧化碳可以被储存，然后注入电解槽，将其转化为有价值的燃料。该项目的目标是开发一种可持续的电化学工艺，通过二氧化碳还原反应 (CO2RR) 将二氧化碳转化为有价值的燃料，最好是乙醇，可以在柴油发电机中重复使用，以进一步减少柴油消耗。为了评估 SES 的铜/石墨烯纳米颗粒对二氧化碳转化的电催化性能，我们建议开发一种电化学电池，其灵感来自于 膜电极组装 (MEA) 技术，结合分析方法来检测和量化成型产品的性质。为此，Daniel 的 Guay 实验室之前已用于 CO2RR 研究的电化学电池将进行修改，以插入 MEA。通过探测 MEA 配置中的不同催化剂，系统地评估反应参数和电化学性能。 CO2 电解槽中的气态产品将通过 GC 分析进行取样，而水性产品将通过 NMR 光谱进行分析。MEA 设计将得到仔细关注，以增加可用的电催化活性位点的数量。最后，操作条件将发生变化，以最大限度地形成所需产品（乙醇，根据 SES 的要求）。电化学 CO2 转化技术的开发有可能为加拿大带来重大利益，包括开发现场 CO2 增值产品和高效可再生能源系统，以减少柴油消耗和 CO2 排放。