Carbon Dioxide Mitigation Using Renewable Power
- Type: Conference Presentation
- Conference Type: AIChE Spring Meeting and Global Congress on Process Safety
- Presentation Date: August 18, 2020
- Duration: 20 minutes
- Skill Level: Intermediate
- PDHs: 0.40
As we tackle the technical, economic, environmental, and resource management issues related to the use of renewable energy for CO2 mitigation, it is important to understand the potential âefficienciesâ for the conversion of renewable energy in the various approaches. We should view renewable energy, in particular renewable power, as a valuable resource, not as a âcheapâ or âfreeâ resource to be used indiscriminately. Both thermodynamic and practical arguments will be made to make realistic estimates of the magnitude of CO2 consumed or displaced from various schemes that utilize renewable power. Renewable power through the grid to a battery electric vehicle is nearly four times as effective at mitigating CO2 emissions as using liquid fuel via electroreduction of CO2. Electrolysis of water with renewable power to produce hydrogen for a fuel cell vehicle is about twice as effective at mitigating CO2 as electroreduction of CO2.
This is not an attempt to cover the complete life cycle analysis and greenhouse gas impacts of each scheme discussed. This is an attempt to provide an approximate ranking of the effectiveness of the various schemes that utilize renewable power to mitigate CO2 emissions. It is believed that inclusion of the thermodynamics for the major energy-consuming steps for each scheme will allow this ranking to be done. It is hoped the perspective this provides will help researchers prioritize their available resources into areas that have the greatest potential impact for CO2 mitigation via renewable power.
X. Lim, "How to Make the Most of Carbon Dioxide," Nature, vol. 526, pp. 628-630, 2015.
S. Stevenson, "Thermodynamic Considerations in CO2 Utilization," AICHE Journal, 2019.
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|AIChE Undergraduate Student Members||Free|