Abstract
Non-thermal plasma-induced one-step desorption of splitting of CO2 has been investigated in this research for carbon capture and utilization. An experimental study was conducted in a plasma-sorbent system that consists of a coaxial DBD reactor packed with hydrotalcite pellets. Operation parameters including discharge power and carrier gas flow rate were varied to explore their effect on the desorption of CO2 from the sorbent and conversion to CO. Results showed that the discharge power plays the dominant role in the desorption process. Faster desorption was achieved with increasing power but at a cost of CO2 conversion. Although the carrier gas flow rate does not have a significant effect on the desorption, higher conversion was achieved with a higher flow rate due to the dilution effect. The maximum single pass conversion of CO2 achieved was 67.44%. Based on the feature of this technology, periodic operation of multiple reactors including reactors in parallel and in series are discussed for continuous CO2 capture and its full conversion.
Highlights
The increase of greenhouse gas (GHG) emissions is the main responsible for the observed climate changes and its impact on the ecosystems
An experimental study was conducted in a plasma-sorbent system that consists of a coaxial dielectric barrier discharge reactor (DBD) reactor packed with hydrotalcite pellets
The plasma is generated inside a coaxial dielectric barrier discharge reactor (DBD) which is connected to an AC high voltage power supply (AFS G155-150 K). the main body of this reactor is made of an alumina tube with external and internal diameters of 15 mm and 10 mm respectively
Summary
The increase of greenhouse gas (GHG) emissions is the main responsible for the observed climate changes and its impact on the ecosystems. The atmospheric concen tration of CO2 has been increasing rapidly during the past century and reached a new peak of 408.5 ppm in 2018 [2] To address this issue, various policies and regulations have been made by governments and organizations across the globe to reduce carbon emissions. During the past ten years, the conversion of CO2 into fuels or value-added chemicals has become a hot topic as it respond to the urgent need of climate change and make use of the waste CO2 as a carbon source [3]. It serves as a potential solution for energy storage. This is in line with the concept of “power to gas” which could play a significant role in the future energy system [56]
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