Performance of novel CaO-based sorbents in high temperature CO 2 capture under RF heating

Abstract

ReuseThis article is distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs (CC BY-NC-ND) licence. This licence only allows you to download this work and share it with others as long as you credit the authors, but you can't change the article in any way or use it commercially. More information and the full terms of the licence here: https://creativecommons.org/licenses/ Takedown If you consider content in White Rose Research Online to be in breach of UK law, please notify us by emailing eprints@whiterose.ac.uk including the URL of the record and the reason for the withdrawal request. AbstractThe problem of CO2 mitigation on a small and medium scale can be resolved by developing a combined system of CO2 capture and its consecutive conversion into valuable products. The first stage of CO2 looping, however, should be reliable, effective and easy to control and radiofrequency heating, as a new advanced technology, can be used to improve the process.CO2 absorption and desorption RF units can be installed within power plants and powered during the periods of low energy demand thus stabilizing the electrical grid. In this work, aCaO sorbent produced by template synthesis was studied as a sorbent for a CO2 looping system under RF heating which offers short start-up times, highly controlled operation, high degree of robustness and low price. The sorbent reached its stable CO2 capacity of 15.4 wt.% already after 10 temperature cycles (650/850 o C) under RF heating. Higher CO2 desorption rate and lower degree of the sorbent sintering was observed under RF heating as compared to conventional heating.2

RETRACTED: Transient Operation: A Catalytic Chemoselective Hydrogenation of 2-Methyl-3-Butyn-2-ol via a Cooperative Pd and Radiofrequency Heating Directed Kinetic Resolution

“…A radiofrequency (RF) heated reactor employing a catalyst with magnetic properties has been shown to have the potential for the scaling up of a microreactor while addressing some of the drawbacks associated with the mass-and heat-transfer resistances present in conventional systems [21]. An application exploiting the precise temperature control of RF heating has been shown in adsorption and desorption cycles to enhance safety, even when rapid heating rates are applied allowing clean square wave modulation to be achieved [22,23]. Another usage of the quick heating rate and response time of RF heating is seen when dealing with renewable energy supplies which are prone to fluctuations [24].…”

Electrical Reverse Shift: Sustainable CO2 Valorization for Industrial Scale

“…Integrated ohmic heating provides inherent high heating efficiency with negligible transformation losses compared to other electrically heated technologies, high carbon and hydrogen efficiency, and provides no associated CO 2 emissions when utilizing renewable electricity [14] . Intimate contact between heat source and catalyst provides fast thermal response on par with induction heating, enabling flexible operation and fast start‐up compatible with the intermittent production of renewable energy [15–18] …”

A Carbide Slag-Based, Ca12Al14O33-Stabilized Sorbent Prepared by the Hydrothermal Template Method Enabling Efficient CO2 Capture

“…The main reason is that humans have been using fossil fuels (such as coal, oil, and so on) in large quantities, and the combustion process accompanied by heavy emissions of CO 2 and other greenhouse gases. Calcium looping (CaL) process is one of the feasible large-scale CO 2 capture technologies at present, which is applicable to the process of coal-fired power generation and gasification of coal/biomass for hydrogen production [5][6][7][8][9]. However, one of the problems restricting the development of this technology is the attenuation of CO 2 capture activity of CaO-based sorbents due to high-temperature sintering [10][11][12].…”