期刊
JACS AU
卷 1, 期 6, 页码 795-806出版社
AMER CHEMICAL SOC
DOI: 10.1021/jacsau.0c00127
关键词
BECCS; Adsorption; CO2 Capture; Technoeconotnic Analysis; Degradation
资金
- Center for Understanding and Control of Acid Gas-Induced Evolution of Materials for Energy, an Energy Frontier Research Center - United States Department of Energy (U.S. DOE), Office of Science, Basic Energy Sciences (BES), at the Georgia Institute of Tech [DESC0012577]
This study defines the target properties of CO2 capture adsorbents that would ensure economic viability of bioenergy with carbon capture and storage (BECCS), emphasizing working capacity, lifetime, heat of adsorption, and exponential degradation decay constants. The research predicts that a BECCS process cost of $65/t-CO2 can be achieved with specific adsorbent properties, including cost, working capacity, heat of adsorption, and minimum lifetime.
Target properties of CO2 capture adsorbents that would ensure economic viability of bioenergy with carbon capture and storage (BECCS) are defined. The key role of sorbent lifetime in the process cost is demonstrated, and an optimal heat of adsorption for BECCS is postulated through a balance of adsorbent-adsorbate affinity and regeneration energy demand. Using an exponential decay model of sorbent capacity increases the process cost and results in an optimum sorbent lifetime. To ensure a levelized cost of carbon below $100/tonne-CO2, adsorbents should be designed to have working capacities above 0.75 mol/kg, lifetimes over 2 years, heats of adsorption of approximately -40 kJ/mol, and exponential degradation decay constants below 5 x 10(-6) cycle(-1) (equivalent to a half-life of 1.3 years). Our model predicts a BECCS process cost of $65/t-CO2 can be achieved with a degradation-resistant adsorbent, $40/kg sorbent cost, 2.0 mol/kg working capacity, -40 kJ/mol heat of adsorption, and at least a 2 year lifetime.
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