Key CO2 capture technology of pure oxygen exhaust gas combustion for syngas-fueled high-temperature fuel cells

Abstract

Integrated gasification fuel cells (IGFCs) integrating high-temperature solid oxide fuel cell technology with CO2 capture processes represents highly-efficient power systems with negligible CO2 emissions. Flame burning with pure oxygen is an ideal method for fuel cell exhaust gas treatment, and this report describes experimental and numerical studies regarding an oxy-combustor for treating the exhaust gas of a 10 kW IGFC system anode. The applied simulation method was verified based on experiments, and the key performance indices of the combustor were studied under various conditions. It was determined that 315 K was the ideal condensation temperature to obtain flame stability. Under these pure oxygen flame burning conditions, CO was almost completely converted, and the dry mole fraction of CO2 after burning was ≥ 0.958 when there was up to 5% excess O2. Overall, 5% excess O2 was recommended to maximize CO2 capture and promote other environmental considerations. Additionally, the optimal tangential fuel jet angle to control the liner temperature was approximately 25°. The total fuel utilization had to be high enough to maintain the oxygen flame temperature of the anode exhaust gas below 1800 K to ensure that the system was environmentally friendly. The results presented herein have great value for designing IGFCs coupled with CO2 capture systems.

High-yield production of liquid fuels in CO2 hydrogenation on a zeolite-free Fe-based catalyst

“…[1][2] Carbon capture, utilization and storage (CCUS) are regarded as a powerful strategy for reducing CO 2 concentration. [2][3][4][5] Chemical valorization of CO 2 into valuable chemicals or fuels is a promising route to turn waste into treasure and reduce the detriment of greenhouse gas. Long-chain hydrocarbons, as carbon-neutral fuels, has high energy density and facile mobile storage capacity, attracting wide attention.…”

Monometallic and Bimetallic Catalysts Supported on Praseodymium-Doped Ceria for the Water–Gas Shift Reaction

“…Hydrocarbon reforming can produce syngas that consists of CO, H 2 , H 2 O, and CO 2 . However, a trace concentration of CO poisons the catalysts utilized in fuel cells [1]. Precious metalbased proton exchange membrane fuel cell anodes require a carbon monoxide amount in the inlet gas below 10-20 ppm; otherwise, the anode is poisoned [2].…”

Effect of CO2 dilution on laminar burning velocities, combustion characteristics and NOx emissions of CH4/air mixtures

“…Carbon dioxide (CO 2 ) and methane are responsible for global warming and climate change. Human beings must solve a series of problems related to global warming, and greenhouse gas emissions is the main factor leading to this problem (Wang et al 2021;Li and Fang 2014). In order to cope with the high CO 2 concentration in the atmosphere, it is necessary to reduce carbon emissions through various methods.…”