Techno-Economic Analysis of Coal-Based Hydrogen and Electricity Cogeneration Processes with CO₂ Capture

Abstract

The techno-economic performances of various coal-based hydrogen and electricity cogeneration processes are examined under a carbon-constrained scenario. The baseline coal gasification process and the novel membrane and syngas chemical-looping processes are evaluated. Aspen Plus simulation is first performed to analyze the process efficiencies on the basis of a common set of assumptions. This is followed by economic analysis using the cost analysis principles suggested by the U.S. Department of Energy [Cost and Performance Baseline for Fossil Energy Plants, 2007]. The results indicate that the novel membrane and syngas chemical-looping strategies have the potential to notably reduce the energy and cost penalties for CO2 capture in coal conversion processes.

Chemical‐looping technology platform

“…It shows steady, continuous, high‐purity CO 2 and H 2 generation from the reducer and oxidizer gas outlets, respectively. Analysis of the OSU SCL process has shown that it can reduce the cost of electricity production with CO 2 capture by 11% and the cost of H 2 production by 7–9% over the corresponding baseline cases …”

Chemical looping processes for CO2 capture and carbonaceous fuel conversion – prospect and opportunity

“…The following section analyzes the performance of the iron based syngas chemical looping process. 109 Several other potential Type I looping process configurations for hydrogen production are also discussed.…”

Process analysis of a two‐stage fluidized bed gasification system with and without pre‐drying of high‐water content coal

“…As the most abundantly reserved fossil fuel, coal remains an important energy and carbonaceous material source today and will be for the foreseeable future. Compared to other fossil fuels such as crude oil and natural gas, coal is more carbon intensive, [ 1 ] and therefore determining how to utilize the vast reserves more efficiently and less carbon emission has been a challenge. Gasification technology has been developed worldwide for more efficient and clean use of coal as a feedstock and energy resource.…”