Carbon chain analysis on a coal IGCC — CCS system with flexible multi-products

Abstract

A carbon chain analysis is applied to assess a complex energy conversion system with CO2 Capture and Storage (CCS). A coal integrated gasification combined cycle, with CCS, which co-produces electricity and liquid fuels (IGCC-LF-CCS) is taken as a case study. A process simulation method is used to estimate the technological data, and balance the heat and electricity for the whole system. Carbon and energy flows are calculated to evaluate the mass conversion efficiency and the energy efficiency. The results show that in the case in which one third of the coal is allotted to synthesize liquid fuels, globally 60 % carbon is captured for storage, 19 % carbon is transferred to liquid fuels, 19 % carbon is emitted to the atmosphere as CO2, while the remaining carbon is discharged as solid waste. For the energy flow, 28.1 % of total higher heating value of coal is converted into the liquid fuels. The net electricity efficiency is 20.7 % accounting for the power demands by air separation, CO2 capture and compression. Three scenarios with different ratio of resource to produce electricity and liquid fuels with or without CCS have been studied and compared. This work will provide useful information for the coal resource utilization with CCS in a carbon-constrained world.

Post-combustion carbon capture technologies: Energetic analysis and life cycle assessment

“…The final capture ratio and CO2 purity in each scenario are assigned to be 90% and 95% (mol), respectively. The parameters are mainly from literature, industrial data and engineering heuristics (Anantharaman et al, 2010;Favre, 2011;Husebye et al, 2012;Hussain and Hagg, 2010;Merkel et al, 2010;Stern, 1968;Zhang et al, 2012a), and also based on the sensitivity analysis in this work.…”

A new power, methanol, and DME polygeneration process using integrated chemical looping systems

“…The thermal efficiency of the plant is calculated for each case as [3,47]: g therm ¼ HHV of fuels produced þ power generated HHV of all fossil fuel consumed þ helium stream energy consumed…”

“…Coal is still a relatively inexpensive and reliable resource for most industrialized countries (50% of electricity in the United States comes from coal [1]). Most research in this area focuses on advanced concepts such as: (1) decreasing the carbon capture cost by switching from traditional pulverized coal combustion plants to the integrated gasification combined cycle process (IGCC) as an approach to replace the low-concentration CO 2 absorption processes with more effective techniques [2]; (2) improving the efficiency and flexibility of power plants by using multi-product processes [3]; and (3) integrating existing techniques with alternative energy sources such as natural gas [4][5][6] and biomass [7].…”

Co-Production of Olefins, Fuels, and Electricity from Conventional Pipeline Gas and Shale Gas with Near-Zero CO2 Emissions. Part II: Economic Performance

“…By tightly integrating the different parts of the polygeneration process together, significant profitability and efficiency improvements can result [4][5][6]. Several studies have been performed on the techno-economic analysis of various polygeneration models.…”