Evaluation of oxyfuel technology as CO2 capture option in coal combustion (original) (raw)
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L.M.: Exergetic comparison of different oxyfuel technologies
2011
Carbon Capture and Storage (CCS) systems have relevant energy consumption associated with the CO2 capture process. It causes an energy efficiency reduction that diminishes the economic interests and increases the technical uncertainty of these systems. With the objective of improving the system perform-ance and reducing thermodynamic inefficiencies, the exergy analysis has been traditionally applied as a guide for design process. This work presents and compares energy and exergy analysis of two CCS sys-tems based on pressurized oxyfuel combustion, a pressurized fluidized bed combustion working under oxyfiring conditions and a chemical looping combustion using coal as fuel. The aim is to calculate CCS energy and exergy penalties, detecting irreversibilities and proposing items for optimization. It is demon-strated that opposed to energy penalty, the exergy losses do extend neither in the same quantity nor in the same equipment, leading to outstanding conclusions for system improvemen...
2016
This paper describes the techno-economic performance of state of the art (2015) oxyfuel technology for an advanced super critical coal power plant and compares the results to postcombustion capture with standard MEA technology. The purpose of this work is to create a 2015 timestamp for coal oxy-combustion, using the most advanced technology that could be purchased today, thereby adding to the existing body of studies that typically use less sophisticated process configurations (e.g. Ciferno et al. 2008; IEAGHG 2010; Mancuso and Ferrari 2014), but without speculating on further technology development in the coming decades (e.g. Santos 2014). The coal power plant in this study is based on the design suggested by the European Benchmarking Task Force (Cesar 2011). It contains an advanced supercritical steam cycle, and the environmental controls to operate under European emission regulations (Figure 1). The design of the flue gas cleaning and recycle section includes a hot ESP for partic...