Sensitivity analysis of a Vision 21 coal based zero emission power plant

Design of highly efficient coal-based integrated gasification fuel cell power plants

“…Verma et al [16] later used the "IGFC 'Near Zero Emission' case" described above as a baseline case and conducted sensitivity analyses to investigate the impacts of SOFC pressure, SOFC voltage, SOFC fuel utilization and the gasifier carbon conversion on the overall system performances. Sensitivity analyses revealed that SOFC pressure is the most significant factor, followed by SOFC fuel utilization, gasification conversion and SOFC voltage.…”

“…So far, an IGFC system incorporat-ing the catalytic hydro-gasifier [17] comes closest to realizing DOE's IGFC efficiency goal, but the target of 60% efficiency (HHV basis) with more than 90% CO 2 separated has not been achieved yet. (3) Higher operation pressure for the SOFC is generally beneficial to the IGFC system performance [13,16], but this has always been a challenge for the SOFC designers. (4) The syngas cleaning processes also affect IGFC system efficiency significantly.…”

“…This efficiency goal as set by the DOE is to account for any penalty associated with CO 2 separation but not that due to its compression to the sequestration pressure. Previous conceptual analyses of such IGFC plants have clearly shown the potential for improved efficiency and emissions relative to other system approaches [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17], yet none of the research work published to date have demonstrated this performance goal, mostly due to the fact that even with highly efficient SOFC as the power block, CO 2 separation and the gasification process posed significant efficiency penalties on the system. Besides, integration of an SOFC power block with a gasification system is very different from the integration of gas turbine and steam turbine power blocks that are typical of an integrated gasification combined cycle (IGCC) plant due to the unique operating and control features of SOFC stacks.…”

On the role of fuel cells and hydrogen in a more sustainable and renewable energy future

“…In addition, future use of hybrid high temperature fuel cell-gas turbine systems is likely to significantly contribute to much higher efficiency and much lower emissions coal-based central power plants with carbon sequestration (see e.g., [10,11]). …”

Application of a detailed dimensional solid oxide fuel cell model in integrated gasification fuel cell system design and analysis

“…Conceptual design and analyses of the integration of coal gasifiers with high temperature fuel cells have attracted much research interest around the world since the early 1990s and the results have clearly shown the potential of such systems for superior efficiency and emissions compared to other system approaches, including integrated gasification combined cycle (IGCC) systems [1][2][3][4][5][6][7][8][9][10]. Recently, IGFC systems that take advantage of more efficient catalytic gasifiers and the cooling caused by direct internal reforming (DIR) of CH 4 to reduce parasitic air compression load, have been proposed [11,12] and the electrical efficiency of such systems have been estimated to exceed or approach the U.S. Department of Energy (DOE) performance goal for next generation coal-based power plants: producing electricity at 60% efficiency (coal HHV basis) while capturing more than 90% of the inlet fuel carbon in a pure CO 2 stream [13].…”