Optimization of Integrated Gasification Combined-Cycle Power Plant for Polygeneration of Power and Chemicals

Abstract

Efficient and flexible operation is essential for competitiveness in the energy market. However, the CO2 emissions of conventional power plants have become an increasingly significant environmental dilemma. In this study, the optimization of a steam power process of an IGCC was carried out, which improved the overall performance of the plant. CCPP with a subcritical HRSG was modelled using EBSILON Professional. The numerical results of the model were validated by measurements for three different load cases (100, 80, and 60%). The results are in agreement with the measured data, with deviations of less than 5% for each case. Based on the model validation, the model was modified for the use of syngas as feed and the integration of heat into an IGCC process. The integration was optimized with respect to the performance of the CCPP by varying the extraction points, adjusting the steam parameters of the extractions and modifying the steam cycle. For the 100% load case, a steam turbine power achieved increase of +34.2%. Finally, the optimized model was subjected to a sensitivity analysis to investigate the effects of varying the extraction mass flows on the output.

Gasification of Waste Machine Oil by the Ultra-Superheated Mixture of Steam and Carbon Dioxide

“…The first one is related to the gasification process efficiency. Remember that in [22,23], the measured average temperature of the wall of the flow reactor in the steady-state operation mode reached 700 • C. In the present study, the average temperature of the wall of the flow reactor was reduced to 490-570 • C (see Tables 6 and 7). Despite such a considerable decrease in the wall temperature, the contents of H 2 , CO, CH 4 , and CO 2 in the product syngas at the same flow rates of liquid feedstock and the same operation frequency of 1 Hz remained virtually unchanged.…”

“…Autothermal technologies use the gasification heat generated in the gasifier itself by adding oxygen or air to partially burn the feedstock. The share of the burned feedstock can be essential [23,24]. Allothermal technologies use heat for gasification supplied from an external source, such as heat exchangers, electric heaters, heat carriers, plasma arcs, etc.…”

Advanced Exergy, Exergoeconomic, and Exergoenvironmental Analyses of Integrated Solar-Assisted Gasification Cycle for Producing Power and Steam from Heavy Refinery Fuels

“…Szima et al [5] Techno-economic analysis of hydrogen and power production from the IGCC plant with the gas switching combustion (GSC) for carbon capture and membrane-assisted water gas shift (MAWGS) reactors to produce hydrogen. Bany Ata et al [2] Heat integration optimization and sensitivity analysis of an IGCC system based on lignite co-gasification and refuse-derived fuels for co-generating methanol and electricity. Muhammad et al [3] Thermodynamic and economic analysis of IGCC system for producing electricity, methane, and ammonia.…”

“…IGCC power systems provide improved economic viability to existing and new processing plants owing to their ability to generate power from syngas and additional high-valued utilities and feedstock chemical co-products (e.g., ammonia, methanol, etc.) from low-cost fuels [2,3]. Additional advantages include low production costs and the potential to meet tighter pollutant emissions standards on SO x , NO x, and particulates.…”

“…The construction, operation, and maintenance of IGCC plants are generally more demanding than conventional power systems, eliciting an increase in capital investment and maintenance expenses and a reduction in reliability and availability [7]. Typically, IGCCs allow obtaining higher thermal efficiency over conventional coal-fired power plants (up to 60% when fueled with natural gas [2,8]), while the carbon emissions are lower than traditional power plants [7]. Another important benefit of IGCCs is the reduction of other pollutants.…”