Abstract
This study is concerned with the production of ashless coal (called as Hypercoal, HPC) by the extraction of pure coal effective for combustion from raw coal and the construction of high efficient compound cycle electric power generation system by injecting the HPC directly to gas turbine in order to reduce CO_2 emissions. The HPC with 200ppm of ash content and 0.5ppm of alkali (Na+K) content was produced by removing ash with 1-Methyl naphthalene (1MN) and alkali with inorganic ion-exchange material. The burnout time of HPC with 10μm diameter was estimated as below 0.1 seconds by the simulation of gas turbine combustion. As a result of LCA on the CO_2 load of this system, namely HPC direct combustion gas turbine power generation system with 48% of net thermal efficiency, 20% of CO_2 emissions reduction can be expected comparing with the conventional PCF system.
