Pressurized drop tube furnace tests of global coal gasification characteristics

High ash coal pyrolysis at different heating rates to analyze its char structure, kinetics and evolved species

“…The maximum temperature and the heating rate are varied in different coal utilization processes. Coal devolatilization is continued for several hours (with a heating rate of 10 −1 to 10 1 K/s) in a coking plant, order of few seconds or less (with a heating rate of 10 2 -10 4 K/s) in the processes of gasification or combustion [7], and within several milliseconds (with a heating rate of 10 4 -10 6 K/s) in a plasma process [8,9]. Hence, the basic information of coal pyrolysis under different heating rate and ultimate temperature is required to establish efficient coal utilization processes.…”

Lignite-char gasification mechanism in mixed atmospheres of steam and CO 2 at different pressures

“…However, most of the work was conducted under atmospheric pressure [24,25]. Approximately, lignite accounts for 40% of global coal reserves [26], and its rational utilization is of importance in synthetic natural gas (SNG), integrated gasification combined cycle (IGCC), coal to liquid (CTL), and chemical products.…”

Experimental investigation on coal devolatilization at high temperatures with different heating rates

“…However, the ultimate temperature and the heating rate are much different in different coal utilization processes. Coal devolatilization is finished in several hours (with a heating rate of 10 À1 to 10 1 K/s) in a coking plant, within a few seconds or less (with a heating rate of 10 2 to 10 4 K/s) in the processes of gasification or combustion [10], and within several milliseconds (with a heating rate of 10 4 -10 6 K/s) in a plasma process [11,12]. Thus, if the fundamental knowledge of coal pyrolysis under different heating rate and ultimate temperature as well as the relationship among these coal utilization processes are well established, a simple, quick method of coal rank preliminary selection for the industrial plasma technology could be proposed.…”