Removal of hydrogen sulphide and ammonia in coal gasification power generation systemsFunded under: ECSC-COALRES 3C
Within the European Union, demonstration scale coal gasification systems are being built, designed or operated. For such advanced systems, there is a need for efficient removal of dust, sulphides, ammonia, cyanides and halides from fuel gas. Collaborative work between three partners has found that hot gas systems are comparably efficient at reducing harmful emissions from fuel gas as wet gas systems. The low temperature wet gas cleaning system has adverse effects on cycle efficiency, high capital costs and produces an aquaeous effluent which needs expensive treatment before disposal. The hot gas cleaning system offers potential lower costs with cycle efficiency advantages. To operate, it needs temperatures of 300-600oC and pressures of 10-25 bar. The project investigated a range of sulphide removal sorbents and ammonia reduction catalysts over a range of conditions that was relevant to various combined cycle coal gasification technologies. For example a hot gas ammonia reducing system was installed by British Coal on an existing pilot scale gasifier and catalysts were tested in order to identify potential sorbent poisons in the fuel gas. Such technologies have the potential to achieve the same efficiency of removal as wet gas cleaning techniques but with increased efficiency of power production.
Bibliographic Reference: EUR 17926 EN (1998) 118pp.
Availability: Available from OOPEC Sales agents
Record Number: 199910034 / Last updated on: 1999-02-11
Original language: en
Available languages: en