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Within the scope of this research project, studies on a laboratory scale centred around the influence of individual parameters on desulphurisation and NO reduction by means of brown coal coke. It was demonstrated that brown coal coke is very suitable for desulphurisation of flue gases. In order to achieve an optimum SO(2) adsorption of coke it is necessary to ensure reaction temperatures of below 100 C. In addition, the studies have demonstrated that brown coal coke has catalytic properties favouring NO reduction by means of NH(3); in this process, the NO conversion rate increases with a growing NO portion. This rate, however, shows a steep fall at temperatures exceeding 120 C. Investigation of simultaneous desulphurisation and NO reduction has shown that the reaction conditions for the two flue gas treatment processes are too different for simultaneous implementation of the two processes to be advisable. Each process alone, however, can be carried out successfully on the basis of brown coal coke. The application of brown coal coke for flue gas cleanup in industrial-scale plants is aimed at implementing closed systems. After adsorption, the laden coke could possibly be used as a source of energy in thermal processes or as a carrier of valuable substances which are to be recovered and reused.

Additional information

Authors: PÄFFGEN H P, Rheinische Braunkohlenwerke AG, Köln (DE);FABER W, Rheinische Braunkohlenwerke AG, Köln (DE);LENZ U, Rheinische Braunkohlenwerke AG, Köln (DE);PAFFGEN H P, Rheinische Braunkohlenwerke AG, Koln (DE)
Bibliographic Reference: EUR 13052 DE (1990) 56 pp., MF, ECU 4
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