A second-law analysis is presented to assess the environmental impacts
of the simultaneous generation of a fuel gas and electric power from
coal. The analysis is based on the life-cycle evolution of exergy cont
ained in successive energy carriers involved in the process. The impac
t on the environment is quantified in terms of defined indexes of envi
ronmental efficiency and hazard. Particular hazards associated with th
e process are evaluated and compared for low-and high-sulphur coals. (
C) 1998 Elsevier Science Ltd. All rights reserved.