With the object to produce a low-sulfur coal by nitric leaching, resea
rch was undertaken on the influence of the different process parameter
s, such as temperature, time, acid concentration, particle size and ph
ysical pretreatment on sulfur decrease, nitrification of the product,
loss of calorific value and variation in ash composition for a Spanish
coal. Copyright (C) 1996 Elsevier Science Ltd.