manufacture of a range of products, including foodstuffs, like instant coffee and powdered
milk, household detergents, pharmaceuticals, or carbide particles for the manufacture of
cutting tools (Masters, 1991). The process is energy intensive. Only in the UK it was
estimated that around 1986 about 500 000 ton of coal equivalent were consumed every year
for spray drying (Mercer, 1986). It was also estimated that on average around 29% of the …