The products to be spray dried can be categorized into two major
groups: non-sticky and sticky products. Sticky products are generally
difficult to spray dry. During the drying process they may remain as
syrup or stick on the dryer wall, or form unwanted agglomerates in
the dryer chamber and conveying system (Bhandari & Howes, 2005;
Hennings, Kockel, & Langrish, 2001). The problem of powder
stickiness is mainly due to the low glass transition temperature (Tg)
of the low molecular weight sugars present in such products,
essentially sucrose, glucose, and fructose