Question

Which gasifier equipment has inability to operate on a number of unprocessed fuels?

(a) Counter current gasifier

(b) Cross draught gasifier

(c) Co-current gasifier

(d) Fluidized bed gasifier

This question was posed to me in class test.

The above asked question is from Applications of Biogas & Gasifier topic in section Biomass Energy of Energy Engineering

Answer 1

The correct answer is (c) Co-current gasifier

Best explanation: Down draught gasifier or co-current gasifiers equipment lies in its inability to operate on a number of unprocessed fuels. In particular, fluffy, low density materials give rise to flow problems and excessive pressure drop and the solid fuel must be pelletized before use.