The syngas from gasification mainly contains carbon monoxide
(CO) and hydrogen (H2). Overall DME synthesis reactions consist
of 3-step reactions: methanol synthesis, dehydration and water gas
shift (WGS) reaction as following reactions. The formation of methanol is considered by two reaction mechanisms as illustrated in both
reaction (1) and (2); reaction (1) is the formation of methanol participating CO and H2 as major reactants. This reaction emits high
reaction enthalpy. While reaction (2) is led to by participating CO2
and H
2, it has less reaction enthalpy than reaction (1). It is assumed
that both reactions can proceed to produce methanol simultaneously
in this study