Combined temperature controlled water adsorption and two stage heat pump process for fuel ethanol dehydration

A process for dehydration of a process stream for the production of motor fuel grade ethanol, the process comprising:

• separating a fermentation beer stream in a solids separation unit to provide a bottoms stream including solids, and a process stream including ethanol and water;
• providing the process stream to a first temperature controlled adsorber that is undergoing adsorption, where the first temperature controlled adsorber has one or more adsorption flow passages containing an adsorptive material coating and one or more heat transfer flow passages;
• passing the process stream through the one or more adsorption flow passages, where water is adsorbed by the adsorptive material coating to produce an MFGE product stream;
• generating heat of adsorption in the one or more adsorption flow passages of the first temperature controlled adsorber;
• removing heat of adsorption by passing a cooling fluid through the one or more heat transfer flow passages to produce a heated cooling fluid;
• providing heat from the heated cooling fluid to a first heat sink;
• providing a second temperature controlled adsorber that is isolated from the process stream and is undergoing regeneration, where the second temperature controlled adsorber has one or more adsorption flow passages containing an adsorptive material coating and one or more heat transfer flow passages;
• providing a heating fluid to the one or more heat transfer flow passages of the second temperature controlled adsorber;
• regenerating the adsorptive material coating by removing water to produce a regeneration effluent stream;
• and
• providing heat from the regeneration effluent stream to a second heat sink.