What Are The Properties Of Refrigerant Absorbent Pair?

What Are The Properties Of Refrigerant Absorbent Pair? Refrigerant should be much more volatile than absorbent. Refrigerant properties must provide moderate +ve pressures same as VC. Both should be chemically stable at all operating conditions same as VC. What are refrigerant pairs? Case Studies: Natural Refrigerant Pair The natural refrigerants which have been considered here