Development of a zero emission integrated system for co-production of electricity and methanol through renewable hydrogen and CO2 capture

Abstract

In order to decrease CO2 emission into the atmosphere and develop renewable energy sources for carbon capture, an integrated system is considered for co-production of electricity and methanol. In this research, methanol synthesis unit through captured CO2 from fossil fuel power plant and produced H2 from water electrolysis unit by wind renewable energy is developed. An oxy-fuel combustion carbon capture method is considered in large scale Matiant power plant based on utilization of oxygen from water electrolysis unit. Technical and economical analysis of the proposed system shows that when the price of natural gas is 7.8US$/GJ, the total CO2 avoided cost is 93US$/(tonne of CO2) and methanol production cost is 576US$/(tonne of methanol). The outcome of the integrated system will be 582 millionkWh/year electricity and 228,480 (tonne of methanol)/year with no greenhouse gases exhausted into the atmosphere.