Inorganic routes for the production of methanol are not new and the same procedure of converting carbon dioxide/carbon monoxide and hydrogen to methanol is followed in this work as has been reported in literature previously. The novelty of this work lies in the procurement process for carbon dioxide and hydrogen whereby newer raw materials like limestone, orthophosphoric acid metallic zinc and hydrochloric acid has been utilized producing the carbon dioxide and hydrogen streams. Another innovation is the separation of the reaction producing carbon monoxide from carbon dioxide from the main methanol synthesis reaction scheme where the two reactions are carried out in different chambers at two different temperatures and pressures. The results of the simulation work show that both the quantity and quality of the methanol produced is a strong function of the temperature of the first reaction and the temperature as well as the pressure of the second reaction.