... heavy oil , impurity out of oil gas with two tanks . Gas separate and depositing tank are enough ... reactor , high temperature can change them from solide to liquid , then to gas. We call it oil gas . they ... and high oil yied .4, Waste gas recycle systemHow to deal with waste gas ? We can not store them , ... we use tyres or plastics to refine oil , carbon black are produced . How could we get out of ...