What are dry gas, lean gas, rich gas and liquefied petroleum gas?
Dry gas refers to the petroleum gas which does not contain any components which are easily liquefied at normal temperature and pressure. It mainly contains methane and ethane. Sometimes the lean gas after being absorbed is called dry gas. Rich gas refers to the petroleum gas containing a lot of LPG and the gas mixture before being absorbed in the gas absorption process. LPG refers t the light hydrocarbons in gas state at normal temperature and pressure can be liquefied at a certain pressure. The components are propane and butane and their mixture. Sometimes propylene and butylene are also included.