• amine unit
    Natural Gas - English

    the Technologies of Natural Gas Sweetening

    Natural Gas Sweetening Natural gas may contain high quantities of hydrogen sulfide H2S and/or carbon dioxide CO2. The presence of these compounds renders the gas a sour gas. This is specially because sulfur has such negative effects on the quality of the produced gas, that the concentration of both components have to be reduced from the gas flow before being put into the distribution conducts for the users. The regulations allow a maximum of H2S equal to 0,002 gr./Nmc (1,31 PPM).The amount of CO2 in the gas produced will depend in the amount required by the regulations. Typical values allow a maximum concentration of carbon dioxide and other inerts to…

  • LNG plant
    Natural Gas - English

    LNG Liquefaction and Purification Processes

    Introduction to LNG Processes  The refrigeration and liquefaction sections of any LNG project are very costly items of equipment. A number of cycles have been developed to achieve the low temperatures required. Brief descriptions of a small number of process routes will be give. Some twelve countries were operating by 2003. The cycles employed are the classical cascade, the mixed refrigerant and the propane pre-cooled mixed refrigerant. The process selected must ensure high onstream factors, reliability of equipment, flexibility and ease of operations and guaranteed capacities. Small differences in projected thermodynamic efficiencies are usually less than the uncertainties in equipment performance. A proper choice must be made between the use of…

  • natural gas storage
    Natural Gas - English

    Sweet Gas – Acid Gas – Condensate Gas what these terms mean?

        A natural gas is called sweet gas if it has no sour components such as H2S, CO2, mercaptans, but is almost exclusively composed of methane, low amounts of ethane, propane, inert gases (N2) and traces of heavier hydrocarbons. It is generally saturated in water at reservoir temperature and pressure. A natural gas is usually defined as sour when it contains hydrogen sulphide (H2S) and/or carbon dioxide (CO2). A condensate gas reservoir can be defined as a reservoir in which temperature is between critical temperature and cricondenthermal point (maximum temperature at which coexistence of the two phases is still possible) for the particular natural hydrocarbon system it contains. At this point it is useful to outline…