Posts by Johndavid123

  • CNG ships soon?

    Sea NG Corporation announced today that the American Bureau of Shipping ("ABS") has approved for construction its Coselle compressed natural gas ("CNG") ship. This is the first ship and cargo system in the world for the transport of CNG to be so approved by ABS or any other international marine classification society.A major advantage of the Coselle CNG System is that it requires minimal on-shore facilities. Gas can be loaded and discharged at simple port-side pipeline facilities, which greatly reduces environmental, land-use and financial concerns. Gas can also be trans-shipped at offshore buoys if a port is not accessible. The potential market for the Coselle CNG ship is substantial... :)

  • The Basics of Liquefied Natural Gas LNG

    Liquefied Natural
    Gas, or LNG, is natural gas in
    its liquid form. When natural gas is cooled down to minus 259 degrees
    Fahrenheit (or -161 degrees Celsius), it becomes a clear, colorless,
    odorless liquid. Natural gas in liquid form, is only one six-hundredth
    of the volume of its gaseous form, which makes it easier to be stored
    and transport.
    The natural gas is primarily Methane, with low
    concentrations of other Hydrocarbons,
    water, Carbon dioxide, nitrogen, oxygen and
    some sulfur compounds. During the process known as liquefaction,
    the natural gas is cooled down below its boiling point, and in the
    process removing most of these additional compounds. The remaining gas
    is primarily methane with only low amounts of other hydrocarbons.
    Liquefied
    natural gas weighs less than half the weight of water so it will float
    if spilled on water.

  • How Oil Refining Works?

    The Refining Process

    a barrel of crude oil has a mixture of all sorts of hydrocarbons in it. Oil refining separates everything into useful substances. Chemists use the following steps:

    1. The oldest and most common way to separate things into various components (called fractions), is to do it using the differences in boiling temperature. This process is called fractional distillation. You basically heat crude oil up, let it vaporize and then condense the vapor.
    2. Newer techniques use Chemical processing on some of the fractions to make others, in a process called conversion. Chemical processing, for example, can break longer chains into shorter ones. This allows a refinery to turn diesel fuel into gasoline depending on the demand for gasoline.
    3. Refineries must treat the fractions to remove impurities.
    4. Refineries combine the various fractions (processed, unprocessed) into mixtures to make desired products. For example, different mixtures of chains can create gasolines with different octane ratings.
    5. The products are stored on-site until they can be delivered to various markets such as gas stations, airports and chemical plants. In addition to making the oil-based products, refineries must also treat the wastes involved in the processes to minimize air and water pollution.