Natural Gas / LNG (Liquid Natural Gas)

Natural gas has generally contain saturation water, hydrogen sulfide, organic sulfur (thiols), carbon dioxide and other impurities. In order to meet the need of natural gas gathering, liquefaction and cryogenic separation process, the impurity removal as far as possible is necessary so that the natural gas can reach the product gas use requirements.

Dehydration

The presence of moisture will notably make the NG dew point rise, so that ice is inevitably formed in the process of gas liquefied, pipeline transportation, or cryogenic separation; it may also forms hydrocarbon hydrates precipitate to block devices and pipes; it is more easily react with H2S, CO2, etc. in natural gas to corrode devices and pipes. Using molecular sieve in the depth dehydration of natural gas is the most widely used process.

Purification

H2S, CO2, etc. can react with water in the natural gas, which will cause pipeline and equipment corrosion; natural gas containing over-quantity H2S, CO2, etc. should be purified by molecular sieve before being utilized. BALNG4 special molecular sieve has been widely used in removing H2S, CO2 and other impurities in the natural gas.

Solutions

Molecular sieves are crystalline compounds created from alumina silicates, with controlled and precise structures, which contain pores of uniform size. These compounds have an affinity for various molecules, especially for polar compounds such as water, hydrogen sulfide and carbon dioxide. Molecular sieves can therefore be used for removing water from sour gas, or they can also be used for sweetening sour gas that exceeds the hydrogen sulfide specification by a few ppm.

An adsorption unit used for water removal in natural gas dehydration and sweetening is called a dehydration unit (DHU). A DHU often consists of two or more vessels, filled with molecular sieves, that adsorb water during an adsorption period and are subsequently regenerated using a heated stream of treated gas.

BALNG4 is specially designed molecular sieve high water adsorption and carbon dioxide capacity, excellent hydrothermal stability and good dynamic characteristic for natural gas dehydration.

Natural gas must be dehydrated to remove water vapor. Water vapor causes the formation of hydrates, over saturation of natural gas, and corrosion of equipment. The high pressure increases saturation and creates more water vapor. Hydrates cause freezing and blocking of pipelines, valves, and other equipment, bringing production to a halt. Oversaturated gas does not meet pipeline specifications, which must be removed in order to sell.

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