Daily questions on oil refining knowledge (12.6)
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This post was last edited by zlj on 2009-12-6 10:19. Today I asked a question: The unit of hydrogen sulfide content in liquefied gas is ppm. Is it (V/V) or (m/m)?
Personally, I feel that gas is generally V/V.
ppm is the volume concentration (generally, the volume concentration is used for gas components, and the mass concentration is used for liquid and solid components)
It should be V/V, and gas is generally the volume content.
This should refer to the volume. The unit ppm * * It has been abolished and is no longer allowed to be used.
ppm: Refers to the volume of pollutants contained in one million volumes of air, and is an expression of volume concentration. The gas concentration measured by most gas detection instruments is volume concentration (ppm). According to our country's regulations, especially the environmental protection department, gas concentration is required to be measured in units of mass concentration (such as: mg/m3) means that we * * The standard specifications also use mass concentration units (such as: mg/m3) expressed. http://bbs.hcbbs.com/viewthread.php?tid=354685 (explained in )
The unit of hydrogen sulfide content in liquefied gas is ppm, which is the volume ratio (V/V). Product quality standard requirements: The total sulfur content is mg/m3 according to the petrochemical industry standard SH/T0222, and the requirement is not to exceed 343mg/m3.
It is usually said that the unit of hydrogen sulfide content in liquefied gas is ppm, which refers to the volume ratio (V/V).
1# www1120m/m