API MPMS 19.4-2012
石油测量标准手册第 19.4 章蒸发损失参考信息和形态方法(第三版;包括附录 1:2013年11月)

Manual of Petroleum Measurement Standards Chapter 19.4 Evaporative Loss Reference Information and Speciation Methodology (Third Edition; Includes Addendum 1: November 2013)


 

 

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标准号
API MPMS 19.4-2012
发布
2012年
发布单位
API - American Petroleum Institute
当前最新
API MPMS 19.4-2012
 
 
适用范围
This standard provides methodology to estimate emissions of individual hydrocarbon species using the total emissions of multicomponent hydrocarbon mixtures (such as crude oils and gasoline) estimated from API MPMS Ch. 19.1 for fixed-roof tanks@ API MPMS Ch. 19.2 for floating-roof tanks@ API MPMS Ch. 19.5 for marine vessels@ and other methods used for total hydrocarbon emission estimates. This process is referred to as speciation. Speciation of emissions from hydrocarbon mixtures accounts for the higher evaporation rate of the more volatile components@ resulting in a different composition of the mixture in the vapor phase than in the liquid phase. The methodology presented in this standard assumes that there is sufficient liquid present such that the chemical composition at the liquid surface may be considered to not change as a result of the evaporative loss. This standard also contains reference information used for estimating emissions in accordance with API MPMS Ch. 19.1@ API MPMS Ch.19.2@ and API MPMS Ch.19.5. The methodology in this standard applies to: a) liquids with vapor pressure that has reached equilibrium with ambient conditions at a true vapor pressure less than the ambient atmospheric pressure (i.e. not boiling); b) liquids for which the vapor pressure is known or for which sufficient data are available to determine the vapor pressure; c) liquid mixtures where Raoult's Law can be used to describe the vapor phase equilibria. This methodology does not apply to: a) emissions that result from leaks from piping components (e.g. valves@ flanges@ pumps@ connectors etc.); b) liquid mixtures where Raoult's Law cannot be used to describe the vapor phase equilibria (e.g. mixtures in which hydrocarbons are dissolved in water@ or mixtures of hydrocarbons with alcohols).

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