Is it the mass or volume of water on a wet basis?
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Component Gas flow rate m3(Norm)/h (V)% ∑ on a dry basis 267200.15 100.00 Water 582.78 ∑ on a wet basis 267782.93 Temperature 22.74 Pressure 3.46 The data above are for the feed gas used in the desulfurization process. I would like to ask the experts whether the term “standard condition” in the table refers to standard conditions or standard status? Is the water content a mass or a volume flow rate? If it’s quality, then how can it be added together? If it’s volume, then why is the water content in the transformed gas so high? Can the volume under standard conditions be converted to values under operating conditions using the gas law?
1. There are three standard states for gases: 1. The standard state defined by the 10th General Conference on Weights and Measures (CGPM) in 1954 is a temperature of 273.15 K (0°C) and a pressure of 101.325 KPa. This standard state is widely adopted in the field of science and technology around the world. 2. The International Organization for Standardization and U.S. **standards specify 288.15 K (15°C) as temperature and 101.325 KPa as pressure to serve as the standard conditions for measuring the volumetric flow rate of gases. 3. China’s \"Standard Orifice Plate Calculation Method for Natural Gas Flow Rate\" specifies that a temperature of 293.15 K (20°C) and a pressure of 101.325 KPa are to be used as the standard conditions for measuring the volumetric flow rate of gas. (From this forum, gjl671029) Personally, I lean towards the first option, as most reference data tools these days use this standard. 2. Based on the data you provided, I personally think it should be volume, and that under standard conditions. It might be because the provider’s computer didn’t have the unit connected. Otherwise, the subsequent data will not simply add up. 3. As for the temperature and pressure data, they represent the conditions in actual production. 4. A gas equation of state can be established, but it is only for reference; as for the correction coefficients, one has to derive them through continuous practical experience.
This post was last edited by z880347730 on 2009-6-21 11:41. Tag: Standard status； At standard conditions/22.4 gives the molar amount directly! And as you mentioned above, it’s a meteorological phase, so of course it’s a gas!
In chemical calculations, it generally refers to the molar mass~!
I also prefer the standard state, because molar mass is used in all calculations! !