Selection of gas mass flow meters
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I want to measure the mass flow rate of a mixed gas, primarily hydrogen and carbon dioxide, with small amounts of methanol and water vapor as well. The temperature is 250°C and the flow rate is around 5 kg/h. What type of mass flow meter would be suitable for this purpose? Would a thermal mass flow meter work?
As long as the water content is unstable and there is dirt, thermal methods are not suitable. With such a low flow rate, only a mass flow meter will do, and it’s best to use an imported one
Your operating conditions are quite special. First, with a mixed gas whose proportions change frequently, many flow meters are not suitable for use. Second, the temperature reaches 250 degrees, which makes things even more difficult. Finally, the usual flow rate is only 5 Kg/h – a very low flow rate, which adds to the challenges. Suggestions: 1. First, for high-temperature Coriolis mass flow meters, a calibrated orifice plate might suffice ； 2. If the above methods do not work, the weighing method can be used, by weighing the reactor and other containers as a whole.