Help needed: issue with high-concentration gas input

In Aspen, volumetric flow rate is usually used instead of mass flow rate when entering the gas flow rate. Therefore, when dealing with the issue of high-concentration gas input, we need to convert the mass concentration of the gas into a volume fraction. The relative molecular mass of acetic acid is 60.05 g/mol. Assuming that the temperature and pressure of the inlet gas are both at standard conditions (25°C and 1 atm), the ideal gas law PV = nRT can be used for calculations. First, we need to calculate the molar mass (M) of acetic acid: M = 60.05 g/mol. Next, we convert the given gas concentration (50000 mg/m3) into a mass fraction (X): X = (50000 mg/m3) / M. Finally, using the ideal gas law, we calculate the volume flow rate (Q) of the gas: Q = X * V * P / (R * T), where V is the volume of the gas involved (in m3), P is the pressure of the gas (in atm), R is the ideal gas constant (8.314 J/(mol·K)), and T is the temperature of the gas (in K). Note that in Aspen, the volume fraction required to be entered must not exceed 1; therefore, if the calculated volume fraction exceeds 1, it is necessary to adjust the volume or concentration of the gas being used, or make appropriate adjustments based on the actual conditions. .