First catalyst bed feed gas

Figure 8.5 shows industrial catalytic converter (hence catalyst bed) diameters as a function of measured first catalyst bed feed gas volumetric flow rates. Bed diameters are between 8 and 16 m. They increase with increasing input gas flow rate. They are predicted well by the trendline equation on the graph. 

Industrial first catalyst bed feed gas typically contains O2 and SO2 in the ratio ... 

Metallurgical and spent acid regeneration gases contain CO2 from fossil fuel and spent acid impurities. CO2 concentrations in first catalyst bed feed gas are typically ... 

Alternatively, some cooled I0W-SO2 first catalyst bed exit gas can be recycled into the first catalyst bed feed gas stream. This is discussed in Chapter 27. 

SO2 and O2 concentrations in the second catalyst bed input gas are lower than in the first catalyst bed feed gas (Section 12.2). SO3 concentration is higher. Both of these tend to slow SO2 oxidation in the second catalyst bed. 

Metallurgical and waste acid regeneration acid plants usually use (d) to heat their cool first catalyst bed feed gas up to its specified input temperature. 

Tfeed = Enthalpy at the first catalyst bed feed gas temperature = Enthalpy at a temperature part way down the catalyst bed. 

A sulfur burning first catalyst bed feed gas contains 0.2 volume% SO3... 

First catalyst bed feed gas under the same conditions. 

Figure 18.3 Heatup paths and intercepts for 0 and 10 volume% CO2 first catalyst bed feed gas. CO2 heatup paths are steeper than non-C02 heatup paths because CO2 heat...

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