You now work for the new biogas company ‘WhiffGen’ who are scaling up a process to take waste bio materials and produce solid fuel pellets for biomass boilers. As a part of the feedstock treatment, chloride is removed as this would cause corrosion and possible dioxin generation in the biomass boilers. This chloride removal process produces a waste gas stream containing hydrogen chloride acid gas at 7% by volume in dry air.The packed column is to treat 175 m3 s-1 of the hydrogen chloride gas stream to a concentration of 0.3% by volume. The water used is high purity and is to have a concentration of 5% by weight after being passed through the column. Draw a simple block diagram of the column with the input and output streams labelled and calculate the volumetric flow rate of gas leaving the column.

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