Emission control like damage

We make no attempt to assign an annual cost of SO2 damage to historic buildings. It is considered that the benefits to be gained from emissions control are likely to be often large in relation to the size of the local economy and the cost of local emissions control, but small in relation to overall building damage costs, and certainly within the error of their calculation. 

Compared to a fired reformer, catalyst tube damage is less likely. This is because direct flame impingement cannot occur, and flue gas distribution is not a concern. The maximum tube metal temperature is also limited to the temperature of the shell-side gases. Since die reformer burners have been eliminated, process control is less complicated. And the lack of a flue gas stream reduces emissions of NOx and C02 by as much as 60% to 75%203. 

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