| 摘要 |
A process is described for the passivation of the surfaces of heat exchange apparatus exposed to a synthesis gas containing carbon monoxide and hydrogen, including the steps of: (i) adding an arsenic compound to the synthesis gas at a temperature >=850° C. to generate volatile arsenic passivation species, (ii) exposing the mixture of hot synthesis gas and arsenic passivation species to surfaces on the shell-side of said heat exchange apparatus to reduce the interaction between the carbon monoxide present in said gas and metals said in said surfaces, (iii) recovering a cooled synthesis gas from the shell-side of said apparatus, and (iv) passing the cooled synthesis gas, optionally after further cooling, through a sorbent bed to remove arsenic compounds from the synthesis gas.
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