June 2001

Process Optimization

Predict contaminant concentrations in deaerator-vent emissions

Here is a tool to estimate maximum concentrations of contaminants in hydrogen-plant condensate

Baade, W. F., Kunz, R. G., Air Products and Chemicals, Inc.

Many major industrial-emission sources to atmosphere have been controlled. Thus, the lesser nature point sources are now under scrutiny, especially for petrochemical processes.1 One such emission point is the steam vent from the deaerator vessel in a steam-methane reformer's (SMR's) boiler feedwater treatment system. Atmospheric contaminants, in parts per million by volume (ppmv), are formed during hydrogen production and released to atmosphere with vented steam.2 Other typical points where such contaminants can escape are the export steam and boiler blowdown. To propose the most cost-effective treatment, we must determine the flowrate and composition of the contaminant species in the retu

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