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    Ajay S. Satpute

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Chemical and Process Engineering Resources

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Category: The Environment
Question: What options are available for ammonia-on-demand systems to supply selective catalytic reduction systems?
Keywords: v1i7,ammonia-on-demand,ammonia,demand,scr,selective,catalytic,reduction,produce,onsite
Answer: Several companies have technology that utilize urea as a means to power an ammonia-on-demand (AOD) system. Two such companies are Hamon Research-Cottrell (research-cottrell-us.com) and Environmental Elements Corporation (www.eec1.com).The reason for this process is to avoid having to transport ammonia from one site to another. Most of these systems work via the hydrolysis of urea. Urea is dissolved in water and heated to about 148 ??C (300 ??F) at a pressure of about 6.8 bar (100 psig). As of 2001, capital cost for such a system where estimated at around $1000 USD / lb / h for a plant to produce up to 3,000 lb/h of ammonia.
Links: Environmental Elements Website

Hamon Research-Cottrell Website