Advanced Gasification Mercury/Trace Metal Control with Monolith Traps. Final Scientific/Technical Report for Year 1 (July 1, 2005-February 28, 2007)

摘要

Three potential additives for controlling mercury emissions from syngas at temperatures ranging from 350 degrees to 500 degrees F (177 degrees to 260 degrees C) were developed. Current efforts are being directed at increasing the effective working temperature for these sorbents and also being able to either eliminate any potential mercury desorption or trying to engineer a trace metal removal system that can utilize the observed desorption process to repeatedly regenerate the same sorbent monolith for extended use. Project results also indicate that one of these same sorbents can also successfully be utilized for arsenic removal. Capture of the hydrogen selenide in the passivated tubing at elevated temperatures has resulted in limited results on the effective control of hydrogen selenide with these current sorbents, although lower-temperature results are promising. Preliminary economic analysis suggests that these Corning monoliths potentially could be more cost-effective than the conventional cold-gas (presulfided activated carbon beds) technology currently being utilized.