Subtask 2.8 - Control of Trace Elements in Gasification Systems

[摘要] Detailed investigations were carried out to investigate the removal of mercury using a variety of substrates at elevated temperature under reducing conditions. Sorbents tested mainly comprised 6A, 7A, 1B, 2B, and metals from the periodic table. The new high-surface halogen-treated carbon sorbents performed exceptionally well on the bench scale at relatively high temperatures (400 C). The new sorbents could be incorporated into a gas cleanup technology for fuel gas, where the gas is cooled to medium temperatures. Other work in this task focused on halogen-containing sorbents prepared on a carbon support. Similar sorbents had been previously found to be superior for mercury in flue gas. All granular sorbents were conducted in fixed beds heated at 350 and 400 C with 10 vol% hydrogen in a nitrogen stream containing 34.8 {mu}g/m{sup 3} of Hg{sup 0}.

[发布日期] 2009-03-28

[学科分类] 再生能源与代替技术

[关键词] CARBON;ELEMENTS;FLUE GAS;FUEL GAS;GASIFICATION;HYDROGEN;MERCURY;NITROGEN;PACKED BEDS;REMOVAL;SUBSTRATES;TRACE AMOUNTS