Abstract: | A series of iron-based sorbents prepared with iron trioxide hydrate, cupric oxide by a novel method was studied in a fixed-bed
reactor for COS removal from syngas at moderate temperature. In addition, the sorbents mixed with various additives in different
ratios were tested. The effects of additive type and ratio on the breakthrough capacity and desulfurization performance, as
well as the influence of operating conditions on sulfidation behavior of the sorbent, were investigated. The simulate gas
contained 1% COS, 5% CO2, 20%–30% CO and 60%–70% H2. The outlet gases from the fixed-bed reactor were automatically analyzed by on-line mass spectrometry, and the COS concentration
before breakthrough can be kept steady at 1 ppmv. The result shows that the breakthrough sulfur capacity of the sorbent is
as high as 25 g-S/100 g. At 700 K and space velocity of 1000 h−1, the efficiency of sulfur removal and breakthrough sulfur capacity of the sorbent increase with the increase of copper oxide
with an optimum value. The result shows that the species and content of additives also affect desulfurization performance
of the sorbent. |