Petroleum coke as a kind of by-product in petrochemical industry was chosen to prepare the mercury removal adsorbent with high sulfur and activity by SO2 activation. The effects of adsorption temperature

inlet Hg0 concentration

flue gas composition and thermal regeneration on mercury removal characteristic were investigated in a fixed bed reactor system. Meanwhile

the removal mercury mechanism was put forward by applying characterization methods

including surface area and porosity analyzer

elemental analyzer and X-ray photoelectron spectroscopy (XPS). The experimental results showed that the physical and chemical properties of SAPC were significantly improved. And carbonyl

ester and non-oxidized sulfur were the main active sites of Hg0 capture. Furthermore

the mercury removal capacity decreased with increasing adsorption temperature. The mercury adsorption rate was faster

while the initial mercury removal efficiency became lower at elevated initial Hg0 concentration. SO2 had unconspicuous effect on mercury removal. Hg0 on or close to surfaces was oxidized by the adsorbed oxygen

and mercuric ions were more readily bound to sulfur via the Hg-S bond

while some will bind to oxygen. The absorption capacity of regenerated petroleum coke was weakened because of the loss of active sites in the regeneration process.