A Magnetically Recoverable Fe 3 O 4 -NH 2 -Pd Sorbent for Capture of Mercury from Coal Derived Fuel Gas

• Published in: Scientific reports Vol. 7; no. 1; p. 7448
• Main Authors: Han, Lina, Li, Qinglian, Chen, Shuai, Xie, Wei, Bao, Weiren, Chang, Liping, Wang, Jiancheng
• Format: Journal Article
• Language: English
• Published: England 07.08.2017
• ISSN: 2045-2322

A sort of magnetical material named Fe O -NH -Pd was prepared by loading varying amounts of immobilizing Pd on the surface of the magnetic Fe O -NH microspheres. This magnetical material was used firstly for capturing Hg° from coal derived fuel gas based on its recoverability. The experimental results showed that the loading Pd on the amine-functionalized magnetite nanoparticles can greatly improve the efficiency of removing Hg° at a high temperature range between 200 and 300 °C. The magnetic Fe O -NH -Pd sorbent with 5% Pd loaded exhibited significantly high activity and stability in capturing Hg°, affording over 93% capture efficiency at 200 °C for more than 8 hrs. Compared to the Fe O -NH sorbent that converted the Hg° as HgS, this Fe O -NH -Pd sorbent can remove the Hg° by forming Pd-Hg amalgam and HgS. In addition, the experimental tests indicated that the as-synthesized Fe O -NH -Pd sorbent still showed stable magnetic properties after two regeneration cycles in removing Hg°, which provided the opportunity for preparing a recyclable sorbent which can be easily separated and recovered for Hg° removal.