| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials Engineering -- From Ideas to Practice: An EPD Symposium in Honor of Jiann-Yang Hwang
|
| Presentation Title |
Mercury Removal by Bio-chars with Plasma Surface Modification |
| Author(s) |
Jinjing Luo |
| On-Site Speaker (Planned) |
Jinjing Luo |
| Abstract Scope |
Bio-char samples were modified by the dielectric barrier discharge (DBD) plasma method to enhance the adsorption capacity for gaseous mercury (Hg0). Cl and O active sites were introduced onto biochar surfaces by hydrogen chloride non-thermal plasma and simulated air non-thermal plasma respectively. Surface modified biochar was then placed in flue gas with typical components to investigate its elemental mercury (Hg0) capture ability. To elucidate the adsorption mechanism & binding properties, samples were characterized by N2 adsorption, SEM-EDS, XPS, Hg-TPD and X-ray absorption near edge structure (XANES) analysis of Hg LIII-edge, Cl K-edge and S K-edge. Experimental results showed that plasma modification altered the surface structure and organic chlorides generated on biochar surface. Qrganic chlorides, organic sulfur, lactone group and carboxyl group were assumed to be the main active sites to react with Hg. XANES spectra revealed that adsorbed-Hg on HCl-treated biochar mainly in the form of Hg+. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Environmental Effects, Surface Modification and Coatings |