Effects of preparation method on MnO x-TiO2 sorbent for Hg0 removal
ZHANG Zhihui
LU Hao
ZHANG Anchao
WEN Xiaoping
ZHOU Changsong
SUN Lushi
Abstract：Aiming at the difficulty of Hg0 removal from flue gas because of its indissolubility in water,the MnOx-TiO2 sorbents were pre-pared by hydrothermal synthesis method(HT)and deposition-precipitation method(DP)and characterized by N2 adsorption/desorption, TEM,XRD,H2-TPR and XPS. The Hg0 capacities of the two sorbents were investigated in a laboratory-scale fixed-bed reactor. The re-sults showed that the physical characteristic wasn’t the main contributor for higher Hg0 removal. The Hg0 capacity of MnTi-DP was about 620 μg/g which was greatly higher than that of MnTi-HT(236 μg/g). It indicated that the preparation method had a great influence on sorbent performance. The Mn4+ content in MnTi-DP was 34%,while it was 22% in MnTi-HT. The higher intensity of chemisorbed oxygen and lattice oxygen in MnTi-DP showed that there was more total chemisorbed oxygen in MnTi-DP than that in MnTi-HT. A lot of chemi-sorbed oxygen enhanced the reduction ability of sorbent which played an important role in Hg0 removal.
Keywords：manganesemercury removalhydrothermal synthesis methoddeposition-precipitation method
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 72-76 )