Vanadium silicate (EVS)-supported silver nanoparticles: A novel catalytic sorbent for elemental mercury removal from flue gas

Zhou, Zijian1; Cao, Tiantian2,3; Liu, Xiaowei1; Xu, Shengming3; Xu, Zhenghe3,4; Xu, Minghou1

2019-08-05

10.1016/j.jhazmat.2019.04.062

JOURNAL OF HAZARDOUS MATERIALS   影响因子和分区

0304-3894

1873-3336

Vanadium silicate (EVS) is a vanadium-substituted form of titanosilicate that has a high potential for use as a sorbent for mercury removal. In the present study, EVS with supported silver nanoparticles (EVS-Ag100) as the catalytic sorbent was synthesized for elemental mercury (He degrees) capture. The physical and chemical properties of the sorbents were investigated. The raw EVS exhibited a poor Hg degrees capture capacity (7.7 mu g g(-1)), because most of the vanadium species in the structure of EVS were V. The loading of the silver could significantly enhance the Hg degrees capture capacity (63.4 mu g g(-1)). EVS-Ag100 exhibited a superior He capture performance at temperatures of approximately 150 degrees C. Silver nanoparticles that formed on the EVS were the active sites. In addition, the vanadium species of EVS-Ag100 exhibited higher Hg degrees oxidation activity than those in the framework of raw EVS. The XPS results revealed the activation of the vanadium species by the silver nanoparticles. After the capture of Hg degrees in the presence of O-2, more V5+ was observed on the surface of EVS-Ag100. Exposure of EVS-Ag100 to a continuous simulated flue gas at 150 degrees C with a gas hourly space velocity of 220,000 h(-1) led to Hg degrees removal efficiency of > 96% in a 1 h test.

Catalytic sorbent Elemental mercury removal Vanadium silicate Silver nanoparticles Coal-fired flue gas

SCI ; EI

英语

通讯

China Postdoctoral Science Foundation[2018T110762] ; China Postdoctoral Science Foundation[2017M622439]

Engineering ; Environmental Sciences & Ecology

Engineering, Environmental ; Environmental Sciences

WOS:000472243100001

ELSEVIER SCIENCE BV

20192607122427

Flue gases ; Flues ; Metal nanoparticles ; Silicates ; Silver compounds ; Sorbents ; Sorption ; Synthesis (chemical) ; Vanadium compounds

Air Pollution Sources:451.1 ; Nanotechnology:761 ; Chemical Reactions:802.2 ; Chemical Operations:802.3 ; Chemical Agents and Basic Industrial Chemicals:803

ENGINEERING

Web of Science

1.Huazhong Univ Sci & Technol, State Key Lab Coal Combust, Wuhan 430074, Hubei, Peoples R China
2.SINOPEC Res Inst Petr Proc, Beijing 100083, Peoples R China
3.Tsinghua Univ, Inst Nucl & New Energy Technol, Beijing 100084, Peoples R China
4.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China

Zhou, Zijian,Cao, Tiantian,Liu, Xiaowei,et al. Vanadium silicate (EVS)-supported silver nanoparticles: A novel catalytic sorbent for elemental mercury removal from flue gas[J]. JOURNAL OF HAZARDOUS MATERIALS,2019,375:1-8.

Zhou, Zijian,Cao, Tiantian,Liu, Xiaowei,Xu, Shengming,Xu, Zhenghe,&Xu, Minghou.(2019).Vanadium silicate (EVS)-supported silver nanoparticles: A novel catalytic sorbent for elemental mercury removal from flue gas.JOURNAL OF HAZARDOUS MATERIALS,375,1-8.

Zhou, Zijian,et al."Vanadium silicate (EVS)-supported silver nanoparticles: A novel catalytic sorbent for elemental mercury removal from flue gas".JOURNAL OF HAZARDOUS MATERIALS 375(2019):1-8.