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CLC number: TQ534.9

On-line Access: 2012-08-30

Received: 2012-04-23

Revision Accepted: 2012-07-29

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Journal of Zhejiang University SCIENCE A 2012 Vol.13 No.9 P.700-708

http://doi.org/10.1631/jzus.A1200112


Impact of individual acid flue gas components on mercury capture by heat-treated activated carbon


Author(s):  Jian-ming Zheng, Jin-song Zhou, Zhong-yang Luo, Ke-fa Cen

Affiliation(s):  State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China; more

Corresponding email(s):   jeffe@jmu.edu.cn, zhoujs@zju.edu.cn

Key Words:  Flue gases, Mercury, Activated carbon (AC)


Jian-ming Zheng, Jin-song Zhou, Zhong-yang Luo, Ke-fa Cen. Impact of individual acid flue gas components on mercury capture by heat-treated activated carbon[J]. Journal of Zhejiang University Science A, 2012, 13(9): 700-708.

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author="Jian-ming Zheng, Jin-song Zhou, Zhong-yang Luo, Ke-fa Cen",
journal="Journal of Zhejiang University Science A",
volume="13",
number="9",
pages="700-708",
year="2012",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A1200112"
}

%0 Journal Article
%T Impact of individual acid flue gas components on mercury capture by heat-treated activated carbon
%A Jian-ming Zheng
%A Jin-song Zhou
%A Zhong-yang Luo
%A Ke-fa Cen
%J Journal of Zhejiang University SCIENCE A
%V 13
%N 9
%P 700-708
%@ 1673-565X
%D 2012
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A1200112

TY - JOUR
T1 - Impact of individual acid flue gas components on mercury capture by heat-treated activated carbon
A1 - Jian-ming Zheng
A1 - Jin-song Zhou
A1 - Zhong-yang Luo
A1 - Ke-fa Cen
J0 - Journal of Zhejiang University Science A
VL - 13
IS - 9
SP - 700
EP - 708
%@ 1673-565X
Y1 - 2012
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A1200112


Abstract: 
Elemental mercury capture on heat-treated activated carbon (TAC) was studied using a laboratory-scale fixed bed reactor. The capability of TAC to perform Hg0 capture under both N2 and baseline gas atmospheres was studied and the effects of common acid gas constituents were evaluated individually to avoid complications resulting from the coexistence of multiple components. The results suggest that surface functional groups (SFGs) on activated carbon (AC) are vital to Hg0 capture in the absence of acid gases. Meanwhile, the presence of acid gas components coupled with defective graphitic lattices on TAC plays an important role in effective Hg0 capture. The presence of HCl, NO2, and NO individually in basic gases markedly enhances Hg0 capture on TAC due to the heterogeneous oxidation of Hg0 on acidic sites created on the carbon surface and catalysis by the defective graphitic lattices on TAC. Similarly, the presence of SO2 improves Hg0 capture by about 20%. This improvement likely results from the deposition of sulfur groups on the AC surface and oxidation of the elemental mercury by SO2 due to catalysis on the carbon surface. Furthermore, O2 exhibits a synergistic effect on Hg0 oxidation and capture when acid gases are present in the flue gases.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

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