scholarly journals Enhancement of CeO2 modified commercial SCR catalyst for synergistic mercury removal from coal combustion flue gas

RSC Advances ◽  
2020 ◽  
Vol 10 (42) ◽  
pp. 25325-25338 ◽  
Author(s):  
Shibo Zhang ◽  
Qingzhu Zhang ◽  
Yongchun Zhao ◽  
Jianping Yang ◽  
Yang Xu ◽  
...  
Keyword(s):  
Flue Gas ◽  
Coal Combustion ◽  
Mercury Removal ◽  
Scr Catalyst

CeO2 modification improves the synergistic Hg0 removal performance of commercial SCR catalyst.

Deactivation Characteristics of SCR Catalyst at Different Stages in Coal-Fired Flue Gas

2018 ◽  
Author(s):  
Zhiwen Xu ◽  
Yuxin Li ◽  
Yungang Wang ◽  
Hao Wang ◽  
Qinxin Zhao
Keyword(s):  
Alkali Metal ◽  
Flue Gas ◽  
Coal Combustion ◽  
Catalyst Deactivation ◽  
Chemical Form ◽  
Scr Catalyst ◽  
Deactivation Of Catalyst ◽  
The Impact ◽  
Deactivation Mechanism

Through analyzing the impact of the factors of catalyst deactivation, different factors are classified according to timeliness characteristics. In this research, experiments were made under the condition of coal combustion flue gas on a coal-fired boiler to study the characteristics of the early deactivation of the SCR catalyst. Analysis shows that the main cause of early deactivation of catalyst is chemical poisoning (mainly alkali metal) and pores clogging on the surface of the catalyst. While the main cause of long-term deactivation is deeper chemical poisoning, pores clogging and the chemical form changes of elements on the surface of the catalyst. Through analyzing the influence of the factors of catalyst deactivation, separate factors are classified according to timeliness characteristics. This research provides a strong fundamental support to clear the deactivation mechanism of the SCR catalyst.

Performance of CuOx–neutral Al2O3 sorbents on mercury removal from simulated coal combustion flue gas

2015 ◽  
Vol 131 ◽  
pp. 403-408 ◽  
Author(s):  
Wen Du ◽  
Libao Yin ◽  
Yuqun Zhuo ◽  
Qisheng Xu ◽  
Liang Zhang ◽  
...  
Keyword(s):  
Flue Gas ◽  
Coal Combustion ◽  
Mercury Removal

Mercury removal from coal combustion flue gas by modified palygorskite adsorbents

2017 ◽  
Vol 147 ◽  
pp. 36-43 ◽  
Author(s):  
Huan Liu ◽  
Jianping Yang ◽  
Chong Tian ◽  
Yongchun Zhao ◽  
Junying Zhang
Keyword(s):  
Flue Gas ◽  
Coal Combustion ◽  
Mercury Removal ◽  
Modified Palygorskite

scholarly journals Mercury Removal From Coal Combustion Flue Gas by Pyrite-Modified Fly Ash Adsorbent

2021 ◽  
Author(s):  
Liqiang QI ◽  
Xu WANG ◽  
Wen WANG ◽  
Jingxin LI ◽  
Yan HUANG
Keyword(s):  
Fly Ash ◽  
Flue Gas ◽  
Coal Combustion ◽  
Gas Flow ◽  
Active Component ◽  
Mercury Removal ◽  
Gas Flow Rate ◽  
Mercury Adsorption ◽  
Mass Proportion ◽  
Modified Fly Ash

Abstract Pyrite and fly ash have certain advantages in adsorption and mercury oxidation. The pyrite-modified fly ash (PY+AC-FA) mercury adsorbent was prepared by mixing pyrite (PY) with acid-modified fly ash (AC-FA), which has better mercury removal effect than AC-FA. The experimental results of mercury adsorption show: when the reaction temperature is 50°C, the best doping proportion of modified fly ash is 20wt%, the mass proportion of pyrite to acid modified fly ash is 4:1, and the flue gas flow rate is 1.0L/min, the adsorbent has the best performance, and the adsorption rate of mercury reaches 91.92%. BET, XRD, SEM, TG-DSG and XRF were used to characterize these adsorbents. And the mechanism of mercury removal of pyrite-modified fly ash adsorbent is inferred: Hg0 is first adsorbed on the surface of the adsorbent, and then oxidized to HgS by the active component FeS2 in pyrite-modified fly ash.

Mercury Removal from Coal Combustion Flue Gas by Fly Ash

2012 ◽  
pp. 395-399
Author(s):  
Junyan Kuang ◽  
Wenqing Xu ◽  
Tingyu Zhu ◽  
Pengfei Jing
Keyword(s):  
Fly Ash ◽  
Flue Gas ◽  
Coal Combustion ◽  
Mercury Removal

Role of SO2for Elemental Mercury Removal from Coal Combustion Flue Gas by Activated Carbon

2008 ◽  
Vol 22 (4) ◽  
pp. 2284-2289 ◽  
Author(s):  
Md. Azhar Uddin ◽  
Toru Yamada ◽  
Ryota Ochiai ◽  
Eiji Sasaoka ◽  
Shengji Wu
Keyword(s):  
Activated Carbon ◽  
Flue Gas ◽  
Coal Combustion ◽  
Elemental Mercury ◽  
Mercury Removal

Removal of Mercury from Simulated Coal Combustion Flue Gas by Iron Sulfide-AC Adsorbent

2014 ◽  
Vol 1004-1005 ◽  
pp. 603-607 ◽  
Author(s):  
Sheng Ji Wu ◽  
Wei Yang ◽  
Jie Zhou ◽  
Zheng Miao Xie
Keyword(s):  
Flue Gas ◽  
Coal Combustion ◽  
Iron Sulfide ◽  
Removal Rate ◽  
Temperature Programmed Desorption ◽  
Flue Gases ◽  
Mercury Removal ◽  
Bet Surface Area ◽  
Higher Temperature ◽  
Temperature Programmed

Iron sulfide-AC adsorbents were prepared and their mercury removal capabilities were evaluated in the simulated coal combustion flue gases. The FeS2has much higher mercury removal rate than AC although it has much lower BET surface area than AC. FeS2also shows higher mercury removal rate than FeS, which is probably due to its higher free sulfur content on the FeS2. The mercury removal capability of AC modified FeS2decreases with increasing of AC content. Temperature programmed desorption/decomposition process (TPDD) shows FeS and FeS2have more desorption peak than AC and the main peaks of FeS and FeS2are at around 240°C. The desorption peaks of AC modified FeS2are shifted to the higher temperature compared with that of FeS2and more mercury compositions are desorbed by AC modified FeS2.

Fe-modified MnOx/TiO2 as the SCR catalyst for simultaneous removal of NO and mercury from coal combustion flue gas

2018 ◽  
Vol 348 ◽  
pp. 618-629 ◽  
Author(s):  
Shibo Zhang ◽  
Yongchun Zhao ◽  
Jianping Yang ◽  
Junying Zhang ◽  
Chuguang Zheng
Keyword(s):  
Flue Gas ◽  
Coal Combustion ◽  
Simultaneous Removal ◽  
Scr Catalyst
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