Elemental mercury removal from flue gas using modified tonstein: Performance of adsorbent injection at an entrained flow reactor system and 50-MW coal-fired power plant in China

Five biomass including cotton stalk (CS), sunflower stalk (SS), wheat stalk (WS), rice husk (RH) and maize stalk (MS) were pyrolyzed in an entrained flow reactor under reburning condition. The chlorine release fraction was determined based on the analysis of each biomass and the relevant bio-coke measured by digital ion meter. The effects of biomass species, reaction temperature (T), residence time (τ), stoichiometric ratio (SR2), and initial oxygen content in the simulated flue gas on chlorine release were analyzed. The obtained results indicated that the chlorine release fraction increases with the increasing of reaction temperature, and all biomass have a higher chlorine release fraction of 94.6%–100% at high reaction temperature. Stoichiometric ratio has little influence on chlorine release. The chlorine release fraction shows a significant increase from 80.3% to 97.1% with increasing initial oxygen content in the simulated flue gas from 0% to 4%.

Download Full-text

Kinetic transformation of mercury in coal combustion flue gas in a bench-scale entrained-flow reactor

Fuel Processing Technology ◽

10.1016/j.fuproc.2003.11.002 ◽

2004 ◽

Vol 85 (6-7) ◽

pp. 463-472 ◽

Cited By ~ 15

Author(s):

Ye Zhuang ◽

Christopher J Zygarlicke ◽

Kevin C Galbreath ◽

Jeffrey S Thompson ◽

Michael J Holmes ◽

...

Keyword(s):

Flue Gas ◽

Coal Combustion ◽

Flow Reactor ◽

Bench Scale ◽

Entrained Flow ◽

Entrained Flow Reactor ◽

Kinetic Transformation

Download Full-text

In-Flight Mercury Removal and Cobenefit of SO2 and NO Reduction by NH4Br Impregnated Activated Carbon Injection in an Entrained Flow Reactor

Energy & Fuels ◽

10.1021/acs.energyfuels.5b01903 ◽

2015 ◽

Vol 29 (12) ◽

pp. 8118-8125 ◽

Cited By ~ 13

Author(s):

Qiang Zhou ◽

Yu-feng Duan ◽

Chun Zhu ◽

Min She ◽

Jun Zhang ◽

...

Keyword(s):

Activated Carbon ◽

No Reduction ◽

Flow Reactor ◽

Mercury Removal ◽

Entrained Flow ◽

Entrained Flow Reactor ◽

Carbon Injection

Download Full-text

Low-Cost Organic Adsorbents for Elemental Mercury Removal from Lignite Flue Gas

Energies ◽

10.3390/en14082174 ◽

2021 ◽

Vol 14 (8) ◽

pp. 2174

Author(s):

Marta Marczak-Grzesik ◽

Stanisław Budzyń ◽

Barbara Tora ◽

Szymon Szufa ◽

Krzysztof Kogut ◽

...

Keyword(s):

Flue Gas ◽

Low Cost ◽

Elemental Mercury ◽

Mercury Content ◽

Flue Gases ◽

Mercury Removal ◽

Gas Purification ◽

Gas Temperature ◽

Corn Straw ◽

Flue Gas Purification

The research presented by the authors in this paper focused on understanding the behavior of mercury during coal combustion and flue gas purification operations. The goal was to determine the flue gas temperature on the mercury emissions limits for the combustion of lignites in the energy sector. The authors examined the process of sorption of mercury from flue gases using fine-grained organic materials. The main objectives of this study were to recommend a low-cost organic adsorbent such as coke dust (CD), corn straw char (CS-400), brominated corn straw char (CS-400-Br), rubber char (RC-600) or granulated rubber char (GRC-600) to efficiently substitute expensive dust-sized activated carbon. The study covered combustion of lignite from a Polish field. The experiment was conducted at temperatures reflecting conditions inside a flue gas purification installation. One of the tested sorbents—tire-derived rubber char that was obtained by pyrolysis—exhibited good potential for Hg0 into Hg2+ oxidation, resulting in enhanced mercury removal from the flue. The char characterization increased elevated bromine content (mercury oxidizing agent) in comparison to the other selected adsorbents. This paper presents the results of laboratory tests of mercury sorption from the flue gases at temperatures of 95, 125, 155 and 185 °C. The average mercury content in Polish lignite was 465 μg·kg−1. The concentration of mercury in flue gases emitted into the atmosphere was 17.8 µg·m−3. The study analyzed five low-cost sorbents with the average achieved efficiency of mercury removal from 18.3% to 96.1% for lignite combustion depending on the flue gas temperature.

Download Full-text