Impacting Factors of Elemental Mercury Re-emission across a Lab-scale Simulated Scrubber

›› 2010, Vol. 18 ›› Issue (3): 523-528.

• PRODUCT ENGINEERING AND CHEMICAL TECHNOLOGY • Previous Articles Next Articles

Impacting Factors of Elemental Mercury Re-emission across a Lab-scale Simulated Scrubber

WU Chengli^1,2, CAO Yan², DONG Zhongbing¹, PAN Weiping²

1. School of Chemical Engineering, Anhui University of Science and Technology, Huainan 232001, China;
2. Institute for Combustion Science and Environmental Technology, Western Kentucky University, 42101, USA

Received:2009-09-17 Revised:2010-01-20 Online:2010-06-28 Published:2010-06-28
Supported by:
Supported by the US Agency for International Development(USAID)cooperation agreement(486-A-00-06-000140-00)

Impacting Factors of Elemental Mercury Re-emission across a Lab-scale Simulated Scrubber

武成利^1,2, 曹晏², 董众兵¹, 潘伟平²

1. School of Chemical Engineering, Anhui University of Science and Technology, Huainan 232001, China;
2. Institute for Combustion Science and Environmental Technology, Western Kentucky University, 42101, USA

通讯作者: WU Chengli,E-mail:chlwu2@163.com
基金资助:
Supported by the US Agency for International Development(USAID)cooperation agreement(486-A-00-06-000140-00)

Abstract

Abstract: Elemental mercury(Hg⁰)re-emissions from slurries and solutions were evaluated in a lab-scale simulated scrubber.Oxidized mercury(Hg²⁺)standard solution was injected into the simulated scrubber at a desired rate to simulate absorbing and dissolving of Hg²⁺ in the flue gas across wet flue gas desulfurization(WFGD)systems. PS analytical mercury analyzer was used to continuously determine Hg0re-emission concentrations in the carrier gas from the scrubber.Sulfite ion in the slurry of CaSO₃ was validated to reduce Hg²⁺ to Hg⁰,while no Hg⁰ re-emission occurred from slurries of CaSO₄ and CaO.Transitional metal ions with low chemical valence such as Fe²⁺,Pb²⁺,Ni²⁺,AsO₂^-+-1.Reduction reaction of Hg²⁺ to Hg⁰ was observed from these solutions.Reduction capabilities for the different transitional metal ions in the solutions were:Pb²⁺>Cu⁺>Fe²⁺>AsO₂^->Ni²⁺.

Key words: simulated scrubber, elemental mercury re-emission, impacting factors, sulfite, transitional metal ions

摘要： Elemental mercury(Hg⁰)re-emissions from slurries and solutions were evaluated in a lab-scale simulated scrubber.Oxidized mercury(Hg²⁺)standard solution was injected into the simulated scrubber at a desired rate to simulate absorbing and dissolving of Hg²⁺ in the flue gas across wet flue gas desulfurization(WFGD)systems. PS analytical mercury analyzer was used to continuously determine Hg0re-emission concentrations in the carrier gas from the scrubber.Sulfite ion in the slurry of CaSO₃ was validated to reduce Hg²⁺ to Hg⁰,while no Hg⁰ re-emission occurred from slurries of CaSO₄ and CaO.Transitional metal ions with low chemical valence such as Fe²⁺,Pb²⁺,Ni²⁺,AsO₂^-+-1.Reduction reaction of Hg²⁺ to Hg⁰ was observed from these solutions.Reduction capabilities for the different transitional metal ions in the solutions were:Pb²⁺>Cu⁺>Fe²⁺>AsO₂^->Ni²⁺.

关键词: simulated scrubber, elemental mercury re-emission, impacting factors, sulfite, transitional metal ions

WU Chengli, CAO Yan, DONG Zhongbing, PAN Weiping. Impacting Factors of Elemental Mercury Re-emission across a Lab-scale Simulated Scrubber[J]. , 2010, 18(3): 523-528.

武成利, 曹晏, 董众兵, 潘伟平. Impacting Factors of Elemental Mercury Re-emission across a Lab-scale Simulated Scrubber[J]. , 2010, 18(3): 523-528.

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Impacting Factors of Elemental Mercury Re-emission across a Lab-scale Simulated Scrubber

Impacting Factors of Elemental Mercury Re-emission across a Lab-scale Simulated Scrubber

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