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Experimental Study of Mercury Adsorption Characteristics of Biomass-pyrolysis Chars in the Simulated Flue Gas(PDF)

南京师范大学学报(工程技术版)[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2012年02期
Page:
36-42
Research Field:
Publishing date:

Info

Title:
Experimental Study of Mercury Adsorption Characteristics of Biomass-pyrolysis Chars in the Simulated Flue Gas
Author(s):
Shu TongWang QinchaoLu Ping
School of Energy and Mechanical Engineering,Nanjing Normal University,Nanjing 210042,China
Keywords:
biomasspyrolysisbiomass-pyrolysis charmercuryadsorption characteristics
PACS:
X701
DOI:
-
Abstract:
Different kinds of biomass-pyrolysis chars were prepared from four kinds of biomass named mulberry twig ( MT) ,nut shell ( NS) ,wheat straw ( WS) ,and rice husk ( RH) in a fixed-bed pyrolysis reactor. The specific surface areas and pore structure parameters were measured by a surface area analyzer. The mercury adsorption characteristics of the biomass-pyrolysis chars were carried out in a fixed-bed adsorption reactor. The effects of biomass type,pyrolysis temperature,adsorption temperature and initial mercury concentration on mercury adsorption characteristics were investigated. The results indicated that: ( 1) At the same conditions of pyrolysis and adsorption reaction,the adsorption characteristics of NS char were the best,MT char and WS chars were in middle,and RS char was the worst. ( 2) At the pyrolysis temperatures of 400℃ ~ 600℃,biomass chars pyrolyzed at 600℃ showed the best adsorption characteristics,and biomass chars pyrolyzed at 400℃ performed the worst adsorption characteristics. ( 3) The unit mercury adsorption capacity of biomass-pyrolysis chars decreased with increasing the adsorption temperature significantly at the adsorption temperature of 60℃ ~ 120℃. ( 4) The unit adsorption capacity of biomass-pyrolysis chars decreased slightly with increasing initial mercury concentration at the initial mercury concentration of 13. 5 μg /m3 ~ 38. 1 μg /m3

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Last Update: 2013-03-11