[Inhibition of chlorobenzene formation via various routes during waste incineration by ammonium sulfate and urea].
Chlorobenzene (CBz) is the precursor of polychlorinated dibenzo-p-dioxins/polychlorinated dibenzofurans (PCDD/Fs) generated in the processes of waste incineration, and it is regarded as a good indicator of PCDD/Fs for realizing PCDD/Fs online monitoring, moreover, pentachlorobenzene (PeCBz) and Hexachlorobenzene (HxCBz) belong to Persistent Organic Pollutants (POPs). However, the emission control of CBz in waste incineration does not attract enough attention, so this study focused on the inhibition of the 3 CBz formation routes in waste combustion by ammonium sulfate and urea, including CB formation from fly ash, CB formation from 1,2-dichlorobenzene (1,2-DiCBz) and the combustion of model medical waste. The results showed that both ammonium sulfate and urea reduced CBz yield during these three thermal processes. For instance, the inhibition rates of tetrachlorobenzene (TeCBz), PeCBz and HxCBz were 66.8%, 57.4% and 50.4%, respectively, when 1% urea was co-combusted with medical waste. By comparing the effect of ammonium sulfate and urea on CBz formation by three routes, urea was considered as a comparatively stable inhibitor for CBz.
Mi
M
Yan
Zhi-Fu
ZF
Qi
Xiao-Dong
XD
Li
Yan-Jun
YJ
Hu
Tong
T
Chen
D000645:Ammonium Sulfate / Q000737:chemistry*; D001572:Benzofurans; D002722:Chlorobenzenes / Q000737:chemistry*; D060729:Coal Ash; D004147:Dioxins; D006581:Hexachlorobenzene; D017745:Incineration; D011108:Polymers; D014508:Urea / Q000737:chemistry*
D001572:Benzofurans; D002722:Chlorobenzenes; D060729:Coal Ash; D004147:Dioxins; D011108:Polymers; C016068:polychlorodibenzofuran; D006581:Hexachlorobenzene; C004726:2-dichlorobenzene; D014508:Urea; C003060:pentachlorobenzene; C020887:dibenzo(1,4)dioxin; D000645:Ammonium Sulfate