title: Amino Compounds as Inhibitors of De Novo Synthesis of Chlorobenzenes.
abstract: The inhibitory effects of four amino compounds on the formation of chlorobenzenes (CBzs)--dioxin precursors and indicators, and the inhibitory mechanisms were explored. The results show NH4H2PO4 can decrease the total yields of CBzs (1,2di-CBz, 1,3di-CBz, 1,4di-CBz, penta-CBz and hexa-CBz) by 98.1%±1.6% and 96.1%±0.7% under air and nitrogen flow. The inhibitory effects indicated by the total yields of CBzs follow the order NH4H2PO4 > NH4HF2 > (NH4)2SO4 > NH4Br under air flow and NH4H2PO4 ≈ (NH4)2SO4 ≈ NH4HF2 >NH4Br under nitrogen flow. The inhibition mechanism revealed by thermal analysis that CuCl2 was converted to CuPO3 by reacting with NH4H2PO4 below 200 °C, which can block the transfer of chlorine and formation of C-Cl bonds at 350 °C. The effects of the other three inhibitors were weaker because their reactions with CuCl2, which form other copper compounds, and the reaction of CuCl2 with carbon, which forms C-Cl bonds, were almost simultaneous and competitive. Oxygen influenced the yield of CBzs obviously, and the total yield of five CBzs sharply increased with oxygen. Because of their high efficiency, low environmental impact, low cost, and availability, amino compounds--especially NH4H2PO4--can be utilized as inhibitors of CBzs during incineration.
authors.affiliation: State Key Laboratory of Pollution Control and Resources Reuse, Tongji University, 1239 Siping Road, Shanghai 200092, P. R. China.|Institute of Waste Treatment and Reclamation, Tongji University, 1239 Siping Road, Shanghai 200092, P. R. China.
authors.forename: Si-Jia
authors.initials: SJ
authors.lastname: Wang
authors.affiliation: Institute of Waste Treatment and Reclamation, Tongji University, 1239 Siping Road, Shanghai 200092, P. R. China.|Centre for the Technology Research and Training on Household Waste in Small Towns &Rural Area, Ministry of Housing and Urban-Rural Development of P. R. China, 1239 Siping Road, Shanghai 200092, P. R. China.
authors.forename: Pin-Jing
authors.initials: PJ
authors.lastname: He
authors.affiliation: State Key Laboratory of Pollution Control and Resources Reuse, Tongji University, 1239 Siping Road, Shanghai 200092, P. R. China.|Institute of Waste Treatment and Reclamation, Tongji University, 1239 Siping Road, Shanghai 200092, P. R. China.
authors.forename: Wen-Tao
authors.initials: WT
authors.lastname: Lu
authors.affiliation: Institute of Waste Treatment and Reclamation, Tongji University, 1239 Siping Road, Shanghai 200092, P. R. China.|Centre for the Technology Research and Training on Household Waste in Small Towns &Rural Area, Ministry of Housing and Urban-Rural Development of P. R. China, 1239 Siping Road, Shanghai 200092, P. R. China.
authors.forename: Li-Ming
authors.initials: LM
authors.lastname: Shao
authors.affiliation: State Key Laboratory of Pollution Control and Resources Reuse, Tongji University, 1239 Siping Road, Shanghai 200092, P. R. China.
authors.forename: Hua
authors.initials: H
authors.lastname: Zhang