title: Decomposition of ammonia and hydrogen sulfide in simulated sludge drying waste gas by a novel non-thermal plasma.
abstract: To efficiently clean NH3 and H2S contained in municipal sewage sludge drying waste gas, experiments were conducted with a novel gliding arc discharge plasma reactor. Important parameters including applied voltage and gas velocity which can strongly influence the removal efficiency, energy cost and by-products yields were investigated. Maximum removal efficiencies were all obtained at the applied voltage of 11 kV and gas velocity of 4.72 m s−1. When NH3 and H2S were treated together, the total energy cost decreased by 38%. NO and SO2 were observed as main decomposition by-products, and the presence of NH3 may inhibit the production of SO2 whose yield decreased from 223.8 to 27.8 mg m−3. Tests performed on lab scale reactor showed that gliding arc discharge is efficient in decreasing the NH3 and H2S concentrations, and experiments will also be conducted on a larger scale reactor in the future.
authors.affiliation: State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China.
authors.forename: Shengyong
authors.initials: S
authors.lastname: Lu
authors.forename: Lu
authors.initials: L
authors.lastname: Chen
authors.forename: Qunxing
authors.initials: Q
authors.lastname: Huang
authors.forename: Liqin
authors.initials: L
authors.lastname: Yang
authors.forename: Changming
authors.initials: C
authors.lastname: Du
authors.forename: Xiaodong
authors.initials: X
authors.lastname: Li
authors.forename: Jianhua
authors.initials: J
authors.lastname: Yan
mesh_terms: D000393:Air Pollutants; D000641:Ammonia; D006862:Hydrogen Sulfide; D058626:Plasma Gases; D012722:Sewage; D014865:Waste Disposal, Fluid / Q000379:methods*
chemical_list: D000393:Air Pollutants; D058626:Plasma Gases; D012722:Sewage; D000641:Ammonia; D006862:Hydrogen Sulfide