Pilot-scale test for electron beam purification of flue gas from a municipal waste incinerator with slaked-lime

Hirota, Kouichi; Tokunaga, Okihiro; Miyata, Teijiro; Sato, Shôichi; Osada, Yo; Sudo, Masahiro; Doi, Takeshi; Shibuya, Eiichi; Baba, Shigekazu; Hatomi, Toshinori; Komiya, Mikihisa; Miyajima, Kiyonori

doi:10.1016/0969-806x(95)00328-u

Cited by 14 publications

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“…The electron beam irradiation process for flue gas purification has been proposed as an efficient method (Tokunaga et al, 1993). Sufficient removal performance for NO x and SO 2 in the process was demonstrated for flue gases from the coal-fired power generator (Namba et al, 1995), the municipal waste incinerator (Osada et al, 1995;Hirota et al, 1995), and the sintering machine (Kawamura et al, 1980). The principal of the removal reactions of NO x and SO 2 in the process is quite simple: active species, such as hydroxyl radicals produced by electron beam irradiation of humid flue gas, oxidize sulfur dioxides and nitrogen oxides in the flue gas to yield sulfuric and nitric acids, respectively.…”

Section: Introductionmentioning

confidence: 99%

Reactions of Sulfur Dioxide with Ammonia: Dependence on Oxygen and Nitric Oxide

Hirota¹,

Mäkelä²,

Tokunaga³

1996

Ind. Eng. Chem. Res.

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The influence of oxygen and nitric oxide on the reactions of sulfur dioxide with ammonia were studied in a simulated flue gas in the range of 0−20% oxygen and 0−300 ppm nitric oxide at temperatures in the range of 40−60 °C. A Fourier transform infrared spectrometer (FT-IR) analyzed the reaction products deposited on the reactor surface and revealed that ammonium sulfate was the main product of the reactions, with sulfamic acid and ammonium sulfamate as the minor products. The results showed that oxygen and nitric oxide enhanced the oxidation reactions of sulfur dioxide to form ammonium sulfate. The yield of the minor products markedly increased in the presence of nitrogen dioxide. The size and number concentration of product aerosols increased at lower temperature. The fraction of sulfur dioxide which formed aerosols increased with sulfur dioxide removal.

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