ChemInform Abstract: REMOVE NITROGEN OXIDES (NOX) FROM NITRIC ACID TAIL GAS

Yamaguchi, Makoto; Matsushita, Kiichiro; Takami, Kei

doi:10.1002/chin.197649397

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“…The NO/NO 2 ratio of the oxidizer can also be assumed to have an effect on the NH 3 conversion. In the literature the reactions of NH 3 with NO and NO 2 on the catalytic surface are commonly described with global reactions 2−5: − These reactions represent formal stoichiometric relationships, in which each includes probably a number of fundamental reactions steps on the catalyst surface.…”

Section: Resultsmentioning

confidence: 99%

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Selective Catalytic Oxidation of NH₃ in Gasification Gas. 3. Experiments at Elevated Pressure

1998

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In this study the ability of aluminum oxide to catalyze the selective oxidation of NH3 in hot pressurized (20 bar) synthetic gasification gas was examined. When the mixture of NO and O2 was used as oxidizer, it was found that part of the NO may be converted to NO2 in the gas feeding system. It was found that the ratio of NO/NO2 in the oxidizer mixture can be controlled by controlling the residence time and the temperature of the gas feeding system. Increasing the pressure increased the rate of NO2 formation. When the oxidizer consisted of NO2 and O2, large NH3 conversion was attained below 500 °C. With NO and O2 addition into the hot gasification gas the highest NH3 conversion took place at 550 °C. The addition of O2 alone to the aluminum oxide bed at high pressure reduced also the NH3 content of the gas. It was shown that aluminum oxide catalyzes the reaction between NH3 and O2.

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Section: Resultsmentioning

confidence: 99%

“…Catalytic oxidation of NH 3 with O 2 is generally assumed to take place according to the following steps: ,, Because no oxides of nitrogen was found in our experiments, it may be assumed that N 2 and H 2 O were the reaction products according to the global reaction 6, which describes the overall oxidation of NH 3 on aluminum oxide.…”

Section: Resultsmentioning

confidence: 99%

Selective Catalytic Oxidation of NH₃ in Gasification Gas. 3. Experiments at Elevated Pressure

1998

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ChemInform Abstract: REMOVE NITROGEN OXIDES (NOX) FROM NITRIC ACID TAIL GAS

Cited by 1 publication

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Selective Catalytic Oxidation of NH₃ in Gasification Gas. 3. Experiments at Elevated Pressure

Selective Catalytic Oxidation of NH₃ in Gasification Gas. 3. Experiments at Elevated Pressure

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ChemInform Abstract: REMOVE NITROGEN OXIDES (NOX) FROM NITRIC ACID TAIL GAS

Cited by 1 publication

References 0 publications

Selective Catalytic Oxidation of NH3 in Gasification Gas. 3. Experiments at Elevated Pressure

Selective Catalytic Oxidation of NH3 in Gasification Gas. 3. Experiments at Elevated Pressure

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Selective Catalytic Oxidation of NH₃ in Gasification Gas. 3. Experiments at Elevated Pressure

Selective Catalytic Oxidation of NH₃ in Gasification Gas. 3. Experiments at Elevated Pressure