Selective catalytic reduction of N2O and NO  in a single reactor in the nitric acid industry

Brink, R.W.C. van den; Booneveld, Saskia; Verhaak, M.J.F.M.; Bruijn, F.A. de

doi:10.1016/s0920-5861(02)00073-1

Cited by 37 publications

(19 citation statements)

References 5 publications

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“…The maximum conversion of NO is 60% on the CoO/H-ZSM-5 catalyst at 450°C and 24% on the CoO/ZrO 2 catalyst at 350°C (Table 1). A similar effect, namely, the lack of selective catalytic reduction of N 2 O, was found by van den Brink et al [14] on Co-ZSM-5 in the reaction mixture with N 2 O + NO + O 2 + H 2 O + C 3 H 8 . Table 1 using methane at temperatures 100°C less than in the case of the propane-butane mixture, i.e., methane is considerably more efficient as a reducing agent, perhaps as a consequence of the formation of an active nitromethane intermediate [15].…”

supporting

confidence: 79%

Effect of the composition and method of preparation of iron-containing and cobalt-containing catalysts on the combined reduction of NO and N2O by hydrocarbons

Boichuk

Орлик

2009

Theor Exp Chem

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The emission of nitrogen oxides NO x into the atmosphere is now 30 million tons annually. Most of these emissions are man-made. The content of N 2 O in the atmosphere is now 0.6 mg/m 3 , which is one or two orders of magnitude greater than the concentration of NO and NO 2 . The annual increment is on the order of 0.2-0.3%. Thus, elucidation of the conditions of the combined catalytic reduction of NO and N 2 O to molecular nitrogen, including selective reduction in the presence of oxygen is an important precursor for protection of the atmosphere [1]. We have already determined the conditions for increasing the conversion of N 2 O in the presence of NO and SO 2 on iron zeolite catalysts [2] and shown that higher NO conversions are achieved on cobalt zeolite (H-ZMS-5) catalysts, while higher N 2 O conversions are achieved on iron zeolite catalysts in the combined reduction of NO and N 2 O by C 3 -C 4 alkanes [3].In the present work, we present the results of a study of the combined reduction of NO and N 2 O by a propane-butane mixture and methane on iron and cobalt catalysts derived from H-ZSM-5 zeolite, zirconium dioxide, and a binary support (H-ZSM-5 + ZrO 2 ) as well as binary (Fe + Co) compositions.The hydrogen form of zeolite ZSM-5 (SiO 2 /Al 2 O 3 = 37) was obtained by ion exchange from an aqueous solution of NH 4 Cl. Iron and cobalt were introduced into the zeolite system by impregnation from solutions of Fe(NO 3 ) 2 ·6H 2 O and Co(NO 3 ) 2 with subsequent drying and roasting at 350°C for 4 h. The preparation of the samples on ZrO 2 and the binary zeolite + zirconium dioxide support was described in our previous work [4]. The catalysts contained 10 mass % Fe x O y and 5 or 10 mass % Co x O y (relative to the metal).The catalytic activity of the samples was characterized by the conversion of N 2 O and NO into nitrogen and was determined in a flow system with a diaphragmless quartz reactor at atmospheric pressure at 250-550°C. The following reaction 386 0040-5760/09/4506-0386

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supporting

confidence: 79%

Effect of the composition and method of preparation of iron-containing and cobalt-containing catalysts on the combined reduction of NO and N2O by hydrocarbons

Boichuk

Орлик

2009

Theor Exp Chem

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“…Industrial N 2 O emissions can be largely abated: 98% for adipic acid (Reimer et al, 1999;WBCSD/WRI, 2005) and 80-90% (WBCSD/WRI, 2005) and even up to 90-95% (Van den Brink et al, 2002) for nitric acid. The additional costs of these options are quite low; 1 US$/tCeq for adipic acid and 1-5 US$/tCeq for nitric acid (COHERENCE, 1999;De Beer et al, 2001).…”

Section: Nitrous Oxide Emission Reductions From Industrial Sourcesmentioning

confidence: 99%

Long-term reduction potential of non-CO2 greenhouse gases

Lucas

Vuuren

Olivier

et al. 2007

Environmental Science & Policy

141

134

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“…It would be favorable to reduce both the pollutants in one catalytic bed, using the same reducing agent as natural gas. Thus far, few papers were addressed to simultaneous selective catalytic reduction with hydrocarbons in a double catalytic bed [4][5][6][7], or in a single catalytic bed [8,9]. When a single catalyst was adopted for the simultaneous abatement, it was suggested that the nitrogen oxides partially competed for the same active sites [9].…”

Section: Introductionmentioning

confidence: 99%

The simultaneous selective catalytic reduction of N 2 O and NO X with CH 4 on Co- and Ni-exchanged mordenite

Campa

Pietrogiacomi

Occhiuzzi

2015

Applied Catalysis B: Environmental

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Selective catalytic reduction of N2O and NO in a single reactor in the nitric acid industry

Cited by 37 publications

References 5 publications

Effect of the composition and method of preparation of iron-containing and cobalt-containing catalysts on the combined reduction of NO and N2O by hydrocarbons

Effect of the composition and method of preparation of iron-containing and cobalt-containing catalysts on the combined reduction of NO and N2O by hydrocarbons

Long-term reduction potential of non-CO2 greenhouse gases

The simultaneous selective catalytic reduction of N 2 O and NO X with CH 4 on Co- and Ni-exchanged mordenite

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