Selective catalytic oxidation of NH3 to N2 for catalytic combustion of low heating value gas under lean/rich conditions

Kušar, Henrik; Ersson, Anders; Vosecký, Martin; Järås, Sven

doi:10.1016/j.apcatb.2004.02.020

Cited by 34 publications

(16 citation statements)

References 17 publications

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“…Presently, ammonia nitrogen removal is commonly achieved using biological processes [6], catalytic oxidation [7], membrane filtration [8] and ion-exchange adsorption [9]. However, those approaches have shortcomings: biodegradation is limited by the inability to remove low-concentration ammonium, membrane filtration is restricted by high cost, and catalytic oxidation is limited by its complicated technology.…”

Section: Introductionmentioning

confidence: 99%

A novel selective hybrid cation exchanger for low-concentration ammonia nitrogen removal from natural water and secondary wastewater

Feng

Sun

2015

Chemical Engineering Journal

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Section: Introductionmentioning

confidence: 99%

A novel selective hybrid cation exchanger for low-concentration ammonia nitrogen removal from natural water and secondary wastewater

Feng

Sun

2015

Chemical Engineering Journal

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“…In the last decades experimental studies for ammonia nitrogen removal from water increasingly improved. Ammonium compounds are characterised by an extreme solubility in the presence of water; for this reason, their removal requires complex treatments: biologic treatments (nitri cation and denitri cation, biodegradation), chemical treatments (oxidation, chlorination), electrochemical [12] and chemical-physical treatments (ionic exchange) [13][14][15][16]. The biological process is commonly considered a cost-effective and e cient treatment process for domestic wastewater [17].…”

Section: Introductionmentioning

confidence: 99%

On the Suitability of Phillipsite-chabazite Zeolitite Rock for Ammonia Uptake in Water. Some General Zeolite Features and a Case Study From the Pescara River (Italy)

Novembre

Gimeno

Calista

et al. 2022

Preprint

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Ionic exchange tests have been performed on superficial wastewaters to remove ammonia by the use of a volcanic zeolitized rock from Lazio Region (Central Italy). The zeolitite (natural zeolite) is characterized by chabazite, phillipsite and minor amounts of sanidine, leucite and analcime. After preliminary column experiments in laboratory focused to determine the saturation time of the zeolitite, a pilot plant was built up on a little water course near the area of San Giustino channel (Abruzzo Region, Central Italy). Wastewaters, characterised by starting ammonia value ranging between 5 and 120 mg/l, were filtered with a zeolitic bed. The first experimental results indicate a positive ammonia reduction of about 80-90% and, in all cases, NH4+ concentration values under the EU law limits. A main purpose of this paper is to evidence that most of studies published on uptake of ammonia by means of zeolitite lead with clinoptilolite-dominant zeolitite despite the large availability and best performance of phillipsite-chabazite zeolites. Last but not least, a large number of published studies are of difficult comparison because of poor characterization of the zeolitite used.

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“…Also, they suggested that in order to obtain a good selectivity into N 2 , it is necessary to have strong ion-O bonds with oxygen less labile and to have a low concentration of copper (5 wt%) [8]. Also other authors studied the selective catalytic oxidation of NH 3 into N 2 on copper oxide at low temperature [9][10][11][12][13][14]. Also, they suggested that in order to obtain a good selectivity into N 2 , it is necessary to have strong ion-O bonds with oxygen less labile [15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Selective catalytic oxidation of NH3 into N2 during biogas combustion over 2 wt%PdO/5 wt%CuO/γ-Al2O3

Abbas-Ghaleb

Chlala

2020

SN Appl. Sci.

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This work consists in the study of catalysts likely to present a good activity in the combustion of the landfill biogas for its valorization and a high performance in the selective catalytic oxidation of NH 3 to N 2. In this study, biogas catalytic combustion was investigated on 2 wt%PdO/5 wt%CuO/γ-Al 2 O 3 catalyst. This catalyst was prepared by wet impregnation than the catalytic reactivity was tested under atmospheric pressure using the following mixture: CH 4 (1 vol%), CO 2 (0.6 vol%), O 2 (4 vol%), H 2 O (0.1 vol%), 1000 ppm NH 3 and He with a total flow rate of 100 cm 3 min −1 and compared with 2 wt%PdO/Al 2 O 3 and 5 wt%CuO/Al 2 O 3. Furthermore, these different catalysts were characterized by inductively coupled plasma atomic emission spectroscopy, specific surface area analysis (BET), X-ray diffraction, diffuse reflectance spectroscopy and H 2 temperature-programmed reduction (H 2-TPR). This study showed that 2 wt%PdO/5 wt%CuO/γ-Al 2 O 3 catalyst exhibited a better performance towards the selective catalytic oxidation of NH 3 into N 2 compared to the other catalysts with a methane conversion corresponding to the best compromise in between.

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Selective catalytic oxidation of NH3 to N2 for catalytic combustion of low heating value gas under lean/rich conditions

Cited by 34 publications

References 17 publications

A novel selective hybrid cation exchanger for low-concentration ammonia nitrogen removal from natural water and secondary wastewater

A novel selective hybrid cation exchanger for low-concentration ammonia nitrogen removal from natural water and secondary wastewater

On the Suitability of Phillipsite-chabazite Zeolitite Rock for Ammonia Uptake in Water. Some General Zeolite Features and a Case Study From the Pescara River (Italy)

Selective catalytic oxidation of NH3 into N2 during biogas combustion over 2 wt%PdO/5 wt%CuO/γ-Al2O3

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