Tin promoted palladium catalysts for nitrate removal from drinking water

Berndt, H.; Mönnich, I; Lücke, Bernhard; Menzel, M.

doi:10.1016/s0926-3373(00)00225-3

Cited by 89 publications

(56 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…A new technique that is actually under research is the catalytic reduction of nitrates to nitrogen, using hydrogen as reductant [2][3][4][5][6][7][8][9]. The catalysts used are based in a combination of a noble metal, such as Pd, Pt, Rh or Ir and a no noble metal, such as Cu, Sn, Ag or In [5][6][7][8][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

A study of different supports for the catalytic reduction of nitrates from natural water with a continuous reactor

2011

View full text Add to dashboard Cite

The aim of this work is to study the activity for the nitrate catalytic reduction in natural water, using a continuous stirred tank reactor, of Pd/Cu and Pd/Sn catalysts supported on different materials. The studied supports are: -Al 2 O 3 (commercial), active carbon, graphite, hydrotalcite and alumina synthesized in our laboratory with a high surface area. The activity and selectivity of the catalysts supported on these materials have been compared. The best results have been obtained with the Pd/Sn catalysts supported on alumina. These results show that the surface area of the support is not the only important characteristic for an active catalyst in this reaction, being also very significant its acid-base properties, its electrical conductivity and its interaction with the metallic active sites. The adequate combination of these characteristics is necessary to obtain an active catalyst. The influence of the Pd/Sn content on the activity of the alumina supported catalysts was studied, observing that the best activity was obtained when the Pd/Sn ratio was higher than 1. This result clearly indicates that it is necessary to have both Pd and Pd-Sn centers in order to obtain an active catalyst.

show abstract

Section: Introductionmentioning

confidence: 99%

A study of different supports for the catalytic reduction of nitrates from natural water with a continuous reactor

2011

View full text Add to dashboard Cite

show abstract

“…Berndt et al [26] and Mo¨nnich [27] studied Pd-Sn catalysts supported on alumina by FTIR and 119 SnMo¨ssbauer spectroscopy. Their catalysts contained both Pd-Sn and pure Pd ensembles, which coexisted on the catalysts.…”

Section: Introductionmentioning

confidence: 99%

Water Denitration over a Pd–Sn/Al2O3 Catalyst

et al. 2005

View full text Add to dashboard Cite

Bimetallic Pd-Sn catalysts were synthesized by incipient-wetness impregnation of the metals on alumina and employed for the reduction of nitrates from aqueous solutions. The catalysts were characterized by FTIR spectroscopy of adsorbed CO, X-ray diffraction (XRD), transmission electron microscopy (TEM), and H 2 chemisorption. The influence of the metal ratio was evaluated in reaction measurements. The bimetallic Pd-Sn catalysts exhibited high selectivity for nitrate removal forming less NO 2 ) and NH 4 + than the Pd-Cu catalysts.

show abstract

“…With a proper combination, an ammonia concentration as low as 0.5 mg/L was achieved, starting from 100 mg/L NO − 3 −N. A Pd/Al 2 O 3 catalyst modified via controlled surface reaction with hexane solutions of Sn(C 4 H 9 ) 4 increased catalytic activity [101]. Pd/SnO 2 catalysed the nitrate hydrogenation in an aqueous phase, and feeding carbon dioxide helped maintained pH and minimized ammonia formation [102].…”

Section: Catalytic Hydrogenationmentioning

confidence: 99%

A review of nitrate reduction using inorganic materials

Zhu

Getting

2012

Environmental Technology Reviews

View full text Add to dashboard Cite

In a biological denitrification system for water and wastewater treatment, an external carbon source (electron donor) is usually needed to generate dedicated microbial communities if intrinsic organic substances are insufficient. Alternative sources of electron donors, especially inorganic donors, are becoming more and more attractive in order to replace or reduce carbon use. In this article, inorganic electron donors, i.e. zero-valent iron, ferrous ion, sulphur and hydrogen are reviewed. While carbon dioxide (greenhouse gas) is produced when organic electron donors are used, inorganic electron donors have the potential advantages to reduce a plant's carbon footprint, and prevent carbon eluting out of the system, as occurs with heterotrophic processes. While sulphur and hydrogen are promising for nitrate removal in terms of reaction kinetics and economical feasibility, zero-valent iron and ferrous ion show potential to be utilized as a supplement to heterotrophic denitrification, where it is anticipated that synergistic effects would occur with autotrophic and heterotrophic denitrification, and thus external carbon consumption can be reduced.

show abstract

Tin promoted palladium catalysts for nitrate removal from drinking water

Cited by 89 publications

References 22 publications

A study of different supports for the catalytic reduction of nitrates from natural water with a continuous reactor

A study of different supports for the catalytic reduction of nitrates from natural water with a continuous reactor

Water Denitration over a Pd–Sn/Al2O3 Catalyst

A review of nitrate reduction using inorganic materials

Contact Info

Product

Resources

About