Activated carbon cloth-supported Pd-Cu catalyst: Application for continuous water denitrification

TY - JOUR

T1 - Activated carbon cloth-supported Pd-Cu catalyst

T2 - Application for continuous water denitrification

AU - Matatov-Meytal, Uri

AU - Sheintuch, Moshe

N1 - Funding Information: Work supported by Grand Water Research Institute. U. M.-M. thanks the Center for Adsorption in Science of the Ministry of Immigrant Absorption and the Committee for Planning and Budgeting of the Council for Higher Education for financial support. Authors are thankful to Dr. Yury Shindler for CO-chemisorption measurements and Dr. Irena Efremenko for fruitful discussions.

PY - 2005

Y1 - 2005

N2 - Pd-Cu catalysts supported on woven fibrous cloths have been tested for continuous nitrate hydrogenation in water. The results demonstrate that activated carbon cloth (ACC) is an adequate support for the Pd-Cu bimetallic catalysts giving better activity and selectivity than that of supports like glass fibers cloth (GFC) and GFCs coated with Al2O3 or SnO2, which were also studied. A series of 2% Pd-Cu/ACC catalysts were prepared by selective deposition of Cu on Pd/ACC and examined at steady state in a continuous three-phase radial flow reactor. The activity and selectivity of the bimetallic catalysts depend on the Cu:Pd ratio and the metal loading. The beneficial effect of copper on nitrate hydrogenation activity with a Pd-Cu/ACC catalyst is probably related to the formation of an active Pd-Cu ensembles working as active sites for nitrate-to-nitrite reduction. The maximal nitrate conversion was achieved with 0.6 wt.% Cu-2 wt.% Pd/ACC catalyst showing a 92% selectivity towards gaseous products.

AB - Pd-Cu catalysts supported on woven fibrous cloths have been tested for continuous nitrate hydrogenation in water. The results demonstrate that activated carbon cloth (ACC) is an adequate support for the Pd-Cu bimetallic catalysts giving better activity and selectivity than that of supports like glass fibers cloth (GFC) and GFCs coated with Al2O3 or SnO2, which were also studied. A series of 2% Pd-Cu/ACC catalysts were prepared by selective deposition of Cu on Pd/ACC and examined at steady state in a continuous three-phase radial flow reactor. The activity and selectivity of the bimetallic catalysts depend on the Cu:Pd ratio and the metal loading. The beneficial effect of copper on nitrate hydrogenation activity with a Pd-Cu/ACC catalyst is probably related to the formation of an active Pd-Cu ensembles working as active sites for nitrate-to-nitrite reduction. The maximal nitrate conversion was achieved with 0.6 wt.% Cu-2 wt.% Pd/ACC catalyst showing a 92% selectivity towards gaseous products.

KW - Activated carbon cloth

KW - Liquid-phase hydrogenation

KW - Nitrate

KW - Pd-Cu catalyst

UR - http://www.scopus.com/inward/record.url?scp=18844368487&partnerID=8YFLogxK

U2 - 10.1016/j.cattod.2005.02.015

DO - 10.1016/j.cattod.2005.02.015

M3 - 文章

AN - SCOPUS:18844368487

SN - 0920-5861

VL - 102-103

SP - 121

EP - 127

JO - Catalysis Today

JF - Catalysis Today

ER -