TY - JOUR
T1 - Cloth catalysts in water denitrification. I. Pd on glass fibers
AU - Matatov-Meytal, Yurii
AU - Barelko, Viktor
AU - Yuranov, Igor
AU - Sheintuch, Moshe
N1 - Funding Information:
This research was supported by The Water Research Institute and the Center for Absorption in Science, State of Israel. M. Sheintuch acknowledges the support of the Technion’s Fund for the promotion of research.
PY - 2000/7/17
Y1 - 2000/7/17
N2 - Fiber catalysts are easy to handle and free of mass-transfer resistance. This report is the first application of cloth catalysts to water denitrification. In this work, cloths woven from glass fibers (GF) of 7-10 μm in diameter, impregnated with Pd, were tested in a semi-batch reactor to evaluate their effectiveness in the catalytic liquid phase hydrogenation of nitrites and nitrates. The catalytic properties of Pd-GF cloths were evaluated as a function of Pd loading as well of chemical composition of the glass, specific surface area and weaving mode of the fibrous support. Investigated catalysts showed the same level of specific activity (per g Pd) as conventional powdered catalysts for liquid-phase hydrogenation of nitrites but their activity for nitrates was about one order of magnitude lower. The nitrite and nitrate removal activities were independent of the catalyst structure; the formation of ammonium ions was highly sensitive to reactant concentration. The stability of Pd-GF cloths is discussed. (C) 2000 Elsevier Science B.V.
AB - Fiber catalysts are easy to handle and free of mass-transfer resistance. This report is the first application of cloth catalysts to water denitrification. In this work, cloths woven from glass fibers (GF) of 7-10 μm in diameter, impregnated with Pd, were tested in a semi-batch reactor to evaluate their effectiveness in the catalytic liquid phase hydrogenation of nitrites and nitrates. The catalytic properties of Pd-GF cloths were evaluated as a function of Pd loading as well of chemical composition of the glass, specific surface area and weaving mode of the fibrous support. Investigated catalysts showed the same level of specific activity (per g Pd) as conventional powdered catalysts for liquid-phase hydrogenation of nitrites but their activity for nitrates was about one order of magnitude lower. The nitrite and nitrate removal activities were independent of the catalyst structure; the formation of ammonium ions was highly sensitive to reactant concentration. The stability of Pd-GF cloths is discussed. (C) 2000 Elsevier Science B.V.
KW - Fiberglass cloth support
KW - Nitrite removal
KW - Pd catalyst
KW - Water treatment
UR - http://www.scopus.com/inward/record.url?scp=0034679886&partnerID=8YFLogxK
U2 - 10.1016/S0926-3373(00)00141-7
DO - 10.1016/S0926-3373(00)00141-7
M3 - 文章
AN - SCOPUS:0034679886
SN - 0926-3373
VL - 27
SP - 127
EP - 135
JO - Applied Catalysis B: Environmental
JF - Applied Catalysis B: Environmental
IS - 2
ER -