نتایج جستجو برای: wetness impregnation
تعداد نتایج: 4803 فیلتر نتایج به سال:
Page ii ABSTRACT The ability to sense humidity and wetness is an important sensory attribute for many species across the animal kingdom, including humans. Although this sensory ability plays an important role in many human physiological and behavioural functions, as humans’ largest sensory organ i.e. the skin seems not to be provided with specific receptors for the sensation of wetness (i.e. hy...
Nickel catalysts were synthesized by incipient wetness impregnation and coprecipitation compared to a commercial Ni/kieselguhr catalyst for selective hydrogenation of 2-methylnaphthalene yield methyldecalin. The characterized using N2 physisorption, TGA, XRD, TEM. apparent activation energy depends on the support identity, with highest value (87 kJ/mol) obtained Ni/SiO2-Al2O3 lowest (30 Ni/kies...
A description and analysis is given of a wetness duration experiment, carried out in a potato field in the centre of the Netherlands in September 2005. The observations are used to design and evaluate a within-canopy dew model which provides the leaf wetness distribution within the canopy caused by dew processes and by precipitation. This withincanopy dew model consists of three layers (bottom,...
Impregnation is the most commonly used approach to prepare supported metal catalysts in industry. However, this method suffers from formation of large particles with uneven dispersion, poor thermal stability, and thus unsatisfied catalytic performance. Here, we demonstrate that self-pillared MFI zeolite (silicalite-1 ZSM-5) nanosheets larger surface area abundant Si-OH groups are ideal supports...
Passive NOx adsorption (PNA) is a novel technology to control emissions during cold start. However, the recent generation of PNA material, Pd/zeolite, suffers from major degradation under high CO concentrations. In this work, we developed form Pd/SSZ-13 by using freeze-drying process after incipient wetness impregnation. This showed better stability than sample synthesized common process. Sever...
The promoted K-La nanocatalysts supported on ZSM-5 zeolite were prepared via wetness impregnation method and tested for biodiesel production from soybean oil. The effects of different weight percentage of La, loading of K as a promoter and calcination conditions on structure and activity of catalyst were investigated. Results showed that the supported catalyst containing 7wt.% of La was pro...
The influence of leaf-wetness duration and temperature on infection of Amelanchier alnifolia (saskatoon) by Entomosporium mespili was quantified in controlled-environment studies. Plants were inoculated with a conidial suspension and then subjected to a period of leaf wetness (0, 6, 12, and 24 h), after which they were moved to a growth room set at a fixed temperature (10, 15, 20, 25, and 30°C)...
an extensive study of higher alcohol synthesis (has) from synthesis gas using cobalt (co) promoted alkalized mos2 catalysts supported on carbon nanotubes (cnts) is reported. up to 5wt.% of co is added to the 15wt.% mo-wt.%k/ cnts by incipient wetness impregnation method. most of the metal particles were homogeneously distributed inside the tubes and the rest on the outer surface of the cnts. t...
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