نتایج جستجو برای: bed medium zeolite
تعداد نتایج: 293206 فیلتر نتایج به سال:
Background and aims: With the increasing air pollution to volatile organic compounds, in critical demand of a new environmentally, friendly technologies to remove these contaminants from the air stream is of interest to everyone. Photocatalytic processes, including processes, are considered, radiation may be in the future as a new and promising technology used for the removal ...
Two types of adsorbents were used to treat oily wastewater, activated carbon and zeolite. The removal efficiencies of these materials were compared to each other. The results showed that activated carbon performed some better properties in removal of oil. The experimental methods which were employed in this investigation included batch and column studies. The former was used to evaluate the rat...
Modifying of HY/Zeolite is by loading nickel for applying catalyst in thermal catalytic cracking furfural extract-40 from the lubricating base oil unit. The study involved characterizing HY-zeolite and promoted with X-ray diffraction analysis, Scanning electron microscopy (SEM), BET (Brunauer, Emmett, Teller), infrared ray analyses FTIR. tubular reactor a fixed bed two type catalysts; HY/zeolit...
Dye-exchanged Y zeolite is shown to be an effective medium to control the stereoselectivity in the photooxygenation of chiral oxazolidinone-functionalized Z/E-1 enecarbamates. An enantioselectivity (ee) as high as 80% was observed in the methyldesoxybenzoin (MDB) product, obtained in the methylene-blue-exchanged NaY zeolite at room temperature. The efficacy of the asymmetric induction in the MD...
The adsorption of basic dyes from aqueous solutions onto granular activated carbon and natural zeolite was studied using a fixed bed column. The design procedures for fixed bed adsorption columns were investigated for two basic dyes Maxilon Goldgelb GL EC 400 % (MG-400) and Maxilon Schwarz FBL-01 300 % (MS-300). A computer program based on the solid diffusion control model has been developed. T...
Effect of acidity and physical properties of nanozeolite catalyst on hydrocracking of vacuum gas oil
In this study, beta nanozeolite, ultra-stable Y zeolite (USY) and amorphous silica-alumina (ASA) were synthesized. These compounds were used as the support of hydrocracking catalyst. Ni-Mo/beta zeolite-ASA and Ni-Mo/USY zeolite-ASA catalysts were prepared by the impregnation method. The samples were characterized with X-Ray diffraction (XRD), field emission-scanning electron microscopy (FE-SEM)...
Due to the econemic and envaironmental limitiation in the use of peat moss as a growth medium of ornamental plants, researchers seek an apporiate alternative in flower and plants industry. Zeolite because of the high capacity of water holding and cations enchange, has an ability in the replacement of peat moss. At this research, the posibility subtitution of peat moss by zeolite as a growth me...
In order to investigate the effect of some substrates on uptake and concentration of nutrients in cherry tomato (Lycopersicon esculentum Mill. cv. Cerasiforne), this non-recycling soilless culture experiment was carried out as a completely randomized blocks design with 9 treatments and four replicates, with two plants in each pot. Treatments included perlite-vermiculite 50:50 %v, perlit-zeolite...
Dut to econemic and envaironmental limitiations of peat moss as a growth medium for ornamental plants, researchers seek an apporiate alternative in flower and plants industry. Zeolite, due to its high potential in water holding capcity and cation enchange capacity, has the ability to replace peat moss. To investigate the posibility of subtituting peat moss by zeolite as a proper medium for grow...
One of the main factors of an aggregate hydroponic system is to use a suitable plant media with local origin. Thus the objective of this research was to study the possibility of replacement of cocopeat as an imported material with local materials and the effects of such media on the growth and flowering characteristics of Rosa hybrida cv. Maroussia. A randomized complete blocks design experimen...
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