The effects of calcination temperature on Pd/?-alumina catalysts were studied using a variety techniques to measure particle sizes, surface species, and activity in methane combustion. Pd/Al2O3 synthesized new impregnation-vortexing method. Three containing 3.3 wt.% calcined at 150 °C, 250 500 °C. light-off for combustion was 250-255 °C all 100% achieved 275 20 min with the 3Pd/Al2O3 catalyst u...

Four aluminas were used as supports for impregnation with a zirconium oxide with the aim to achieve a coating, without phase separation, between support and modifier. The supports were impregnated with different concentrations of zirconium aqueous resin, obtained through the polymeric precursor method. After impregnation the samples were calcined and then characterized by XRD, which led to iden...

Zr-PILC synthesis Two grams of a montmorillonite rich clay (for instance Bentonite CAS-No-1302-78-9) in 200 mL of water are stirred for a minimum of 2 hours, but preferably overnight. 50 mL of an aqueous 0.1 mol/L Zirconium(IV) oxychloride octahydrate (ZrOCl2·8H2O; CAS-No-13520-92-8) solution are then dropwise added to the clay dispersion (an isobaric dropping funnel can be used) under strong s...

Abstract ZSM-5 and analcime were successfully synthesized from coal fly ash using hydrothermal method in alkaline solution. The used was taken the Paiton PLTU, one of largest steam power plants Indonesia. purified sulphuric acid for 30 minutes it found that has 17.7 wt.% Si content 2.79 Al content. zeolite synthesis carried out a reactor at 160 o C 3 bar 48 hours both with without alumina addit...

The aim of the present study is to design and develop an alternative composition for making porcelainised stoneware, which has better properties than the conventional porcelainised stonewares. Contrary to the conventional porcelainised stonewares, this new body is designed to develop basically anorthite (CaO·Al2O3·2SiO2) crystals in the microstructure and to have a high crystalline to glassy ph...

Solvent-free technique was employed in this work in order to assess the influence of the calcination temperature on the activity of Al-promoted sulfated zirconia. The catalyst was analyzed by XRD and IR-spectrum method, and catalytic activity was examined by esterification reaction of oleic acid. XRD analysis revealed that a decline in the percentage of tetragonal phases of zirconia was observe...

The powders of Ba(Ce1-xZrx)0.90Y0.1O3-δ (BCZY) with 0.2 ≤ x ≤ 0.6 have been prepared by a modified sol-gel method. Triethylenetetramine (TETA) was employed as chelating agent. Phase formation of calcined powders at 1100C and sintered pellets at 1400C of BCZY were examined by an X-ray diffractrometer (XRD). XRD results showed the calcined powder and sintered pellet formed a single perovskite pha...

Catalytic wet oxidation has proved to be effective at eliminating hazardous organic compounds, such as phenol, from waste waters. However, the lack of active long-life oxidation catalysts which can perform in aqueous phase is its main drawback. This study explores the ability of bimetallic supported catalysts to oxidize aqueous phenol solutions using air as oxidant. Combinations of 2% of CoO, F...