نتایج جستجو برای: zeolite HY

تعداد نتایج: 13426  

Journal: : 2021

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...

2010
Teerawit Prasomsri Roberto E. Galiasso Tailleur Walter E. Alvarez Tawan Sooknoi Daniel E. Resasco

Conversion of 1and 2-tetralone was investigated over acid HY zeolite under various reaction conditions in the vapor phase. Reactions were conducted in a fixed-bed reactor at 300, 400 and 500 C in hydrogen atmospheric pressure. It was found that 1and 2-tetralone are thermally unstable and thermal reaction has a contribution, particularly at high temperatures. The reactivity of 2-tetralone was si...

Journal: : 2022

The synthesis of NaY-zeolite was performed hydrothermally. preparation the bifunctional catalysts achieved by loading NH4Y-zeolite with a cheap Zr metal, as second tiny amounts Pt to compose Pt-Zr/Y-zeolite catalyst. Different characterization methods (i.e., XRD, SEM, EDX, BET, and AFM) were used investigate catalyst properties. catalytic performance studied performing hydroisomerization n-hept...

Journal: :International Journal of Advances in Applied Sciences 2022

<span>Banana stem midrib has potential as glucose source through catalytic hydrolysis assisted by ultrasonic (sono-hydrolysis). Besides, natural sand-based silica is raw material for zeolite synthesis. The purpose of the study was to do two things: i) characterize HY-zeolite made from and ii) determine whether or not effective sono-hydrolysis banana midrib. There a total four processes th...

2001
Christian Huber Karin Moller Steven B. Ogunwumi

Stabilization techniques for low-valent organometallic species in acidic forms of large-pore zeolite Y are reported. The intrazeolite surface chemistry and thermal stability of MesSnCo(CO)4 in HY zeolites (I&NaloA155Si1370384 and H16Na39A155Sil370384) were studied with X-ray absorption spectroscopy (Sn, Co edge EXAFS) and in-sifu FTIR/TPD-MS techniques. The acidic zeolite Y host offers a chemic...

Journal: :journal of pharmaceutical and health sciences 0

a simple, fast, efficient and environmentally friendly method for synthesis of benzimidazole and its 2-alkyl, aryl and heteroaryl substituted derivatives was developed using zeolite hy. two component cyclolcondensation of 1,2-phenylenediamine (o-phenylenediamine) and commercially available carboxylic acids catalyzed by zeolite hy without any solvent, under microwave irradiation led to formation...

2014
H. Figueiredo

This work presents the recovery of biosorption supports as an alternative source of benign production of heterogeneous catalysts for oxidation reactions in mild conditions. Cr-containing FAU zeolite, in sodium form (NaY) and in proton form (HY), was recovered from biosorption studies and reused as support for the preparation of heterogeneous catalysts by the flexible ligand method, using 1,3-di...

Journal: :Tikrit Journal of Engineering Science 2023

The naphtha catalytic reforming process is evaluated by designing new composite nano-catalysts. Three catalysts were prepared for this process. first catalyst was molybdenum carbide with platinum over HY zeolite (Mo2C.Pt/HY zeolite), the second modified cerium nitrate (Mo2C.Pt/CeY and last bimetallic titanium a content of 1% 0.11% (Pt.Ti/HY zeolite). All tested several tests, mainly X-Ray Diffr...

Journal: :Journal of Catalysis 2021

This work evaluates the effects of sulfide phase location on zeolite-containing catalysts in cyclohexene hydroconversion using infrared operando technique. Parallels between activity, product yield, and surface species changes with time stream under pyridine poisoning were assessed pure HY zeolite, sulfided NiMo/HY, NiMo/Al2O3, NiMo/Al2O3 + HY. Isomerization activity could be related to zeoliti...

A simple, fast, efficient and environmentally friendly method for synthesis of benzimidazole and its 2-alkyl, aryl and heteroaryl substituted derivatives was developed using zeolite HY. Two component cyclolcondensation of 1,2-phenylenediamine (o-phenylenediamine) and commercially available carboxylic acids catalyzed by zeolite HY without any solvent, under microwave irradiation led to formation...

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