Catalytic hydrogenation of anthracene was studied over Ni supported on Hβ-zeolite catalyst under supercritical carbon dioxide (sc-CO2) solvent. Hydrogenation of anthracene in sc-CO2 yielded 100% conversion at 100 °C, which is attributed to the reduced mass transfer limitations, and increased solubility of H2 and substrate in the reaction medium. The total pressure of 7 MPa was found to be optim...

Research has been carried out on the preparation of active natural zeolite impregnated with nickel followed by activity testing through hydrocracking catalytic reaction n-Hexadecane. Active was obtained from PT Prima Zeolita Yogyakarta. The concentration in sample ion exchange method [Ni(NH3)6]2+ precursor solution a 0.06M. content catalyst determined Atomic Absorption Spectrophotometer (AAS). ...

Zeolite 13X and 5A supported Ni catalysts were synthesized for CO2 methanation using the evaporation impregnation method. The influence of different precursors (nitrate, citrate, acetate) as well calcination temperatures on catalyst properties performance investigated. XRD, SEM-EDX, TEM, STEM-EDX, N2 physisorption, H2-TPR, TPD-NH3 TG/DTA used detailed characterization catalysts. parent structur...

Mesoporous alumina catalysts that incorporate nickel (Ni-Alumina) with different Ni/Al molar ratios of 1:2, 1:5 and 1:10 were synthesized by a one-step sol–gel method using lauric acid as a template. The prepared Ni-Alumina catalysts showed a relatively high surface area with a narrow pore size distribution after calcination at 700 ◦C; these effects were independent of the Ni/Al molar ratio. Al...

We report the synthesis and characterization, reaction kinetics, deactivation mechanism of a series catalysts with metallic nickel (Ni) molybdenum carbide (Mo2C) particles supported on zeolite Y (Ni-Mo2C/FAU) in methane steam reforming (MSR) at 850 °C. Despite low Ni loading 2.4 wt%, MSR Ni-Mo2C/FAU exhibits high activity stability, yet Ni-FAU is significant. Further investigations elucidate th...

We describe a simple and highly efficient procedure for the single-step preparation of isatins from the commercially available anilines using H-β zeolite as a truly heterogeneous catalyst. H-β zeolite is readily separated from reaction mixture by simple filtration and reused several times without considerable loss of activity.

By using a faujasite zeolite as the sole Si and Al source with simple ammonium cyclic cations, it has been possible to synthesize the SSZ-39 zeolite with high yields, and to prepare a catalyst for potential industrial applications in the SCR of NOx.

The dual template synthesis of zeolite SSZ-13 by use of trimethyl-adamantanammonium hydroxide and a diquaternary-ammonium mesoporogen induces considerable mesoporosity without impeding zeolite microporosity. The strongly improved accessibility of Brønsted sites in mesoporous SSZ-13 increases its stability during application as an acid catalyst in the methanol-to-olefins reaction.

Structured catalysts formed from the growth of zeolites on substrates is an area of increasing interest due to the increased efficiency of the catalytic process, and the ability to provide superior heat transfer and thermal conductivity for both exothermic and endothermic processes. However, the generation of structured catalysts represents a significant challenge when balancing the relationshi...

Highly regioselective dialkylation of naphthalene using various alkylating agents can be achieved over zeolite catalysts. For example, the tert-butylation of naphthalene (1) using tert-butanol in cyclohexane over a dealuminated H-Mordenite (HM) zeolite has been optimised to give a 60% yield of 2.6-di-tert-butylnaphthalene (3) with a 2.6/2.7 ratio of over 50. This has been achieved by varying th...