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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/12333

Title: Catalytic cracking of gas-oils in electromagnetic fields: I-dielectric properties of zeolitic catalysts
Authors: Al-Mayman, S.I
Al-Zahrani, S.M.
Keywords: Capacitance; Catalytic cracking; Conductance; Dielectric; Gas oil and dielectric reactor; Loss tangent; Radio frequency (RF); Zeolite catalysts
Issue Date: 2002
Publisher: Springerlink
Citation: Catalysis Letters: Volume 78, Issue 1-4, Pages 331-337
Abstract: Three different zeolitic catalytic systems (13X, 5A and Ammonium Y) were tested for their dielectric properties, surface area and pore-size distribution. The 13X catalyst conductance is higher than other catalysts. The activation energies for 13X, 5A and Ammonium Y are 100, 80, and 50 kJ/mole respectively. The capacitances of 13X catalyst increase with increasing temperature causing a complex behaviour at higher temperatures and frequencies while the capacitances of 5A catalyst are usually less than 10 pF and those of Ammonium Y catalyst are erratic at low temperature. The 13X catalyst is the most suitable catalyst for its dielectric properties and proves to have a good potential to be heated by a RF dielectric reactor. The BET surface area in m2/g are 524 ± 2, 353 ± 1 and 684 ± 3 while the average pore diameters (in Å) by the BET technique are 33, 22, 26 and the micropore volumes in cm3/g are 0.187, 0.125 and 0.220 for 13X, 5A and Ammonium Y respectively.
URI: http://hdl.handle.net/123456789/12333
ISSN: 1011372X
Appears in Collections:College of Engineering

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