Kinetic modeling of catalytic cracking of C4 alkanes over La/HZSM-5 catalysts in light olefin production

作者: Nazi Rahimi , Ramin Karimzadeh

DOI: 10.1016/J.JAAP.2015.08.004

关键词: Elementary reactionPlug flow reactor modelButaneAlkaneInorganic chemistryCrackingFluid catalytic crackingCatalysisPhysical chemistryChemistryReaction rate

摘要: Abstract Kinetic modeling of catalytic cracking (CC) C4 alkanes (mixture i-butane and n-butane), over Lanthanum modified HZSM-5 catalyst has been studied at 582–630 °C in a plug flow reactor. The elementary reaction steps, i.e., protolytic (PC) C H bonds alkane molecules, hydrogen transfer between butane light olefins, olefin cracking, β-scission, adsorption desorption were taken into account. combination theory routes LHHW employed the complicated CC network to drive explicit overall rate reactantand product molecules. Then, parameter estimation model discrimination performed based on minimization mean residual sum squares experimental theoretical rates. intrinsic kinetic parameters estimated by non-linear least-square regression using MATLAB optimization toolbox.

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