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Catalyst Deactivation and Regeneration
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2-methylpentane a-olefins acidic activation energy active sites adsorbed adsorption alkyl alloy AlR3 alumina Amer bimetallic bond shift c.f. Figure carbon atoms Catal catalysts based catalytic activity catalytic centre catalytic systems Chem chemical chemisorption Chim clusters coke coke formation concentration copolymerization copolymers correlation crystalline crystallites cyclic mechanism cycloolefins cyclopentane deactivation dispersed double bond electronic equation ethylene ethylene polymerization Gault heterogeneous hydrocarbons hydrogen hydrogenolysis interaction ions isomerization isopentane isospecific polymerization isotactic kinetic kJ mol-1 ligand Makromol Mazzanti merization metal atoms metal particles molecular weight molecules monomer Natta neopentane obtained olefin organometallic compounds oxide Pasquon permission from ref platinum poisoning polymer polymer chains polymerization rate polypropylene precursor presence propylene propylene polymerization ratio reactant reaction reactor Reproduced with permission scheme species stereospecificity structure surface area syndiospecific syndiotactic temperature TiCl3 TiCl4 tion transition metal Yermakov Zakharov Zambelli Ziegler-Natta Ziegler-Natta catalysts