Combining 13C‐NMR Triad Sequence Data with Joint Molecular Weight and Composition Data to Estimate Parameters in a Gas‐Phase Polyethylene Reactor Model
Abstract:A three-site metallocene catalyst is used in a gas-phase semi-batch reactor to produce ethylene/hexene copolymers. At the end of each batch, polyethylene (PE) is collected and analyzed to determine the carbon-13 nuclear magnetic resonance ( 13 C-NMR) triad sequence distribution. Joint molecular weight (MW) and composition distribution data are obtained using gel permeation chromatography with an infrared detector (GPC-IR). Data from ten experimental runs are used for kinetic parameter estimation. Using a mean-… Show more
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