One of the important purposes of macromolecular processing is to lower its molecular weight in cases of heavy oil processing or of feedstock recycling of plastic wastes. Molecular-weight distributions (MWDs) of macromolecular feedstocks and the reaction products at the early stage of conversion continuously span wide ranges of molecular weights. Continuous-distribution analysis is a convenient method to evaluate macromolecular conversion based on time-dependent changes of MWDs of reaction mixtures, which are readily monitored by HPLC-GPC. Kinetic models of macromolecular conversion are derived from simplified reaction schemes to interpret experimental results giving kinetic parameters, rate of conversion and activation energy. The kinetic modeling is useful to the evaluation of reaction conditions of processing regarding rate of conversion. In this presentation, kinetic models are proposed to interpret asphaltene hydrocracking and polymer degradation of polyolefin and phenolic (resole) resin. Details of experimental results will be discussed in the presentation.
|Number of pages||5|
|Journal||ACS Division of Fuel Chemistry, Preprints|
|Publication status||Published - 1998|
- Continuous-distribution kinetics
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