The research of palmitoyl hyperbranched polyglycerol synergized catalytic cracking reaction of hydrocarbons

Abstract

The polymer material palmitoyl hyperbranched polyglycerol (PHPG) was synthesized and investigated as carbenium initiator in catalytic cracking reaction for the first time. Experiments indicated that the introduction of PHPG could significantly promote the conversions and light olefins yields in naphtha and model compounds tests (e.g., conversion and yield of light olefins from octane increased by 10.31 and 4.73 percentage points). Control experiments of thermal cracking and analysis of catalytic cracking products selectivities were supportive for the proposal that PHPG functionalized carbenium mechanism by enhancing the carbenium formation step. A first-order power law model was established based on the reaction rate derivation of octane and ethyl-cyclohexane catalytic cracking. Kinetics study revealed the reduction in activation energy (e.g., for octane by 4.2%), and therefore illustrated the alternative reaction path created by the introduced PHPG.