Molecular characterisation of biomass pyrolysis oil and petroleum fraction blends

摘要

Mixing biomass pyrolysis oil with existing petroleum fractions is one potential option for integration of renewable sources into the oil refinery. To achieve such optimal integration, it is first important to conduct detailed molecular-level characterisation of the blended streams such as biomass fast pyrolysis oil (FPO), vacuum gas oil (VGO), and FPO-VGO mixture. Existing molecular-level characterisation method based on Molecular Type and Homologous Series (MTHS) matrix approach is extended to allow for characterisation of oxygenated molecules in bio oil. The group contribution method is introduced into the transformation methodology in order to calculate bulk properties of oxygenated homologous series within the representation matrix. Different constraints strategies proposed in the existing literature are applied to reduce the degrees of freedom and solution space of the optimisation problem. The computational results show a good agreement between measured and model-predicted results.