Coprocessing of crude oil residue and waste plastics

摘要

Of the many environmental issues such as global warming and acid rain, amount obtained waste plastics is on of the most pressing. There are some processes of thermal and material utilization of waste plastics. Adressing the raw material use of municipal plastic waste in an environmentally safe and economically feasible manner must be undertaken. In addition to the environmental problem based on waste plastics there is a problem with heavy crude oil residue, too. Utilization of the waste stream plastics and generated vacuum destination residue with conversion by pyrolysis would significantly reduce the amount of these materials and would have the added bonus of transforming a problematic waste stream material into a beneficial form. Furthermore, in case of co-pyrolysis of both, mentioned materials serve as feedstocks.One primary reason for this research is to achieve higher cracking depth of crude oil to increase and/or improve destillable yields of crude oil based on transfer of hydrogen which plastics contain with regard to economical profit. Therefore too, conversion process during co-cracking of crude oil residue and plastics have been investigated under N_2-atmosphere and without catalyst to set down process costs. An other primary object is the investigation of synergetic effects in the case of co-pyrolysis of mentioned materials.Actually work deals with screening tests and polystyrene as aromatic plastic and polypropylen as paraffinic plastic are used for experimental investigations. This project aimed of recognition of especially major reaction influential parameters like residence time, temperature, plastic share of residue/plastic blend and pressure.To minimize necessarily runs and to determine optimal parameters a statistical run schedule have been used. The used experimental facility is complete balanceable with regard to elemental and mass balance. In addition of these runs experiments with microreactors have been carried out to check possible influence of heating up velocitiy on process and to compare won results.