Understanding The Co-pyrolysis Behavior Of Indonesian Oil Sands And Corn Straw

Pyrolysis process plays an important role in energy utilization.In order to convert the pyrolysis feedstocks in an efficient and clean way,we studied the co-pyrolysis behaviors of Indonesian oil sands and corn straw using thermogravimetric analysis(TGA)and a fixed bed reactor,so as to investigate the synergetic effect during copyrolysis process.In this work,thermogravimetric analysis was first conducted to study the thermal decomposition behaviors of individual and blend feedstocks.The influence of different heating rates and blend ratios on the co-pyrolysis behaviors was also studied.The results of TGA showed that improved pyrolysis characteristics and higher conversion were observed,indicating a remarkable synergetic effect.A fixed bed reactor was used to conduct co-pyrolysis experiments of Indonesian oil sands and corn straw.In order to achieve a relatively high conversion of the feedstocks,the pyrolysis experiments were first conducted using four different pyrolysis methods and the pyrolysis operating conditions were further optimized.Different liquid product yields using different pyrolysis methods were caused by different vapor residence time.The conversions of organics were higher using vacuum pyrolysis and pyrolysis under nitrogen.The individual pyrolysis experiments and co-pyrolysis experiments of Indonesian oil sands and corn straw were also carried out using a fixed bed reactor under nitrogen,and the product yields distribution and characterization were investigated to study the synergetic effect.The results showed that the co-pyrolysis liquid product yield was increased.The contents of water and heavy organics in liquid were decreased.The liquid product characterization also indicated the significant synergetic effect on the liquid chemical composition.Valuable phenols and alcohols were increased,while unstable aldehydes were decreased,suggesting the chemical interactions between two feedstocks during co-pyrolysis process.The yield improvement and compositional variations of the co-pyrolysis liquid product were beneficial for its use as fuel and chemicals feedstock.