Study On Biological Heavy Oil Prepared By Biomass And Bio-asphalt

With the depletion of oil resources,the supply of asphalt materials for road construction will eventually be faced with a supply crisis.Similar to petroleum bitumen,bio oil is also an organic polymer material transformed from biomass resources,which has a potential for partial or complete replacement of petroleum bitumen.In this paper,lignocellulosic biomass is used as the raw material to prepare biomass heavy oil,and the heavy oil is mixed in 50# matrix asphalt in proportion to make biological asphalt,and the performance of bio asphalt and 50# and 70# matrix asphalt are compared.In this paper,waste wood chips are selected as the representative of lignocellulosic biomass liquefaction,nitrogen is liquefied protective gas,the mixture of ethanol and ethylene glycol is selected as liquefied solvent,and wood chips are liquefied by solvent thermal liquefaction.The liquefied products are distilled and distilled by filter cloth and vacuum distillation.This paper focuses on the effects of five technological parameters of mixed solvent,liquid to solid ratio,catalyst dosage,reaction temperature and residence time on the yield of bio oil were studied.When the five process parameters were 1:1,6,3%,250,and 30 min,there was a high yield of heavy oil.In this paper,the calorific values of heavy oil,wood chips and fossil fuels were analyzed by the calorific value,NMR and GC-MS were used to test the composition and composition of heavy oil.FT-IR was used to compare the difference between the functional groups of various liquefaction products and heavy oil and 70# matrix asphalt.ICP was used to compare the elements difference between heavy oil,solid residue and 70# matrix asphalt.TG and GPC were compared with heavy oil and 70# matrix asphalt respectively.The thermal stability,molecular weight and its distribution of green were characterized by SEM.It is found that the element composition and molecular weight of heavy oil and 70# matrix asphalt are different,but there are the same functional groups,and the heavy oil has good thermal stability,and it has the potential to be used as road cementing material.Biodiesel bitumen was blended with 50# base asphalt at a certain proportion,and the properties of bio bitumen and 50# and 70# matrix asphalt were compared.The basic physical properties of each asphalt sample are compared by three major indexes;the viscosity of each asphalt sample under different temperature conditions is tested by the brucellus viscometer,the mixing and compaction temperature of each bitumen sample is compared,the adhesion characteristics of the asphalt and the aggregate are tested by the boiling method;DSC is used to test the Tg of the biological bitumen and the matrix bitumen,and the asphalt is compared to each other.The low temperature properties of the samples were tested by DSR,the temperature scanning test,the frequency scanning test and the MSCR test were used to compare the permanent deformation resistance,shear resistance and creep properties of the asphalt samples.The results show that 10% heavy oil content of bio asphalt and 70# matrix asphalt have similar three major indexes and viscosity,low temperature performance,high temperature resistance to permanent deformability,shear resistance and creep performance are better than that of 70# matrix asphalt.This paper prepare biomass heavy oil and bio bitumen by using wood biomass as raw materials,not only to make use of the waste biomass resources,but also to save non renewable fossil resources,which is in line with the green concept of the long-term development of road construction.Through studying the performance of heavy oil and biological asphalt,it can provide reference for the research of biological asphalt instead of petroleum asphalt.