The process features of pyrolysis carbonization of Huangjiu lees to biochar
In order to find out the evolution law of Huangjiu lees during pyrolysis and carbonization,the relationship between mass loss of Huangjiu lees and temperature was studied by thermogravimetric anal-ysis.Then,the pyrolysis product was characterized by elemental composition analysis,Boehm titration and Fourier transform infrared spectroscopy(FT-IR).The decomposition of Huangjiu lees during pyrolysis was mainly focused on(250-500)℃ with the most intense pyrolysis at(300-370)℃.The predominant reaction of Huangjiu lees carbonization at(220-300)℃ was dehydration,and deoxygenation at(300-370)℃,such as decarbonylation,decarboxylation,and ether bond cleavage reaction,etc.The predomi-nant carbonization reaction shifted from deoxygenation toward dehydrogenation at(370-500)℃,such as demethylation and demethylenation.Meanwhile,the content of aliphatic hydrocarbons in the product decreased gradually and that of the aromatic structure increased.The predominant carbonization was condensation at exceeded 500 ℃.The aromaticity of product increased with temperature and condensed aromatic structures emerged highly in the product.The specific surface area of Huangjiu lees-based biochar activated by ZnCl2 was 1 155 m2·g-1,which could be used as catalyst carrier.
catalyst engineeringHuangjiu leesbiocharpyrolysiscarbonizationsurface functional group
万方数据
维普
