Using in situ infrared catalytic reaction device and Fourier transform infrared spectrometer (FT-IR),CaCl2·6H2O,FeCl3·6H2O and Cs2SO4 as catalysts,the evolution characteristics of functional groups during catalytic pyrolysis of DCLR by adding three different catalysts and different content of Fe3+were compared and analyzed.The results showed that the three catalysts all promoted the polycondensation of DCLR to some extent;for the sample with FeCl3·6H2O as catalyst,the peak of benzene skeleton structure shifted from 1546 cm-1 to 1600 cm-1 when the pyrolysis temperature was about 500℃,indicating that the polycondensation reaction in DCLR was greater than the decomposition reaction,the degree of polycondensation of aromatic skeleton structure increased,and the thickened ring system increased;by comparing the catalytic effects of different concentrations of FeCl3·6H2O on the pyrolysis of aliphatic methyl and methylene during the heating process,it was found that Fe3+inhibited the removal of aliphatic methyl during the pyrolysis of DCLR,and with the increase of the content of Fe3+in the sample (within the mass fraction range of 1%～10%),the stronger the inhibition effect.
关键词
煤直接液化残渣/催化热解/官能团演变
Key words
Coal direct liquefaction residue/Catalytic pyrolysis/Functional group evolution
维普
万方数据