Production of phenolic compounds in catalytic pyrolysis of bagasse lignin in the presence of Ca_(0.5)Pr_(0.5)FeO_(3)  

作　　者：Hongjing Han Qin Ge Mei Zhang Yanguang Chen Haiying Wang Yanan Zhang Yizhen Wang Hua Song Chunlei Zhang 

机构地区：[1]College of Chemistry&Chemical Engineering,Northeast Petroleum University,Daqing 163318,China [2]Heilongjiang Provincial Key Laboratory of Oil&Cos Chemical Technology,Daqing 163318,China

出　　处：《Journal of Rare Earths》2022年第2期279-288,I0004,共11页稀土学报（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(21908021);the Excellent Youth Foundation of Heilongjiang Province,China(JC2018002);the Youth Fund of Northeast Petroleum University(2018QNL-17)。

摘　　要：Herein,sodium dodecylbenzene sulfonate(SDBS)was used as a template to control the synthesis of Ca_(0.5)Pr_(0.5)FeO_(3).Its microstructure,composition,and morphology were detected via X-ray diffraction(XRD),Fourier transform infrared spectroscopy(FT-IR),and scanning electron microscopy(SEM).The properties of catalyzing bagasse lignin(BL)pyrolysis were determined by thermogravimetric analysis(TG)test and evaluation of a fixed bed alumina microreactor.The results show that the sample Ca_(0.5)Pr_(0.5)FeO_(3)regulated by SDBS has a cubic crystal phase,and the addition of SDBS does not cause phase transition.Moreover,when the SDBS concentration is 0.10 mol/L,the particle size is 200-500 nm and the specific surface area is 11.26 m^(2)/g.The yields of gas,liquid,and solid products in the BL catalytic pyrolysis are 39.58 wt%,26.76 wt%and 32.36 wt%,respectively.The contents of CO_(2)and CO decrease from 54.07%and 4.98%to 45.29%and 3.23%,respectively.The liquid products are mainly guaiacol,syringol,and phenol,and the total selectivity of phenols is 83.67%,accompanied by a small amount of non-aromatic oxygen-containing compounds(five-membered ring(furan)or ester).Compared with the BL pyrolysis and Ca_(0.5)Pr_(0.5)FeO_(3)catalytic pyrolysis products,the selectivity of guaiacol compounds increases by43.26%,while those of syringol compounds and phenylketones decrease by 30.08%and 3.39%,respectively.The selectivity of 2,6-dimethoxyphenol is 28.37%.After five catalytic pyrolysis-regeneration cycles,the characteristic peaks of the catalyst do not change significantly and the particles are uniform,suggesting that the catalyst has good crystal phase stability and regeneration stability.

关 键 词：Bagasse lignin Calcium ferrite Pr doping Catalytic pyrolysis GUAIACOL Rare earths 

分 类 号：TQ243.1[化学工程—有机化工] TQ426