Influence of calcination temperature for LaTi0.2Fe0.8O3 on catalytic pyrolysis of bagasse lignin

LaTi0.2Fe0.8O3 (LTF) was prepared by the sol-gel method, and the effects of calcination temperature on the structure and properties were investigated. A new method of preparing aryl oxygen-containing compounds from bagasse lignin (BL) by the catalytic pyrolysis over LTF was proposed. The results show that LTF has cubic crystal phase and porous structure and its optimal calcination temperature is 800 degrees C (LTF-800). In the test for catalytic pyrolysis of BL, with the addition of LTF-800, the yield of liquid product reaches the maximum; the contents of phenolics, guaiacols, syringols, phenylates and furans increase obviously, while those of benzenes, esters and carboxylic acid decrease. The total content of aryl oxygen-compounds (including phenolics, guaiacols, syringols and phenylates) in liquid product is more than 74 wt% with the addition of LTF-800, larger than that obtained by single BL pyrolysis (62 wt%). LTF could avoid oxygen-containing functional groups from being excessively destroyed. It has nice regeneration performance by controlled combustion of char even after 5 cycles. (C) 2019 Chinese Society of Rare Earths. Published by Elsevier B.V. All rights reserved.