Production of aromatic hydrocarbons from catalytic pyrolysis of lignin over acid-activated bentonite clay
Production of aromatic hydrocarbons from catalytic pyrolysis of lignin over acid-activated bentonite clay
复制标题
DOI：
10.1016/j.fuproc.2017.03.033
复制
发表时间：
2017-08-01
影响因子：
7.5
通讯作者：
Rabie, A. M.
中科院分区：
文献类型：
--
作者：
Elfadly, A. M.;Zeid, I. F.;Rabie, A. M.
以天然膨润土（主要是钠基蒙脱石）为原料，采用HCl、H2SO 4和H3 PO 4酸活化，并经提纯后用于木质素的催化快速热解（CFP）。通过XRD、N2-吸附-脱附、FTIR、TGA和NH3-TPD分析，研究了活性白土的晶型和酸性变化。在下流式微反应器中，在流动氮气（无氧）中，在500-650 ℃的温度范围内，评价粘土的木质素转化活性和选择性。采用盐酸活化膨润土催化改质，提高了苯-甲苯-二甲苯（BTX）、萘等高附加值单环芳烃的收率。在550-650 ℃温度范围内，用盐酸活化的膨润土大大提高了对二甲苯、萘和甲基萘的选择性。最佳反应条件为：催化剂与木质素的比例为3：1，氮气流量为75 ml/min，反应温度为600 ℃。(C)2017爱思唯尔B. V.保留所有权利。
Natural bentonite clay (mainly sodium-rich montmorillonite) both purified and acid activated using HCl, H2SO4, and H3PO4 acids were applied to the catalytic fast pyrolysis (CFP) of lignin. The modifications in crystalline structure and acidity of the activated clay were investigated via XRD, N-2-adsorption-desorption, FTIR, TGA and NH3-TPD analysis. The activity and selectivity of the clays were evaluated for lignin conversion in down-flow micro reactor in the temperature range 500-650 degrees 0C in flowing Nitrogen (oxygen-free). The yields of high value added monocyclic aromatics such as BTX (benzene- toluene- xylenes) and naphthalene were increased by catalytic upgrading using HCl-activated bentonite clay. The selectivity for o&p-xylenes, naphthalene, and methyl naphthalene were greatly enhanced using HCl-activated bentonite in the temperature range 550-650 degrees C. The catalyst: lignin ratio 3:1 and the nitrogen flow rate 75 ml/min, at 600 degrees C were the optimum conditions. (C) 2017 Elsevier B.V. All rights reserved.