Catalytic upgrading of Kraft lignin derived bio-oil in supercritical ethanol over different crystal size hierarchical nano-HZSM5

被引：9
作者：
Agarwal, Ashutosh [1 ]
Park, Seong-Jae [1 ]
Park, Jeong-Hun [1 ]
机构：
[1] Chonnam Natl Univ, Dept Environm & Energy Engn, Gwangju 61186, South Korea
来源：
FUEL | 2020年 / 271卷
基金：
新加坡国家研究基金会;
关键词：
Upgrading; Bio-oil; HZSM5; Kraft lignin; Hierarchical; TEMPERATURE-PROGRAMMED DESORPTION; ZSM-5; ZEOLITES; PERFORMANCE; METHANOL; BIOMASS; H-ZSM-5; ACIDITY; PYROLYSIS; CRACKING; FUELS;
D O I：
10.1016/j.fuel.2020.117630
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
In this study, different crystal size hierarchical nano-HZSM5 single crystals were hydrothermally synthesized by using a mixture with the molar composition of 3TPAOH:0.5Na(2)O:0.5Al(2)O(3):25SiO(2):xH(2)O. Based upon the value of x, the synthesized nano-HZSM5 were designated as HZSM5-375, HZSM5-450 and HZSM5-750. These were characterized by XRD, TEM, EDS, NH3-TPD, and N-2 adsorption/desorption isotherms. The synthesized zeolites exhibited large total surface area and mesopore volume than commercial HZSM5-P38. These zeolites were employed for upgrading of Kraft lignin derived liquefaction bio-oil in a batch reactor at 300 degrees C in supercritical ethanol. The chemical compositions of the upgraded bio-oil samples were determined by GC-MS and CHNS elemental analysis. Among all the zeolites used in this research, HZSM5-375 was found to be the best catalyst for bio-oil upgrading due to its small crystal size and significantly large very-strong acid site content. Upon bio-oil upgrading, the HHV value of the stock bio-oil increased from 27.03 MJ/Kg to 30.85 MJ/Kg over HZSM5-375 zeolite. Lastly, the spent catalysts were rejuvenated and characterized by solid-state Al-27/Si-29 MAS-NMR and XRD techniques. The catalytic performance of rejuvenated HZSM5-375 zeolite was found to decrease due to the loss of Al atoms from the zeolite framework.
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页数：9
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