Polyhydric alcohol liquefaction of some lignocellulosic agricultural residues |
| |
| Authors: | El-barbary M Hassan Nadia Shukry |
| |
| Institution: | 1. Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, PR China;2. Center for Renewable Carbon, The University of Tennessee, Knoxville, TN 37996-4570, USA;1. College of Energy, iChEM, Xiamen University, Xiamen, Fujian, 361102, China;2. Department of Biological Systems Engineering, University of Wisconsin-Madison, Madison, WI, 53706, United States;1. Center for Advanced Polymer Research, Beltrán Mathieu 224 Piso 2, Concepción, Chile;2. Chemical and Environmental Engineering Department, University of the Basque Country, Plaza Europa 1, 20018 Donostia-San Sebastián, Spain;1. College of Forestry, Northwest A&F University, Yangling, Shaanxi, 712100, China;2. Institute for Chemicals and Fuels from Alternative Resources (ICFAR), Western University, London, Ontario, N6A 5B9, Canada;1. Engineering Laboratory for Energy System Process Conversion & Emission Control Technology of Jiangsu Province, School of Energy & Mechanical Engineering, Nanjing Normal University, Nanjing 210042, China;2. Institute of Chemical Industry of Forest Products, China Academy of Forest, 210042, China |
| |
| Abstract: | Liquefaction of bagasse and cotton stalks was conducted by using polyhydric alcohols (polyethylene glycol PEG#400 and glycerin) in the presence of sulfuric acid (SA) as a catalyst. The effects of different liquefaction conditions, such as ratio raw material/liquefying solvent, effect of PEG#400/glycerin, acid concentration, liquefaction temperature and time on the liquefaction yield have been investigated. The hydroxyl and acid numbers for some liquefied samples were also determined. The results showed that the minimum residue content was obtained at 1/5 raw material to liquefying solvent. PEG#400 alone is not favoured as liquefying solvent as it gives ～19% residual content for bagasse and ～22% for cotton stalks at the optimum studied reaction conditions. Replacing 10% of PEG#400 with glycerin as well as increasing the SA concentration, liquefaction temperature or time, decreased the amount of residue for both bagasse and cotton stalks to less than 10%. The hydroxyl number of the produced polyols slowly decreased from 253 to 223 mg KOH/g on extending the reaction time till 120 min and the residual polyols prevented re-condensation of the liquefied components. It seems that this system can be applied on various types of lignocellulosic agricultural residues. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
