کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7159534 | 1462807 | 2018 | 14 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Towards the development of a novel “bamboo-refinery” concept: Selective bamboo fractionation by means of a microwave-assisted, acid-catalysed, organosolv process
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Towards the development of a novel “bamboo-refinery” concept: Selective bamboo fractionation by means of a microwave-assisted, acid-catalysed, organosolv process Towards the development of a novel “bamboo-refinery” concept: Selective bamboo fractionation by means of a microwave-assisted, acid-catalysed, organosolv process](/preview/png/7159534.png)
چکیده انگلیسی
This work addresses a novel microwave-assisted, acid-catalysed, organosolv (EtOH/H2O) system for the selective fractionation of bamboo, examining the effects of the temperature (110-190â¯Â°C), solvent system (EtOH/H2O) and catalyst amount (0-5â¯vol.% formic acid) on the process. The statistical analysis of the results revealed that the operating variables have a significant influence on bamboo fractionation, allowing the selective production of (i) a cellulose-rich solid fraction, (ii) a hemicellulose rich water-soluble fraction and (iii) a lignin rich solid fraction. The yields of each of these fractions varied between 51 and 94%, 2 and 23% and 2 and 32%, respectively. Increasing temperature exerted a positive effect on bamboo decomposition, increasing the overall bamboo conversion and influencing the effect that the solvent system (EtOH/H2O) has on the process. At low temperature (110â¯Â°C) the solvent system does not have much influence, while a synergetic interaction between EtOH and H2O took place at higher temperatures, which allowed better results to be obtained with EtOH/H2O mixtures than with the pure solvents alone. The effect of the catalyst was relatively weak, being greatest when using a high temperature (190â¯Â°C) and high proportions of water (>85â¯vol.%) in the solvent system. With respect to the properties of each fraction, the cellulose rich solid fraction was made up of un-reacted cellulose (44-83â¯wt.%), hemicellulose (0-21â¯wt.%) and lignin (12-34â¯wt.%); the water-soluble hemicellulose rich fraction consisted of a mixture of oligomers, sugars, carboxylic acids, ketones and furans; and the solid rich lignin fraction comprised high purity (>95â¯wt.%) organosolv lignin. The optimisation of the process revealed that by using a temperature of 190â¯Â°C, a solvent system consisting of 45â¯vol.% EtOH and 55â¯vol.% H2O with a concentration of formic acid of 5â¯vol.% it is possible to fractionate bamboo into a high purity (84â¯wt.%) cellulose solid fraction, very pure (>95%) organosolv lignin and a rich water-soluble hemicellulose fraction consisting of a mixture of oligomers (27â¯wt.%), sugars (56â¯wt.%) and carboxylic acids (14â¯wt.%); thus converting this process into a very promising method for the selective fractionation of bamboo.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Energy Conversion and Management - Volume 155, 1 January 2018, Pages 147-160
Journal: Energy Conversion and Management - Volume 155, 1 January 2018, Pages 147-160
نویسندگان
T. Li, J. Remón, Z. Jiang, V.L. Budarin, J.H. Clark,