| Characteristics and pyrolysis dynamic behaviors of hydrothermally treated micro crystalline cellulose | |
| Kong, Lingzhao; Miao, Pengjie; Qin, Jianguang | |
| 2013-03-01 | |
| 发表期刊 | JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
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| 卷号 | 100期号:100页码:67-74 |
| 摘要 | This paper describes the application of innovative hydrothermal technology on cellulose to produce power-like solid products appropriate for pyrolysis. The hydrothermal treatment (HT) was carried out in a batch reactor in the temperature range from 250 ◦C to 350 ◦C for 2 min. The effect of HT on the characteristics of samples was explored by FTIR, XRD, and SEM analyses. The pyrolysis behaviors of the samples obtained from HT were determined by investigating the samples weight loss (TG) and the rate of weight loss (DTG) through thermogravimetric analysis (TGA) in a steam of N2 from ambient to 500 ◦C under the heating rate of 10 ◦C/min. Kinetic parameters were obtained by Coats–Redfern method and used to model the TG curve. The results show that the HT is capable for converting cellulose to carbon-rich products having a high energy density. The cellulosic crosslink and crystalline structure is broken in the HT process especially at higher temperature. The TGA results confirmed that product obtained from HT at 250 ◦C is more suitable for the pyroylsis than other samples with the max rates of mass loss (3.12%/◦C) and conversion rate 99.91%. There was one decomposition stage in the pyrolysis of cellulose, while the HT products have two weight loss stages. The pyrolysis process can be described by one or two first-order reaction for cellulose and HT products, respectively. The obtained activation energy for second stage pyrolysis was comparably higher than that for the first stage. Depolymerisation dominates HT products obtained at 250 ◦C in the pyrolysis process and repolymerisation results in the formation of secondary char for HT products obtained at higher temperature. The experiments results help to understand and predict the pyrolysis behaviors and propose pre-treatment technology for practical biomass. ; This paper describes the application of innovative hydrothermal technology on cellulose to produce power-like solid products appropriate for pyrolysis. The hydrothermal treatment (HT) was carried out in a batch reactor in the temperature range from 250 degrees C to 350 degrees C for 2 min. The effect of HT on the characteristics of samples was explored by FTIR, XRD, and SEM analyses. The pyrolysis behaviors of the samples obtained from HT were determined by investigating the samples weight loss (TG) and the rate of weight loss (DTG) through thermogravimetric analysis (TGA) in a steam of N-2 from ambient to 500 degrees C under the heating rate of 10 degrees C/min. Kinetic parameters were obtained by Coats-Redfern method and used to model the TG curve. The results show that the HT is capable for converting cellulose to carbon-rich products having a high energy density. The cellulosic crosslink and crystalline structure is broken in the HT process especially at higher temperature. The TGA results confirmed that product obtained from HT at 250 degrees C is more suitable for the pyroylsis than other samples with the max rates of mass loss (3.12%/degrees C) and conversion rate 99.91%. There was one decomposition stage in the pyrolysis of cellulose, while the HT products have two weight loss stages. The pyrolysis process can be described by one or two first-order reaction for cellulose and HT products, respectively. The obtained activation energy for second stage pyrolysis was comparably higher than that for the first stage. Depolymerisation dominates HT products obtained at 250 C in the pyrolysis process and repolymerisation results in the formation of secondary char for HT products obtained at higher temperature. The experiments results help to understand and predict the pyrolysis behaviors and propose pre-treatment technology for practical biomass. (C) 2012 Elsevier B.V. All rights reserved. |
| 文章类型 | Article |
| 关键词 | Cellulose Pyrolysis Hydrothermal Treatment (Ht) Thermogravimetric Analysis (Tga) Kinetics |
| 学科领域 | 热化学转化 |
| WOS标题词 | Science & Technology ; Physical Sciences ; Technology |
| DOI | 10.1016/j.jaap.2012.11.019 |
| 关键词[WOS] | SUPERCRITICAL WATER ; CHEMICAL-PROCESS ; WOODY BIOMASS ; CARBONIZATION ; CONVERSION ; BIOCHAR |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS研究方向 | Chemistry ; Spectroscopy |
| WOS类目 | Chemistry, Analytical ; Spectroscopy |
| WOS记录号 | WOS:000316528300009 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.qibebt.ac.cn/handle/337004/1605 |
| 专题 | 热化学转化研究组 |
| 作者单位 | Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Key Lab Biofuels, Qingdao 266101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Kong, Lingzhao,Miao, Pengjie,Qin, Jianguang. Characteristics and pyrolysis dynamic behaviors of hydrothermally treated micro crystalline cellulose[J]. JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS,2013,100(100):67-74. |
| APA | Kong, Lingzhao,Miao, Pengjie,&Qin, Jianguang.(2013).Characteristics and pyrolysis dynamic behaviors of hydrothermally treated micro crystalline cellulose.JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS,100(100),67-74. |
| MLA | Kong, Lingzhao,et al."Characteristics and pyrolysis dynamic behaviors of hydrothermally treated micro crystalline cellulose".JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS 100.100(2013):67-74. |
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