Crystal Structure Change and Recrystalization of Cellulose in Supercritical Water
超临界水中纤维素的晶体结构变化和重结晶
基本信息
- 批准号:09650819
- 负责人:
- 金额:$ 2.18万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (C)
- 财政年份:1997
- 资助国家:日本
- 起止时间:1997 至 1998
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
1) In-situ observation using diamond anvil cell (DAC)Cellulose powders were loaded in a diamond anvil cell (DAC) with distilled water and heated up to 400 ゚C at a heating rate of 10゚C.Below 280゚C, cellulose particle size decreased generally with time. However, at a temperature range from 300゚C to 320゚C, the cellulose particles disappeared immediately without changing particle size and shape. This phenomenon suggests that cellulose dissolves into hot compressed water above 300゚C.The hydrolysis rate of cellulose in sub- or supercritical water was measured by using a flow type apparatus. We found that the drastic increase of the rate at around 350゚C.The one of the reason of the drastic increase of the hydrolysis rate of cellulose might be the dissolution of cellulose in hot water.2) Analysis of precipitatesWe found that white precipitates in the liquid effluent came out after few hours. This precipitate was analyzed by FTIR and identified as a cellulose-like material. The collected amount of precipitate in the liquid effluent increased with the reaction time and shows maximum at 400゚C.XRD analysis of the precipitate shows the cellulose crystal structure.
1)利用金刚石砧孔(DAC)原位观察纤维素粉末,用蒸馏水将其装入金刚石砧孔(DAC)中,以10‰的加热速率加热至400‰。在280℃以下,纤维素的粒径随时间的延长而减小。然而,在300 ~ 320ºC的温度范围内,纤维素颗粒在不改变粒径和形状的情况下立即消失。这种现象说明纤维素溶解在300ºC以上的热水中。用流动式装置测定了纤维素在亚、超临界水中的水解率。我们发现,在350℃左右,速率急剧增加。纤维素水解速率急剧提高的原因之一可能是纤维素在热水中的溶解作用。2)沉淀物分析我们发现,几小时后流出液中有白色沉淀物。该沉淀物经FTIR分析确定为纤维素样物质。出水沉淀物的收集量随着反应时间的延长而增加,在400℃时达到最大值。沉淀物的XRD分析显示纤维素的晶体结构。
项目成果
期刊论文数量(5)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
M.Sasaki et al.: "Cellulose Hydrolysis in Supercritical Water" Journal of Supercritical Fluids. 13. 261-268 (1998)
M.Sasaki 等人:“超临界水中的纤维素水解”超临界流体杂志。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
Mitsuru Sasaki et al.: "Cellulose hydrolysis in supercritical water" Journal of supercritical fluids. 13. 261-268 (1998)
Mitsuru Sasaki 等人:“超临界水中的纤维素水解”超临界流体杂志。
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- 发表时间:
- 期刊:
- 影响因子:0
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- 通讯作者:
K.Arai et al.: "Importance of Phase Equilibria for Understanding Reactions in Supercritical Fluids" Fluid Phase Equilibria. 印刷中 (1999)
K.Arai 等人:“相平衡对于理解超临界流体反应的重要性”流体相平衡已出版(1999 年)。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
Kunio Arai and Tadafumi Adschiri: "Importance of Phase Equilibria for Understanding Reactions in Supercritical Fluids" Fluid Phase Equilibria. (in press). (1999)
Kunio Arai 和 Tadafumi Adschiri:“相平衡对于理解超临界流体反应的重要性”流体相平衡。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
Mitsuru Sasaki et al.: "Cellulose Hydrolysis in Supercritical Water" The Journal of Supercritical Fluids. (印刷中). (1998)
Mitsuru Sasaki 等人:“超临界水中的纤维素水解”,《超临界流体杂志》(出版中)。
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- 影响因子:0
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ADSCHIRI Tadafumi其他文献
ADSCHIRI Tadafumi的其他文献
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{{ truncateString('ADSCHIRI Tadafumi', 18)}}的其他基金
New crystal structure predicted by mathematics
数学预测的新晶体结构
- 批准号:
23656500 - 财政年份:2011
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$ 2.18万 - 项目类别:
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20226015 - 财政年份:2008
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Supercritical synthesis of organic-monolayer modified nanocrystals and organic-inorganic hybrid nanomaterials
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17206078 - 财政年份:2005
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Elucidation of chemical synthesis from sugar and solvent effect on the reaction using supercritical microreactor
使用超临界微反应器阐明糖化学合成和溶剂对反应的影响
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14350413 - 财政年份:2002
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$ 2.18万 - 项目类别:
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Recovery of chemicals from sugar in supercritical fluids for oligochemistry cycle
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13555211 - 财政年份:2001
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$ 2.18万 - 项目类别:
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Reaction mechanism of hydrolysis in Supercritical water
超临界水水解反应机理
- 批准号:
11450295 - 财政年份:1999
- 资助金额:
$ 2.18万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
Hydrogenation and Liquefaction of Waste Plastics through Partical Oxidation and Water Gas Shift Reaction in Supercritical Water
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- 批准号:
10555270 - 财政年份:1998
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$ 2.18万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
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