Development of Bioenergy from Chromium-Copper-Arsenate (CCA) Treated Wood Wastes
利用铬铜砷酸盐 (CCA) 处理的木材废料开发生物能源
基本信息
- 批准号:13680576
- 负责人:
- 金额:$ 2.3万
- 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:2001
- 资助国家:日本
- 起止时间:2001 至 2002
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Disposal of woods treated with chromated copper arsenate (CCA) preservatives has become a serious problem in the world. Environmentally benign disposal technologies have to be developed. We have tried to find pyrolysis conditions for CCA treated wood in order to maximize the retention of arsenic in wood charcoal along with a high oil yield. In 2002, a CCA treated sample given an extra heat treatment at 450℃ for 10 min was thoroughly investigated in order to establish the details of the reaction in which arsenic is captured in the pyrolysis residue prior to volatilization. Composition and structure of the metal compounds in the pyrolysis residue were examined by transmission electron microscopy. Alarge number of particles were found of variable diameter between 10 and 100 nm. The smaller ones were mostly spherical, sometimes faceted. The larger ones were lumpy. CCA compounds and their reaction products like Cr_2As_4O_<12> and As_2O_3 were identified in conventional TEM by Selected Area Electron Diffraction. In high resolution, the nanoparticles exhibited lattice fringes as indication of their mono crystalline character, fitting, e.g. the d_<210> = 0.204 nm of Cr. The volatility of arsenic during pyrolysis of CCA treated wood was measured by XRF (X-Ray Fluorescence) analysis at temperatures up to 500℃ and at times up to one hour. Weight change and arsenic content of the pyrolysis residue were measured after dissolution in HMO_3. More than 20 % of arsenic was already lost at 300℃, which may have been caused mainly by the volanlization of the unreacted arsenic compound after reduction of As(V) in As_2O_5 to As(III) in As_2O_3. Arsenic is probably released as As_4O_6, which is very difficult to capture and toxic. By an additional heat treatment this reduction can be prevented and the dry separation of the metals may be allowed
用铬化砷酸铜(CCA)防腐剂处理的木材的处理已成为世界上一个严重的问题。必须开发对环境无害的处置技术。我们试图找到CCA处理木材的热解条件,以便最大限度地保留木炭中的砷,并获得高产油量。2002年,对经过CCA处理的样品在450℃下额外热处理10分钟进行了彻底的研究,以确定在挥发之前砷在热解残渣中被捕获的反应细节。利用透射电镜对热解残渣中金属化合物的组成和结构进行了分析。大量的颗粒直径在10到100纳米之间。较小的大多是球形的,有时是多面的。较大的是块状的。用选择区电子衍射法对CCA化合物及其反应产物Cr_2As_4O_<12 bbb_和As_2O_3进行了常规透射电镜鉴定。在高分辨率下,纳米颗粒表现出晶格条纹,表明其单晶特征,如Cr的d_<210> = 0.204 nm。在温度高达500℃,时间长达1小时的情况下,用XRF (x射线荧光)分析测量了CCA处理木材热解过程中砷的挥发性。测定了热解残渣在HMO_3中溶解后的质量变化和砷含量。300℃时砷已损失20%以上,这可能是As_2O_5中的As(V)还原为As_2O_3中的As(III)后未反应的砷化合物挥发所致。砷可能以As_4O_6的形式释放,As_4O_6很难捕获且有毒。通过额外的热处理可以防止这种还原,并且可以允许金属的干分离
项目成果
期刊论文数量(39)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
畑 俊充, 今村祐嗣: "解体廃材の選択的木炭化技術の開発"京都大学木質科学研究所 平成14年度京都大学木質科学研究所 所内プロジェクト研究成果報告書. 83-92 (2003)
Toshimitsu Hata、Yuji Imamura:“拆除废物选择性炭化技术的开发”京都大学木材科学研究所 2002 京都大学木材科学研究所内部项目研究结果报告 83-92(2003)。
- DOI:
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T.Hata et al.: "About Bio-oil (in Japanese)"Kodansha. 369. 3050308 (2001)
T.Hata 等:“关于生物油(日语)”讲谈社。
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畑 俊充, 今村祐嗣: "保存処理廃材のリサイクル利用の現状と熱処理によるオイル化の試み"木材保存. Vol.28-2. 48-55 (2002)
Toshimitsu Hata,Yuji Imamura:“回收处理废木材的现状并尝试通过热处理将其转化为油”《木材防腐》第 28-2 卷(2002 年)。
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- 影响因子:0
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T.Hata, D.Meler, T.Kajimoto, H.Kikuchi, Y.Imamura: "Development of Biooil by Thermal Conversion from Wood"1^<st> Advanced Environmental Energy Forum Symposium. (2001)
T.Hata、D.Meler、T.Kajimoto、H.Kikuchi、Y.Imamura:“通过木材热转化开发生物油”1^<st>高级环境能源论坛研讨会。
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- 影响因子:0
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T.Hata: "How to Treat Wood Charcoal Containing Heavy Metals, Development of Comprehensive Technologies for Environmental Conversion including Prevention of Global Warming by Carbonization of Wood, etc, in the fiscal 2001"236. 57-60 (2002)
T.Hata:“2001财政年度如何处理含有重金属的木炭,开发环境转化综合技术,包括通过木材碳化防止全球变暖等”236。
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HATA Toshimitsu其他文献
HATA Toshimitsu的其他文献
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{{ truncateString('HATA Toshimitsu', 18)}}的其他基金
Development of new lithium-ion batteries from wood-based carbon materials with carbon nanotubes
利用碳纳米管木质碳材料开发新型锂离子电池
- 批准号:
18380107 - 财政年份:2006
- 资助金额:
$ 2.3万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
DEVELOPMENT OF THERMAL CONVERSION TECHNOLOGY FROM WOOD CHARCOAL TO CARBON NANOTUBES
木炭热转化为碳纳米管技术的进展
- 批准号:
15380119 - 财政年份:2003
- 资助金额:
$ 2.3万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
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