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生物炭與木質(zhì)素混合成型及其燃燒特性研究
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“十二五”國家科技支撐計劃項目(2014BAD06B04)、黑龍江省科學(xué)基金項目(QC2015049),、東北農(nóng)業(yè)大學(xué)博士基金項目(2012RCB97)、黑龍江省教育廳科學(xué)技術(shù)研究項目(12531002)和東北農(nóng)業(yè)大學(xué)青年才俊項目(14QC36)


Molding Fuel and Combustion Characteristics of Biochar and Lignin
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    摘要:

    以油茶殼熱解炭粉和膠黏劑為原料,,利用萬能試驗機進行生物質(zhì)混合燃料成型試驗。通過對比不同成型燃料抗壓強度,、松弛密度和比能耗,,確定膠黏劑種類對燃料品質(zhì)的影響。選取木質(zhì)素作為膠黏劑考察了成型壓力,、溫度,、含水率、木質(zhì)素添加量對成型燃料品質(zhì)的影響,,當優(yōu)化成型工藝參數(shù)為成型壓力6kN、成型溫度80~100℃,、含水率20%,、木質(zhì)素添加量8%~9%時燃料品質(zhì)最佳。對成型燃料進行熱重試驗,,研究其燃燒過程及動力學(xué)特性,。結(jié)果表明:燃燒主要分為4個階段,著火溫度為356.9℃,燃盡溫度為553.3℃,;燃料的揮發(fā)分燃燒是一級反應(yīng),,固定碳燃燒是二級反應(yīng)。

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    With the increasing depletion of fossil energy, people pay more and more attention to renewable energy. Biomass energy is considered to be the most potential energy, which is a research hotpoint for its cleanness, efficiency and safety. The development and utilization of biomass energy plays an important role in achieving sustainable development, improving the living environment and reducing carbon dioxide. Owing to the flourishing pore structure, biochar as a main product of biomass conversion has been widely used in the fields of adsorption separation, catalytic carrier and fuel and so on. The biochar prepared from Camellia oleifera shell pyrolysis and adhesive as raw materials was molded by using universal testing machine. By analyzing the compressive strength, relax density and specific energy consumption of molding fuel, the effects of different adhesives on physical quality of molding fuel were made sure. The influence of molding pressure, temperature, moisture content and lignin content was studied with lignin as molding fuel adhesive. The results showed that the fuel quality was the best at molding pressure of 6kN, molding temperature of 80~100℃, moisture content of 20% and lignin content of 8%~9%. Scanning electron microscopy (SEM) was used to study the microstructure of the fuel. The results showed that lignin can promote the formation of carbon powder particles, the structure of the fuel is complete and the surface is smooth. The combustion characteristics and kinetics of the fuel were studied by thermogravimetric analysis. The results showed that the combustion process included four periods: the dehydration stage of the raw material, the precipitation and combustion of volatile components, the combustion stage of the fixed carbon and the burnout stage, and the ignition temperature and burnout temperature was 356.9℃ and 553.3℃, respectively. The volatile combustion was a first order reaction, and the fixed carbon combustion was a two stage reaction. The significance of the research was to provide theoretical basis for the preparation of biomass carbon fuel which was easy to transport and storage.

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秦麗元,張世慧,高忠志,蔣恩臣.生物炭與木質(zhì)素混合成型及其燃燒特性研究[J].農(nóng)業(yè)機械學(xué)報,2017,48(4):276-283. QIN Liyuan, ZHANG Shihui, GAO Zhongzhi, JIANG Enchen. Molding Fuel and Combustion Characteristics of Biochar and Lignin[J]. Transactions of the Chinese Society for Agricultural Machinery,2017,48(4):276-283.

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  • 收稿日期:2017-01-22
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  • 在線發(fā)布日期: 2017-04-10
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