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当前位置: 首页 > 文章 > 改性木质素粘结生物质炭包膜尿素肥料性能试验 农业机械学报 2016,47 (5) 171-176+182
Position: Home > Articles > Study on Biochar Coated Urea Fertilizer with Lignin Adhesive Modified by Different Solvents Transactions of the Chinese Society for Agricultural Machinery 2016,47 (5) 171-176+182

改性木质素粘结生物质炭包膜尿素肥料性能试验

作  者：
秦丽元;王秋静;蒋恩臣;罗立娜;高忠志
单  位：
东北农业大学工程学院
关键词：
木质素;乙醇;木醋液;粘结剂;生物质炭包膜尿素;性能试验
摘  要：
采用包膜造粒的方法,分别以乙醇和木醋液溶解木质素作为粘结剂制备生物质炭包膜尿素肥料,并通过扫描电镜、傅里叶红外光谱和差热分析对其性能进行表征。发现木质素没有发生化学变化,但是木醋液溶剂使木质素团状结构更好地展开,差热分析结果显示木质素木醋液粘结剂玻璃化温度阶梯状态消失,能在较宽温度范围保持黏流态,黏度比乙醇处理后高300%。对2种粘结剂制备的生物质炭包膜尿素肥料的成粒性能进行比较,发现以木质素木醋液粘结剂制备的生物质炭包膜尿素肥料具有269.4%的包膜率和94.83%的成粒率,粒径分布均匀且合格粒径比重高达80%;所有粒径的力学性能均满足要求,缓释性能也更优异。木质素溶于木醋液粘结性能比溶于乙醇性能好,更适用于生物质炭包膜尿素肥料的制备。
译  名：
Study on Biochar Coated Urea Fertilizer with Lignin Adhesive Modified by Different Solvents
作  者：
Qin Liyuan;Wang Qiujing;Jiang Enchen;Luo Li'na;Gao Zhongzhi;College of Engineering,Northeast Agricultural University;
关键词：
lignin;;ethanol;;wood vinegar;;adhesive;;biochar coated urea;;performance test
摘  要：
Many straws and wastes should be treated effectively every year in China. The improper treatments of these wastes have caused severe environmental pollutions. At the same time,with the growing energy demand of the word,biomass conversion technologies have attracted considerable attention because they effectively convert biomass into renewable energy products. It's found that the biochar,as the main product of pyrolysis technology,could improve the properties of the soil and stay for a long time in the soil. The biochar has a good prospect working as the soil amendment,but difficult to transport,storage and use directly. Therefore,molded biochar was necessary and it could be used as the fertilizer carrier. The biochar-based urea fertilizer can reduce nutrient release rate and improve efficiency of fertilizers,as well as environmental benefits of soil. Thus,the ethanol and wood vinegar were chosen to dissolve the lignin which were used as adhesive during preparing the biochar coated urea fertilizer. The properties of biochar coated urea with different lignin adhesive were characterized by scanning electron microscopy( SEM), Fourier transform infrared spectroscopy( FTIR), viscometer and differential scanning calorimety( DSC) methods. The universal testing machine and homemade leaching equipment were used to analyze the biochar coated urea's mechanics and slow-release property. The experimental results showed that there is no obvious chemical reaction in the two solutions,and the lignin-wood vinegar adhesive had a better surface properties and the viscosity value is 300% higher than lignin-ethanoladhesive. Comparing with the biochar coated urea of different adhesives,it is found that the lignin-wood vinegar adhesive biochar coated urea has a higher coated and granulation rates which are up to 269. 4%and 94. 83% respectively; the particle size distribute uniform and qualified rate is almost up to 80%; the mechanics and slow release properties are superior too. Hence the lignin-wood vinegar adhesive had a better performance on the viscosity and surface properties than lignin-ethanol adhesive,which is more suitable for the preparation of biomass carbon coated urea.

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