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首页> 外文期刊>Bioresource Technology: Biomass, Bioenergy, Biowastes, Conversion Technologies, Biotransformations, Production Technologies >Pyrolysis temperature influences the characteristics of rice straw and husk biochar and sorption/desorption behaviour of their biourea composite
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Pyrolysis temperature influences the characteristics of rice straw and husk biochar and sorption/desorption behaviour of their biourea composite

机译：热解温度影响其生物稻草和稻壳生物炭的特征及其生物藻复合材料的吸附/解吸行为

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摘要

Biochar obtained by biomass pyrolysis has several energies, environmental, and agricultural applications. In the present study, influence of pyrolysis temperatures (300 degrees C, 450 degrees C and 600 degrees C) on characteristics of rice residue biochar and sorption/desorption pattern of biourea was investigated. Biochar yield was reduced with the increasing temperature accompanied with increasing carbon content, pH, and electrical conductivity. Elemental O:C and H:C ratios of biochar decreases with temperature. Half-life was predicted between 500 and 750 years varying positively with pyrolysis temperature. Urea sorption/ desorption studies revealed (>)90% sorption in both rice straw and husk biochar with highest urea adsorption at 450 degrees C, while desorption was more sustained in rice straw biourea. Microporosity, cation exchange capacity and functional groups primarily carboxyl and keto group, played key role in sorption/desorption pattern of biourea with slow release kinetics. Rice residue based biourea composites have potential to raise the crop yields and nitrogen use efficiency.
机译：生物质热解获得的生物炭有几种能量，环境和农业应用。在本研究中，研究了热解温度（300摄氏度，450℃和600℃）对水稻残留生物炭和生物藻吸附/解吸模式的影响。随着碳含量，pH和电导率的增加而伴随着伴随的温度，生物炭产率降低。元素O：C和H：C比率的BioChar比随温度降低。半衰期预测在500至750岁之间，随着热解温度而变化。尿素吸附/解吸研究显示（>）稻草和稻壳生物炭中的90％吸附，尿素吸附在450℃下，稻草生物稻草中的解吸更持续。微孔，阳离子交换能力和官能团主要是羧基和酮基团，在Biourea的吸附/解吸模式中发挥了关键作用，缓慢释放动力学。基于水稻基础的Biourea复合材料有可能提高作物产量和氮气使用效率。

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