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首页> 外文期刊>Waste and biomass valorization >Batch Pyrolysis of Acid-Treated Rice Straw and Potential Products for Energy and Biofuel Production
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Batch Pyrolysis of Acid-Treated Rice Straw and Potential Products for Energy and Biofuel Production

机译：酸处理稻草及其潜在产品的间歇热解，用于生产能源和生物燃料

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Purpose Rice straw is an abundant but largely unutilized biomass. If rice straw's ash content could be reduced by pretreatment, it could be pyrolyzed into energy-dense, soil-enriching products. This paper investigates if acid-pre-treatment of rice straw before pyrolysis could improve the char, bio-oil or gas products of pyrolysis. Methods Rice straw was sonicated in a 5 % HCl by volume bath, and the acid-treated straw was slowly pyrolyzed in batches at 500 ℃. Its products were compared with those of untreated rice straw. Results FTIR analysis showed that both oils were mixtures of alkanes, alkenes, alcohols and aromatics. Less bio-oil was produced after acid pretreatment. After acid pretreatment, the char decreased in ash percentage, increased in acidity and increased in heating value. The gas was rich in CO_2 but low in combustible gases like CO, CH_4 and H_2. Conclusion This pretreatment did not improve the pyrolysis char, bio-oil, or gas. However, water pretreatment has been reported to remove the alkali ash metals and might improve pyrolysis products. If rice straw is pyrolyzed, the bio-oil can be upgraded to refinery-grade crude oil and the char can improve soil nutrient quality, potentially helping rice farmers in the developing world.
机译：目的稻草是一种丰富但大部分未被利用的生物质。如果可以通过预处理降低稻草的灰分含量，则可以将其热解为能量密集的富土壤产品。本文研究了在热解之前对稻草进行酸预处理是否可以改善热解的炭，生物油或气体产物。方法用体积浴对稻草在5％HCl中进行超声处理，酸处理后的稻草在500℃下缓慢地热解。将其产品与未经处理的稻草进行比较。结果FTIR分析表明，两种油都是烷烃，烯烃，醇和芳烃的混合物。酸预处理后产生的生物油较少。酸预处理后，炭的灰分降低，酸度增加，热值增加。该气体富含CO_2，但可燃气体（如CO，CH_4和H_2）低。结论该预处理不能改善热解炭，生物油或气体。然而，据报道水预处理可去除碱金属灰分，并可能改善热解产物。如果将稻草进行热解，则可以将生物油升级为炼厂级原油，并且炭可以改善土壤养分质量，从而有可能帮助发展中国家的稻农。

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