Abstract Bio-oil, a promising candidate to replace fossil fuels, has received considerable attention for its sustainability, resource diversity and environmental benefits. Industrial production of bio-oil is urgently needed. In this study, a downdraft circulating fluidized bed reactor commercial-scale fast pyrolysis plant with biomass throughput of 1–3 t h− 1 is studied. Rice husk was processed at a fast pyrolysis temperature of 550 °C to evaluate the plant operation status. The system was continuously operated for 80.42 h. The thermal properties of the feedstock (rice husk), dust (separated from feedstock), char and heat carrier were analyzed and the bio-oil properties such as water content, pyrolytic water content, viscosity, density, pH, heating value, solid content and ash content were analyzed and presented. All the tested properties of the bio-oil meets the pyrolysis liquid biofuels standards in ASTM D7544-12 for Grade G biofuels, except for the water content of the bio-oil, which is slightly higher than that of Grade G biofuels. In energy balance analysis, the potential recovered energy of the three main products was 8.0 ± 1.1, 2.1 ± 0.1 and 5.3 ± 0.7 MJ kg− 1 for bio-oil, char and non-condensable gas, respectively, which shows that the largest portion of the energy in biomass was recovered in the bio-oil.

中文翻译：

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在具有下吸式循环流化床反应器的商业规模工厂中通过稻壳快速热解生产生物油

摘要 生物油是一种很有前景的替代化石燃料的候选物，因其可持续性、资源多样性和环境效益而受到广泛关注。迫切需要生物油的工业化生产。在本研究中，研究了生物质吞吐量为 1-3 t h- 1 的下吸式循环流化床反应器商业规模快速热解装置。稻壳在 550 °C 的快速热解温度下进行处理，以评估工厂的运行状态。系统连续运行80.42小时。分析了原料（稻壳）、粉尘（与原料分离）、焦炭和热载体的热特性，以及生物油的含水量、热解水含量、粘度、密度、pH值、热值、固体含量等特性。和灰分含量进行了分析和呈现。除了生物油的含水量略高于G级生物燃料外，生物油的所有测试性能均符合ASTM D7544-12中G级生物燃料的热解液体生物燃料标准。在能量平衡分析中，三种主要产品的潜在回收能量分别为生物油、焦炭和不凝气的 8.0 ± 1.1、2.1 ± 0.1 和 5.3 ± 0.7 MJ kg− 1，这表明最大部分生物质中的能量在生物油中被回收。