As a renewable fuel, the application of biomass fuel gets more and more attention. Fire and explosion are the main safety problems in the biomass fuel storage process. The characteristic parameters and kinetic analysis of pyrolysis and combustion are significant to guide the safe storage of biomass fuel. In this work, the thermogravimetric analysis (TGA) was used to obtain the pyrolysis and combustion characteristics of corn straw powder, poplar wood chip and rice husk in nitrogen and air, respectively. The Thermogravimetry-Differential Thermogravimetric (TG-DTG) profile shows that the pyrolysis process of these biomass includes three stages of drying, pyrolysis and carbonization, while the combustion process includes three stages of drying, devolatilization and coke combustion. The main reaction stage of biomass pyrolysis and combustion are roughly between 170∼400 °C and 180∼530 °C, respectively. With the increase of the heating rate, TG and DTG profiles shifts to the high temperature side. Furthermore, the kinetic analysis was performed by using Kissinger-Akahira-Sunose (KAS), Flynn-Wall-Ozawa (FWO), Friedman, and Coats-Redfern (CR) methods, based on the thermogravimetric experimental data. The activation energy of biomass pyrolysis is shown to be between 70∼100 kJ/mol. For the activation energy of biomass combustion, the calculated value from isoconversional methods is between 140∼180 kJ/mol. The calculated value from CR method is between 80∼150 kJ/mol, and the activation energy of the coke combustion stage is greater than that of the devolatilization stage. Finally, the auto-ignition experiment of biomass particles was designed and conducted, indicating that the corn straw powder is more prone to spontaneous combustion, followed by rice husk and poplar wood chip, which corresponds to the results of activation energy. And the fire hazard of the biomass particles was analyzed according to the characteristic parameters. This work provides fundamental data to promote the development of storage techniques and facilitate the safe production of biomass particles.

作为可再生燃料，生物质燃料的应用越来越受到重视。火灾和爆炸是生物质燃料存储过程中的主要安全问题。热解和燃烧的特征参数和动力学分析对指导生物质燃料的安全储存具有重要意义。在这项工作中，使用热重分析（TGA）分别获得了玉米秸秆粉，杨木屑和稻壳在氮气和空气中的热解和燃烧特性。热重-差示热重（TG-DTG）曲线表明，这些生物质的热解过程包括干燥，热解和碳化的三个阶段，而燃烧过程包括干燥，脱挥发分和焦炭燃烧的三个阶段。生物质热解和燃烧的主要反应阶段分别在170〜400℃和180〜530℃之间。随着加热速率的增加，TG和DTG曲线移向高温侧。此外，基于热重实验数据，通过使用Kissinger-Akahira-Sunose（KAS），Flynn-Wall-Ozawa（FWO），Friedman和Coats-Redfern（CR）方法进行动力学分析。生物质热解的活化能显示在70〜100 kJ / mol之间。对于生物质燃烧的活化能，等转化方法的计算值在140〜180 kJ / mol之间。CR法的计算值在80〜150kJ / mol之间，焦炭燃烧阶段的活化能大于脱挥发分阶段的活化能。最后，设计并进行了生物质颗粒的自燃实验，表明玉米秸秆粉更容易自燃，其次是稻壳和杨木屑，这与活化能的结果相对应。并根据特征参数对生物质颗粒的火灾隐患进行了分析。这项工作提供了基础数据，以促进存储技术的发展并促进生物质颗粒的安全生产。