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Biomass pyrolysis/gasification for product gas production: the overall investigation of parametric effects

机译：用于生产沼气的生物质热解/气化：参数效应的整体研究

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摘要

The conventional biomass pyrolysis/gasification process for production of medium heating value gas for industrial or civil applications faces two disadvantages, i.e. low gas productivity and the accompanying corrosion of downstream equipment caused by the high content of tar vapour contained in the gas phase. The objective of this paper is to overcome these disadvantages, and therefore, the effects of the operating parameters on biomass pyrolysis are investigated in a laboratory setup based on the principle of keeping the heating value of the gas almost unchanged. The studied parameters include reaction temperature, residence time of volatile phase in the reactor, physico-chemical pretreatment of biomass particles, heating rate of the external heating furnace and improvement of the heat and mass transfer ability of the pyrolysis reactor. The running temperature of a separate cracking reactor and the geometrical configuration of the pyrolysis reactor are also studied. However, due to time limits, different types of catalysts are not used in this work to determine their positive influences on biomass pyrolysis behaviour. The results indicate that product gas production from biomass pyrolysis is sensitive to the operating parameters mentioned above, and the product gas heating value is high, up to 13-15 MJ/Nm~3.
机译：用于生产用于工业或民用的中等热值气体的常规生物质热解/气化工艺面临两个缺点，即，气体生产率低以及由气相中包含的高含量的焦油蒸气引起的下游设备的伴随腐蚀。本文的目的是克服这些缺点，因此，基于保持气体热值几乎不变的原理，在实验室设置中研究了操作参数对生物质热解的影响。研究的参数包括反应温度，挥发性相在反应器中的停留时间，生物质颗粒的物理化学预处理，外部加热炉的加热速率以及热解反应器的传热传质能力的提高。还研究了单独裂化反应器的运行温度和热解反应器的几何构型。但是，由于时间限制，这项工作没有使用不同类型的催化剂来确定它们对生物质热解行为的积极影响。结果表明，生物质热解产生的产气对上述运行参数敏感，产气热值高，高达13-15 MJ / Nm〜3。

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