Biomass steam gasification in a free-fall reactor followed by the as-produced biogenous syngas upgrading over Ni/olivine and Ni/olivine+CaO in a countercurrent moving bed reactor was performed in this study. In the newly developed moving bed configuration, the tar in the syngas was steam reformed and simultaneously the syngas was methanated. As a preliminary part of this research, the influences of tar on syngas methanation at different temperatures and H₂O contents were studied as well in a fixed-bed reactor with toluene as a model tar compound. It was found that the carbon deposition behavior was greatly affected by the reaction conditions. During raw biogenous syngas upgrading over Ni/olivine in the countercurrent moving bed upgrading reactor, both CH₄-rich gas production and tar elimination with good resistance toward carbon deposition were achieved. With the introduction of CO₂ sorbent into the upgrading reactor further, CH₄/H₂ mixture was achieved.

中文翻译：

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生物替代天然气同时焦油重整和合成气甲烷化

在这项研究中，在自由落体反应器中进行了生物质蒸汽气化，然后在逆流移动床反应器中对生成的生物质合成气进行了Ni /橄榄石和Ni /橄榄石+ CaO的提质。在新开发的移动床配置中，将合成气中的焦油进行蒸汽重整，同时将合成气甲烷化。作为本研究的初步部分，在以甲苯为模型焦油化合物的固定床反应器中，研究了焦油在不同温度和H ₂ O含量下对合成气甲烷化的影响。发现碳沉积行为受到反应条件的极大影响。在逆流移动床升级反应器中通过镍/橄榄石进行原始生物合成气的升级过程中，两个CH ₄实现了富气生产和焦油消除，并具有良好的抗碳沉积性能。随着将CO ₂吸附剂进一步引入到升级反应器中，获得了CH ₄ / H ₂混合物。