Key Laboratory of Coal Clean Conversion & Chemical Engineering Process (Xinjiang Uyghur Autonomous Region), College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046, China.
State Key Laboratory of Fine Chemicals, Institute of Coal Chemical Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China.
Bioresour Technol. 2019 Jan;272:241-248. doi: 10.1016/j.biortech.2018.10.008. Epub 2018 Oct 5.
Catalytic steam gasification of biomass has been carried out in decoupled triple bed gasification (DTBG) system which consists of pyrolyzer, reformer and combustor. Olivine and NiO/olivine used as in-situ tar destruction catalyst. The result shows the gasification system with catalytic bed materials allows an option to improve tar removal that enhances H production. A gas yield of 1.59 Nm/kg daf with H concentration of 56.1 vol% and tar content as low as 0.6 g/Nm has been achieved with the presence of NiO/olivine. Olivine and NiO/olivine reduced tar yield by 55% and 94% respectively compared to quartz. Gas yield, tar removal efficiency and water conversion enhanced by higher reformer temperature. The longer residences time of catalyst in reformer leads in-situ reduction of olivine and NiO/olivine that adds up in-situ tar reforming. Particularly, in-situ reduction of NiO to metallic Ni enhances tar and CH reforming reaction.
生物质的催化蒸汽气化已在由热解器、重整器和燃烧室组成的解耦三床气化（DTBG）系统中进行。橄榄石和 NiO/橄榄石用作原位焦油破坏催化剂。结果表明，具有催化床材料的气化系统允许选择提高焦油去除率，从而提高 H 产量。在 NiO/橄榄石的存在下，实现了 1.59 Nm/kg daf 的产气率，H 浓度为 56.1 vol%，焦油含量低至 0.6 g/Nm。与石英相比，橄榄石和 NiO/橄榄石分别将焦油产率降低了 55%和 94%。较高的重整器温度提高了气体产率、焦油去除效率和水转化率。催化剂在重整器中的停留时间延长导致橄榄石和 NiO/橄榄石的原位还原，从而增加了原位焦油重整。特别是，NiO 的原位还原为 Ni 增强了焦油和 CH 重整反应。
