College of Mechanical and Electronic Engineering, Shandong University of Science and Technology, 266590, Qingdao, Shandong Province, China.
College of Mechanical and Electronic Engineering, Shandong University of Science and Technology, 266590, Qingdao, Shandong Province, China.
Sci Total Environ. 2019 Mar 20;657:1357-1367. doi: 10.1016/j.scitotenv.2018.12.097. Epub 2018 Dec 12.
Microwave-assisted methane reforming with carbon dioxide was dealt with in this work, using a Fe-rich biomass-derived char by one-step preparation. The main factors on the reforming reaction and stability of this catalyst were evaluated, together with a series of characterization on the produced gas and the used char. The char obtained from biomass pyrolysis with FeO addition of 10% exhibited the best performance on dry reforming reaction. A target CH conversion of 95% over this char was realized at 800 °C. Moreover, H/CO ratio achieved with this char was prone to approach the stoichiometric value. Compared to CO conversion, CH conversion was more promoted with the increase of CO/CH ratio. The variation of CO/CH ratio also leaded to a noticeable changes on H/CO ratio. More importantly, the selected char presented a satisfied stability, evidenced by the total decrease of 4.8% for CH conversion and 3.1% for CO conversion in the test of 160 min. This was contributed to a depressed in-situ carbon consumption and a moderate deterioration of porous structure. Gaseous products obtained with the appropriate char in a long run had a syngas content of 88.79% and H/CO ratio of 0.92 on average.
本工作采用一步法制备的富铁生物质衍生炭对焦炭进行微波辅助二氧化碳甲烷重整反应。评价了主要因素对重整反应和催化剂稳定性的影响，并对生成气和使用过的炭进行了一系列的表征。在 FeO 添加量为 10%的生物质热解过程中得到的炭在干重整反应中表现出最好的性能。在 800°C 下，该炭的 CH 转化率达到 95%。此外，用该炭实现的 H/CO 比接近化学计量值。与 CO 转化率相比，CH 转化率随着 CO/CH 比值的增加而增加。CO/CH 比值的变化也导致 H/CO 比值发生明显变化。更重要的是，所选炭表现出良好的稳定性，在 160 分钟的测试中，CH 转化率总降低了 4.8%，CO 转化率总降低了 3.1%。这归因于原位碳消耗的抑制和多孔结构的适度恶化。在较长时间内，适当的炭可获得具有 88.79%合成气含量和平均 H/CO 比为 0.92 的气体产物。
