FeO/CaO 基化学链过程用于生物质转化的研究进展。
Insight into the FeO/CaO-based chemical looping process for biomass conversion.
机构信息
NUS Environmental Research Institute (NERI), National University of Singapore, Singapore 138602, Singapore.
Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore 117585, Singapore.
出版信息
Bioresour Technol. 2020 Aug;310:123384. doi: 10.1016/j.biortech.2020.123384. Epub 2020 Apr 18.
In this study, the looping materials of FeO, CaO, mechanically mixed CaO and FeO, and chemically synthesized CaFeO were tested for comparison of the performance and gas evolution processes. The reaction mechanism was illustrated to have an insight into the FeO/CaO-based chemical looping process. Results found that the reduction from FeO to FeO trended to form CO while the transition of FeO to Fe happened after 650 °C was most likely to release CO. CO adsorption by CaO during 400-600 °C and further desorbed at higher temperature for CO Boudouard reaction which enhanced the biomass conversion. Mechanically mixed CaO and FeO maintained the properties of CaO and FeO with CO transfer and oxygen releasing during chemical looping reaction process, while the synthesized CaFeO presented hard reducibility which prefer to generate CO with the highest concentration (34.96 vol%) during chemical looping process at 850 °C.
在这项研究中，对 FeO、CaO、机械混合的 CaO 和 FeO 以及化学合成的 CaFeO 这几种循环材料进行了测试，以比较它们的性能和气体释放过程。为了深入了解 FeO/CaO 基化学循环过程，本文阐述了反应机理。结果表明，FeO 还原为 FeO 的趋势是形成 CO，而在 650°C 后，FeO 向 Fe 的转变很可能释放 CO。在 400-600°C 期间，CaO 吸附 CO，并在更高温度下进一步解吸以进行 CO 的 Boudouard 反应，从而提高生物质转化率。机械混合的 CaO 和 FeO 在化学循环反应过程中保持了 CaO 和 FeO 的性质，并进行 CO 的传递和氧气的释放，而合成的 CaFeO 则表现出较强的还原性，在 850°C 的化学循环过程中，生成的 CO 浓度最高（34.96%体积）。
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