School of Chemistry and Chemical Engineering , Queen's University Belfast , Belfast , BT7 1NN , U.K.
School of Engineering and Computer Science , University of Hull , Hull , HU6 7RX , U.K.
Environ Sci Technol. 2019 Aug 6;53(15):9298-9305. doi: 10.1021/acs.est.9b01527. Epub 2019 Jul 11.
Biomass gasification is regarded as a promising alternative to fossil fuels for producing sustainable and clean value-added products. However, the challenges including low energy efficiency, CO emission, and ash agglomeration significantly delay the deployment of the technology. Herein, we first proposed a novel autothermal CaO looping biomass gasification (Auto-CaL-Gas) technology, in which CaO-based materials react with flue gas with a high concentration of CO (>30 vol %) to produce heat inside the gasifier, simultaneously providing energy for low-temperature biomass gasification using CO as a gasification agent. Upon use of this concept the syngas production exhibited a significant increase from 0.21 kg/h to 0.90 kg/h in the Aspen simulation results and more than 3-fold improvement in the experimental results.
生物质气化被认为是替代化石燃料生产可持续和清洁附加值产品的有前途的方法。然而，包括低能源效率、CO 排放和灰分团聚在内的挑战极大地延迟了该技术的部署。在此，我们首次提出了一种新颖的自热 CaO 循环生物质气化（Auto-CaL-Gas）技术，其中基于 CaO 的材料与具有高浓度 CO（>30 体积%）的烟道气反应，在气化炉内产生热量，同时利用 CO 作为气化剂为低温生物质气化提供能量。使用该概念后，在 Aspen 模拟结果中，合成气的产量从 0.21 kg/h 显著增加到 0.90 kg/h，在实验结果中提高了 3 倍以上。
