化工学报2012，Vol.63Issue(3)：904-909,6.DOI:10.3969/j.issn.0438-1157.2012.03.032
化学链燃烧铁基载氧体还原反应积炭趋势
Carbon deposition during reduction in chemical-looping combustion with Fe-based oxygen carriers
摘要
Abstract
The iron-based oxygen carriers with A12O3 as an inert prepared by mechanical mixing were studied on thermal gravimetric analyzer (TGA). Through the thermograms reduced by CH4, it was found that there was severe carbon deposition which even caused the mass curve to increase during reduction process. The concentration of reducing gas had a strong effect on the reaction rate as well as the degree of carbon deposition. At the same mass loss, higher concentration of the gas fuel tends to lead higher reaction rate while less carbon deposition. In addition, as the newly-generated carbon can be oxidized when introduced O2, the amount of CO2 during oxidation process can be applied to compare the level of carbon formation. With the redox cycles increased, the reaction was almost stable while the formation of carbon had a slightly downward tendency. Through analysis of the products with carbon deposition by X-ray diffraction and scanning electron microscope, there was Fe3C generated and the other part of C existed on the carrier in the form of carbon filaments.关键词
化学链燃烧/机械混合法/铁基载氧体/积炭Key words
chemical-looping combustion/mechanical mixing/Fe-based carrier/carbon deposition分类
化学化工引用本文复制引用
玄伟伟,张建胜..化学链燃烧铁基载氧体还原反应积炭趋势[J].化工学报,2012,63(3):904-909,6.
