Tar reforming using char as catalyst during pyrolysis and gasification of Shengli brown coal
MetadataShow full item record
Coal chars were employed to catalyze the in situ tar reforming reactions during the pyrolysis and gasification of Shengli brown coal in a two-stage quartz reactor at different temperatures. Two different chars as catalysts were prepared. One (inactivated char) was prepared from decomposing brown coal in inert atmosphere while the other one (activated char) was obtained with additional 10 min steam activation. It was found that the activated char as catalyst has shown a much better catalytic performance for tar reduction than the inactivated char, especially for the tars from the gasification conditions. The catalytic reforming reactions could also cause the increase in the proportion of large aromatic rings in tars, whereas the presence of steam in the reaction zone could see the decrease of large aromatic rings in tars. The catalysts were characterized by SEM, EDX, BET, XRD and Raman, indicating that the high activity of activated char should be mainly attributed to its amorphous carbon structure, large surface area and abundant metal species (e.g. Na, K, Ca and Mg) on its surface. © 2013 Elsevier B.V. All rights reserved.
Showing items related by title, author, creator and subject.
Wang, Y.; Sun, J.; Zhang, H.; Chen, Z.; Lin, X.; Zhang, Shu; Gong, W.; Fan, M. (2015)© 2015 American Chemical Society. The purpose of this study was to demonstrate the effectiveness of in situ gas conversion using char as a catalyst/catalyst support in the gasification of Shengli brown coal in an ...
An advanced biomass gasification technology with integrated catalytic hot gas cleaning. Part II: Tar reforming using char as a catalyst or as a catalyst supportZhang, Shu; Asadullah, Mohammad; Dong, Li; Tay, Hui-Ling; Li, Chun-Zhu (2013)This paper aims to demonstrate the effectiveness of tar reforming in a pilot gasifier using char as a catalyst or as a catalyst support in our advanced biomass gasification system with integrated catalytic hot gas cleaning ...
In situ catalyzed Boudouard reaction of coal char for solid oxide-based carbon fuel cells with improved performanceJiao, Y.; Tian, W.; Chen, H.; Shi, H.; Yang, B.; Li, C.; Shao, Zongping; Zhu, Z.; Li, S. (2015)© 2014 Elsevier Ltd. The use of industrial coal char as a fuel source for an anode-supported solid oxide-based carbon fuel cell (SO-CFC) with a yttrium-stabilized zirconia electrolyte and La0.8Sr0.2MnO3 cathode was ...