Korean J. Chem. Eng., 28(1), 314 (2011) SHORT COMMUNICATION Retraction: “Research on the main factors for changes in pressure based on turbulent circulating fluidized bed coal gasification technology” [Korean J. Chem. Eng., 27(6), 1707 (2010)] Duan Feng*,**,†, Jin Bao-Sheng*,†, Huang Ya-Ji*, Li Bin*, Sun Yu*, Wu Yiming*, and Zhang Ming-Yao* *Thermoenergy Engineering Research Institute, Southeast University, Nanjing 210096, Jiangsu Province, China **School of Metallurgy and Resource, Anhui University of Technology, Maanshan 243002, Anhui Province, China The corresponding authors submitted a withdrawal email of the above article at the end of November 2010 because authors needed to do more study in validation of the coal/air ratio and coal/steam ratio. It was also found that there was something wrong in the description of Fig. 7 and Fig. 8. The corresponding authors deeply regrets the uncareful publication. To whom correspondence should be addressed. E-mail: ddffeng@126.com † 314