Kwangseok Choi K. T. Moon J. H. Chung Xiaotao T. Bi J. R. Grace Electrostatic hazards of polypropylene powders in the fluidized bed reactor. 995-999 2011 IEEM https://doi.org/10.1109/IEEM.2011.6118065 conf/ieem/2011 db/conf/ieem/ieem2011.html#ChoiMCBG11