PT Journal AU Götz, M Lefebvre, J Mörs, F Ortloff, F Reimert, R Bajohr, S Kolb, T TI Novel gas holdup correlation for slurry bubble column reactors operated in the homogeneous regime SO The chemical engineering journal PY 2017 BP 1209 EP 1224 VL 308 DI 10.1016/j.cej.2016.09.101 LA english ER