文献类型：会议论文

英文题名：Modeling on scale-up of an ebullated-bed reactor for the hydroprocessing of vacuum residuum

作者：Cheng, Zhen-Min[1];Huang, Zi-Bin[1];Yang, Tao[2];Liu, Jian-Kun[2];Ge, Hai-Long[2];Jiang, Li-Jing[2];Fang, Xiang-Chen[2]

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Fushun Res Inst Petr & Petrochem, Fushun 113001, Liaoning, Peoples R China

会议论文集：International Symposium on Advances in Hydroprocessing of Oil Fractions (ISAHOF)

会议日期：JUN 09-14, 2013

会议地点：Acapulco, MEXICO

语种：英文

外文关键词：Ebullated-bed reactor; Axial dispersion model; Two-bubble class model; Slurry bed; Hydroprocessing of vacuum residuum

摘要：An ebullated reactor for heavy vacuum residuum (VR) hydroprocessing under a high hydrogen pressure of 15 MPa and a high temperature of 425 degrees C was simulated using a two-bubble class model. To account for the influence of the strong back-mixing of the liquid phase and the non-uniform distribution of the catalyst on the performance of the reactor, axial dispersions for the two phases are incorporated into the plug flow model. Based on the bench-scale experiments conducted in a reactor of 0.036 m ID and 2.0 m in height, scaling up of the reactor to an annual processing capacity of 1.0 million t of VR was proposed. To determine the optimal reactor dimension, a reactor of 3 m ID and 36.86 m in height and one with 4.5 m ID and 16.38 m in height are compared. It shows although the two reactors give very similar conversions as a CSTR reactor, the 3 m ID reactor shows a higher gas-liquid mass transfer coefficient and a larger slurry circulation velocity than the 4.5 m ID one, which suggests the 3 m ID reactor is a better choice in the scale (C) 2013 Elsevier B.V. All rights reserved.