LIU Mengmeng, ZHAN Zhiliang, SHAO Zhijiang, et al. Dynamic simulation of grade transition for ethylene slurry polymerization process based on simultaneous approach[J]. CIESC Journal, 2012, (9): 2703-2709.
LIU Mengmeng, ZHAN Zhiliang, SHAO Zhijiang, et al. Dynamic simulation of grade transition for ethylene slurry polymerization process based on simultaneous approach[J]. CIESC Journal, 2012, (9): 2703-2709.DOI: 10.3969/j.issn.0438-1157.2012.09.005.
Dynamic rigorous model including kinetics and thermodynamics is established for the ethylene slurry polymerization plant.Thermodynamic properties are estimated by Kriging technique with the maximum relative error less than 2%.Based on the equation oriented model
control and state variables are synchronously discretized using orthogonal collocation finite elements(OCFE) method to develop simultaneous dynamic simulation for grade transition operations.The results are validated by comparing steady state data of five different grades obtained by Aspen Plus.The dynamic grade transition based on average molecular weight is also presented