Zobrazeno 1 - 10
of 64
pro vyhledávání: '"Günter Weickert"'
Publikováno v:
CHIMIA, Vol 55, Iss 3 (2001)
In classical experimental research work on catalytic olefin polymerization, kinetics and powder properties are always determined as an average value over a large number of polymer particles. When studying the properties of the polymer, the powder has
Externí odkaz:
https://doaj.org/article/a976e44aea88496c89f74935a1f0690f
Publikováno v:
Macromolecular Reaction Engineering. 4:95-108
This work focuses on the heat exchange between a polymer particle and the reactor wall for low gas velocities. The role of different wall materials (or heat transfer conditions) is investigated with an eye to understanding how this influences the lik
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::37ecbe4f0606d70d76290722337738df
https://doi.org/10.1002/mren.200900028
https://doi.org/10.1002/mren.200900028
Publikováno v:
Macromolecular Reaction Engineering. 3:433-447
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1839901b73e5c8f92af38aac853bd585
https://doi.org/10.1002/mren.200900019
https://doi.org/10.1002/mren.200900019
Publikováno v:
Macromolecular Reaction Engineering
Macromolecular Reaction Engineering, Wiley-VCH Verlag, 2007, 1 (3), pp.338--352
Macromolecular Reaction Engineering, 1(3-5), 338-352. Wiley-VCH Verlag
Macromolecular Reaction Engineering, Wiley-VCH Verlag, 2007, 1 (3), pp.338--352
Macromolecular Reaction Engineering, 1(3-5), 338-352. Wiley-VCH Verlag
A multi-scale modelling approach is proposed as a means of eventually overcoming the limitations of the multigrain and polymer flow models of particle growth. It is demonstrated that there is a need to introduce some sort of macroheterogeneity into t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::70a7232a74b3ef5f7a404898ba3566a5
https://doi.org/10.1002/mren.200600036
https://doi.org/10.1002/mren.200600036
Publikováno v:
Chemical engineering and processing : process intensification, 46(6), 554-564. Elsevier
Chemical Engineering and Processing, 46(6), 554-564
Chemical Engineering and Processing, 46(6), 554-564
A modified generic model controller is developed and tested through a simulation study. The application involves model-based control of a propylene polymerization reactor in which the monomer conversion and melt index of the produced polymer are cont
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e4b7a802e2c92691d62fbc8934cff3df
https://doi.org/10.1016/j.cep.2006.07.012
https://doi.org/10.1016/j.cep.2006.07.012
Publikováno v:
Chemical engineering science, 62(9), 2522-2534. Elsevier
Chemical Engineering Science, 62(9), 2522-2534. Elsevier
Chemical Engineering Science, 62(9), 2522-2534. Elsevier
Square nosed slugging fluidization behavior in a circulating fluidized bed riser using a polyethylene powder with a very wide particle size distribution was studied. In square nosed slugging fluidization the extent of mixing of particles of different
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a2636aded36b145e5c5e9e3a2c7e72e4
https://research.tue.nl/en/publications/d08d574d-d0b0-4593-a934-ca07acd7919a
https://research.tue.nl/en/publications/d08d574d-d0b0-4593-a934-ca07acd7919a
Publikováno v:
Macromolecular rapid communications, 27(1), 15-20. Wiley Online Library
Macromolecular Rapid Communications, 27(1), 15-20. Wiley-VCH Verlag
Macromolecular Rapid Communications, 27(1), 15-20. Wiley-VCH Verlag
A morphological investigation was carried out on different Ziegler-Natta catalysts during the early stages of propylene homo- and propylene-ethylene copolymerization. For similar polymerization conditions, but dependent on the nature of the catalysts
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c547ab954d5e5c8bfe97b636897f68a0
https://doi.org/10.1002/marc.200500664
https://doi.org/10.1002/marc.200500664
Autor:
Michiel F. Bergstra, Günter Weickert
Publikováno v:
Chemical engineering science, 61(15), 4909-4918. Elsevier
A multi-purpose setup is presented for homo- and co-polymerizations of ethylene and 1-hexene in slurry and gas phase. Polymerization experiments have been executed semi-batch with a heterogeneous metallocene catalyst under industrial conditions. Duri
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5d96f500b00fe5327b49504eac275081
https://doi.org/10.1016/j.ces.2006.03.024
https://doi.org/10.1016/j.ces.2006.03.024
Publikováno v:
Macromolecular Rapid Communications, 26(14), 1155-1158. Wiley-VCH Verlag
Summary: True initial polymerization rates can be calculated from the adiabatic temperature rise under isoperibolic conditions. They are much higher than initial polymerization rates measured by standard mass flow meter methods under quasi-steady-sta
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f83461b4502b1e5cfad4419825af0a39
https://doi.org/10.1002/marc.200500144
https://doi.org/10.1002/marc.200500144
Autor:
Michiel Bergstra, Günter Weickert
Publikováno v:
Macromolecular Materials and Engineering. 290:610-620
Ethylene homopolymerizations were executed with a supported Ind2ZrCl2/MAO catalyst using the so-called Reactive Bed Preparation method. This RBP method combined a slurry polymerization with a gas phase polymerization with the same polymerizing partic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::96a95fb6d5650ba7d48fa58a27874b3e
https://doi.org/10.1002/mame.200500085
https://doi.org/10.1002/mame.200500085