Experimental Validation of a Coupled Solid- and Gas-Phase Model for Combustion and Gasification of Wood Logs

2006 ◽  
Vol 20 (5) ◽  
pp. 2223-2232 ◽  
Author(s):  
Antonio Galgano ◽  
Colomba Di Blasi ◽  
Andrej Horvat ◽  
Yehuda Sinai
Keyword(s):  
Gas Phase ◽  
Experimental Validation ◽  
Phase Model

Structure and Reactivity of Al−O(H)−Al Moieties in Siloxide Frameworks: Solution and Gas-Phase Model Studies

2018 ◽  
Vol 58 (3) ◽  
pp. 902-906 ◽  
Author(s):  
Kapil Shyam Lokare ◽  
Beatrice Braun-Cula ◽  
Christian Limberg ◽  
Marcel Jorewitz ◽  
John T. Kelly ◽  
...  
Keyword(s):  
Gas Phase ◽  
Phase Model ◽  
Model Studies

Unifying the microscopic picture of His-containing turns: from gas phase model peptides to crystallized proteins

2017 ◽  
Vol 19 (26) ◽  
pp. 17128-17142 ◽  
Author(s):  
Woon Yong Sohn ◽  
Sana Habka ◽  
Eric Gloaguen ◽  
Michel Mons
Keyword(s):  
Gas Phase ◽  
Main Chain ◽  
Protein Structures ◽  
Phase Model ◽  
Side Chain ◽  
Central Position ◽  
Microscopic Picture ◽  
Model Peptides

The presence in crystallized proteins of a local anchoring between the side chain of a His residue, located in the central position of a γ- or β-turn, and its local main chain environment, is assessed by the comparison of protein structures with relevant isolated model peptides.

Unravelling the impact of hydrocarbon structure on the fumarate addition mechanism – a gas-phaseab initiostudy

2015 ◽  
Vol 17 (6) ◽  
pp. 4054-4066 ◽  
Author(s):  
Vivek S. Bharadwaj ◽  
Shubham Vyas ◽  
Stephanie M. Villano ◽  
C. Mark Maupin ◽  
Anthony M. Dean
Keyword(s):  
Gas Phase ◽  
Phase Model ◽  
Hydrocarbon Biodegradation ◽  
Fumarate Addition ◽  
The Impact

The fumarate addition mechanism for hydrocarbon biodegradation. Model aromatic and aliphatic fuel degradation is comparedviaa reduced gas-phase model.

scholarly journals Comparative simulation study of gas-phase propylene polymerization in fluidized bed reactors using aspen polymers and two phase models

2013 ◽  
Vol 19 (1) ◽  
pp. 13-24 ◽  
Author(s):  
Ahmad Shamiria ◽  
M.A. Hussaina ◽  
Farouq Mjallic ◽  
Navid Mostoufid
Keyword(s):  
Molecular Weight ◽  
Gas Phase ◽  
Production Rate ◽  
Fluidized Bed ◽  
Average Molecular Weight ◽  
Phase Model ◽  
Propylene Polymerization ◽  
Flow Index ◽  
Fluidized Bed Reactors ◽  
Two Phase

A comparative study describing gas-phase propylene polymerization in fluidized-bed reactors using Ziegler-Natta catalyst is presented. The reactor behavior was explained using a two-phase model (which is based on principles of fluidization) as well as simulation using the Aspen Polymers process simulator. The two-phase reactor model accounts for the emulsion and bubble phases which contain different portions of catalysts with the polymerization occurring in both phases. Both models predict production rate, molecular weight, polydispersity index (PDI) and melt flow index (MFI) of the polymer. We used both models to investigate the effect of important polymerization parameters, namely catalyst feed rate and hydrogen concentration, on the product polypropylene properties, such as production rate, molecular weight, PDI and MFI. Both the two-phase model and Aspen Polymers simulator showed good agreement in terms of production rate. However, the models differed in their predictions for weight-average molecular weight, PDI and MFI. Based on these results, we propose incorporating the missing hydrodynamic effects into Aspen Polymers to provide a more realistic understanding of the phenomena encountered in fluidized bed reactors for polyolefin production.

Gas Phase Model Systems for Catalysis

2019 ◽  
Vol 233 (6) ◽  
pp. 755-758
Author(s):  
Sandra M. Lang
Keyword(s):  
Gas Phase ◽  
Model Systems ◽  
Phase Model

Modified two-phase model with hybrid control for gas phase propylene copolymerization in fluidized bed reactors

2015 ◽  
Vol 264 ◽  
pp. 706-719 ◽  
Author(s):  
Ahmad Shamiri ◽  
Suk Wei Wong ◽  
Mohd Fauzi Zanil ◽  
Mohamed Azlan Hussain ◽  
Navid Mostoufi
Keyword(s):  
Gas Phase ◽  
Fluidized Bed ◽  
Hybrid Control ◽  
Phase Model ◽  
Fluidized Bed Reactors ◽  
Two Phase
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