A New Model for the Calculation of Height Equivalent to Theoretical Plate in High Pressure Columns Equipped with Structured Packing foriC4/nC4 Separation

2011 ◽  
Vol 50 (11) ◽  
pp. 6886-6897 ◽  
Author(s):  
Mohmmad Reza Rahimpour ◽  
Hossein Momeni ◽  
Khadijeh Paymooni ◽  
Ali Kiani
Keyword(s):  
High Pressure ◽  
Theoretical Plate ◽  
Structured Packing ◽  
New Model

A New Model for Describing the Adsorption of Asphaltenes on Porous Media at a High Pressure and Temperature under Flow Conditions

2015 ◽  
Vol 29 (7) ◽  
pp. 4210-4221 ◽  
Author(s):  
Nashaat N. Nassar ◽  
Tatiana Montoya ◽  
Camilo A. Franco ◽  
Farid B. Cortés ◽  
Pedro Pereira-Almao
Keyword(s):  
High Pressure ◽  
Porous Media ◽  
Flow Conditions ◽  
High Pressure And Temperature ◽  
New Model

A Film-Theory-Based Model for a Multicomponent Droplet Evaporation at Both Low- and High-Pressure Environments

2005 ◽  
Vol 128 (3) ◽  
pp. 290-294 ◽  
Author(s):  
Guangfa Yao
Keyword(s):  
Mass Transfer ◽  
High Pressure ◽  
Heat And Mass Transfer ◽  
Film Theory ◽  
Droplet Evaporation ◽  
Published Data ◽  
Real Gas ◽  
New Model ◽  
The Real ◽  
Transfer Equations

Modeling of a multicomponent droplet evaporation is investigated based on the film theory in both low- and high-pressure environments. Unlike the classical film theory, effects of blowing due to evaporation on gas-side heat and mass transfer are included through the film thicknesses. The corresponding gas-side heat and mass transfer equations are derived in terms of film thicknesses. In a high-pressure situation, the real gas behavior is considered. Based on the derived equations, a new model for multicomponent droplet evaporation is formulated and validated against the published data.

A new model for volume fraction measurements of horizontal high-pressure wet gas flow using gamma-based techniques

2018 ◽  
Vol 96 ◽  
pp. 311-320 ◽  
Author(s):  
Yanzhi Pan ◽  
Yugao Ma ◽  
Shanfang Huang ◽  
Pengman Niu ◽  
Dong Wang ◽  
...  
Keyword(s):  
High Pressure ◽  
Gas Flow ◽  
Volume Fraction ◽  
New Model ◽  
Wet Gas

Improvement of Complete Circulation of Aqueous Solution for Urea Production Processing with Premixing

2014 ◽  
Vol 618 ◽  
pp. 252-256
Author(s):  
Xiao Di Liu ◽  
Yu Le Zhu ◽  
Xue Ying Gu
Keyword(s):  
Aqueous Solution ◽  
High Pressure ◽  
Conversion Rate ◽  
Experimental Results ◽  
Solution Processing ◽  
Urea Synthesis ◽  
New Model ◽  
Urea Production ◽  
Tower Structure ◽  
Modeling Prediction

Half of the urea is produced by complete circulation of aqueous solution processing in China. The mixing between the gas and liquid is the key of the technology. This paper presents an improvement of the complete circulation of aqueous solution processing by premixing and atomizing liquid NH3 and Methylamine. And a novel atomizer was developed for the high pressure and limited space. We proposed a new model based on the two innovations and predicted the performance of the suggested processing. The modeling prediction agreed well with the experimental results. For the same urea synthesis tower structure, the conversion rate increased 3~5%. This indicates this technology is competitive to retrofit the existed units.

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