Propane Dehydrogenation in a Modified Porous Membrane Reactor for Producing Propylene with Chemical and Polymer Grades

2005 ◽  
Vol 5 (2) ◽  
pp. 176
Author(s):  
Azis Trianto ◽  
Yazid Bindar ◽  
Noezran Noezran
Keyword(s):  
Membrane Reactor ◽  
Porous Membrane ◽  
Inert Gas ◽  
Propane Dehydrogenation ◽  
Process Flow ◽  
Gas Concentration ◽  
Simultaneous Production ◽  
Study Results ◽  
Propylene Production ◽  
Side Outlet

Propane dehydrogenation is a promising route for producing propylene to replace traditional cracking methods. A membrane reactor offers a possibility to produce not only chemical grade but also polymer grade of propylene. The purpose of the present study is to evaluate the performance of a Modified Porous Membrane Reactor (MPMR) in producing these two propylene grades simultaneously. The study involves evaluations based on thermodynamics and process flow sheeting. The performance of this reactor is compared to that of conventional reactor. At first, the thermodynamics is conducted using minimum Gibb's Energy approach. Then the process flow sheeting evaluation is built using the HYSYS simulator. The effect of inert gas (steam) concentration in both sweep and feed sides is investigated. The thermodynamics study results optimum temperature and inert gas concentration to obtain these two grades of propylene simultaneously. The propylene with polymer grade above 99% is produced from the sweep side outlet. The propylene with chemical grade is produced from the feed side outlet. The simultaneous production of these two grades of propylene has benefit in vanishing propane-propylene splitter. Keywords: Membrane reactor, porous membrane, propane dehydrogenation, propylene production, and process simulation.

Propane Dehydrogenation Technology; A Viable Alternative to Meet Nigeria's Growing Propylene Demand

2021 ◽  
Author(s):  
Solomon Ichado
Keyword(s):  
Petrochemical Industry ◽  
West African ◽  
Propane Dehydrogenation ◽  
Market Size ◽  
The West ◽  
Operation Process ◽  
Major Player ◽  
Global Demand ◽  
Import And Export ◽  
Propylene Production

Abstract Global propylene demand increases year on year, conventional sources of propylene production like steam crackers, refinery fluid catalytic cracker (FCC) are unable to meet global demand for propylene and this has necessitated the use of "On-Purpose" sources for propylene production like propane dehydrogenation (PDH). The PDH and its impact in the propylene mix of the Nigerian petrochemical industry is what this work is centered on. The need for PDH technology in Nigeria stems from the reality that, Nigeria currently has no refinery with operational fluid catalytic cracker nor sufficient steam crackers to meet an estimated propylene demand gap of about 140 KTA (2016/2017) despite propylene production from a major player in Nigeria (at present, demand gap is expected to be more). This work involves analysis of Nigeria's petrochemical import and export, petrochemical market size, exposition to the PDH trendand technology focusing on UOP Oleflex technology (chemistry and operation/process flow) and how this technology can help close the current propylene demand gap in Nigeria especially as Nigeria enters its decade of gas. Petrochemical companies in Asia have been able to use this PDH technology to manufacture propylene thereby significantly closing the propylene demand gap, constructing the most PDH plants in the last 5 years in the process. This also can be replicated in Nigeria and aid in closing propylene demand gap, and with surplus, begin to export propylene to the West African market to generate revenue, improving GDP.

scholarly journals Modeling of ethylbenzene dehydrogenation in catalytic membrane reactor with porous membrane

2014 ◽  
Vol 2 (1) ◽  
pp. 1-9 ◽  
Author(s):  
E.V. Shelepova ◽  
A.A. Vedyagin ◽  
I.V. Mishakov ◽  
A.S. Noskov
Keyword(s):  
Mathematical Model ◽  
Membrane Reactor ◽  
Ceramic Membrane ◽  
Porous Ceramic ◽  
Porous Membrane ◽  
Membrane Reactors ◽  
Catalytic Membrane ◽  
Catalytic Membrane Reactor ◽  
Membrane Pore ◽  
Ethylbenzene Dehydrogenation

AbstractThe modeling of ethylbenzene dehydrogenation in a catalytic membrane reactor has been carried out for porous membrane by means of two-dimensional, non-isothermal stationary mathematical model. A mathematical model of the catalytic membrane reactor was applied, in order to study the effects of transport properties of the porous membrane on process performance. The performed modeling of the heat and mass transfer processes within the porous membrane, allowed us to estimate the efficiency of its use in membrane reactors, in comparison with a dense membrane (with additional oxidation of the hydrogen in shell side). The use of a porous ceramic membrane was found to cause an increase of the ethylbenzene conversion at 600°C, up to 93 %, while the conversion in the case of conventional reactor was 67%. In this work, we defined the key parameter values of porous membrane (pore diameter and thickness) for ethylbenzene dehydrogenation in catalytic membrane reactor, at which the highest conversion of ethylbenzene and styrene selectivity can be reached.

scholarly journals Novel Membrane Reactor with Filamentous Catalytic Bed for Propane Dehydrogenation

2001 ◽  
Vol 40 (23) ◽  
pp. 5234-5239 ◽  
Author(s):  
O. Wolfrath ◽  
L. Kiwi-Minsker ◽  
A. Renken
Keyword(s):  
Membrane Reactor ◽  
Propane Dehydrogenation

Numerical Modeling of CO2 Splitting in High-Temperature Solar-Driven Oxygen Permeation Membrane Reactors

2020 ◽  
Vol 143 (2) ◽  
Author(s):  
Heng Pan ◽  
Youjun Lu ◽  
Liya Zhu
Keyword(s):  
Membrane Reactor ◽  
Continuous Production ◽  
Oxygen Permeation ◽  
Conversion Ratio ◽  
Inert Gas ◽  
Limiting Factors ◽  
Co2 Conversion ◽  
Permeable Membrane ◽  
Concentrated Solar Energy ◽  
Oxygen Permeation Membrane

Abstract H2/CO production via H2O/CO2 splitting powered by concentrated solar energy is a promising pathway for energy conversion/storage. Oxygen permeable membrane reactor serves as an alternative reactor concept for realizing this chemical path with the advantages of continuous production, easy integration, and high product selectivity. In this paper, a mathematical model of steady-state mass and heat transfer coupled with reaction kinetics in the oxygen permeation membrane reactor was established. CO2 splitting in the ceria membrane reactor was simulated and the effects of various factors, including inert/CO2 flow configurations, reaction conditions, and geometric parameters of the membrane, on the CO2 conversion process, were studied. The increase of operating temperature could effectively improve the CO2 conversion ratio, and the effect of decreasing the oxygen pressure of the inert gas is very limited. The oxygen accumulation in the inert gas could lead to considerably high inert demand. Furthermore, conversion-limiting factors were studied under different conditions and there are two critical rate constants of reactions signifying a transition from a chemical kinetics limited conversion to oxygen diffusion limited conversion. This work helps guide reactor design and operate toward achieving the maximum CO2 conversion ratio.

Modeling of a combined ion transport and porous membrane reactor for oxy-combustion

2013 ◽  
Vol 446 ◽  
pp. 230-243 ◽  
Author(s):  
M.A. Habib ◽  
Pervez Ahmed ◽  
Rached Ben-Mansour ◽  
Hassan M. Badr ◽  
Patrick Kirchen ◽  
...  
Keyword(s):  
Ion Transport ◽  
Membrane Reactor ◽  
Porous Membrane

scholarly journals Theoretical Study of Palladium Membrane Reactor Performance During Propane Dehydrogenation Using CFD Method

2017 ◽  
Vol 17 (1) ◽  
pp. 113 ◽  
Author(s):  
Kamran Ghasemzadeh ◽  
Milad Mohammad Alinejad ◽  
Milad Ghahremani ◽  
Rahman Zeynali ◽  
Amin Pourgholi
Keyword(s):  
Membrane Reactor ◽  
Fluid Dynamic ◽  
Theoretical Data ◽  
Operating Parameter ◽  
Propane Dehydrogenation ◽  
Propane Conversion ◽  
Hydrogen Yield ◽  
Cfd Model ◽  
Reactor Performance ◽  
Pd Membrane

This study presents a 2D-axisymmetric computational fluid dynamic (CFD) model to investigate the performance Pd membrane reactor (MR) during propane dehydrogenation process for hydrogen production. The proposed CFD model provided the local information of temperature and component concentration for the driving force analysis. After investigation of mesh independency of CFD model, the validation of CFD model results was carried out by other modeling data and a good agreement between CFD model results and theoretical data was achieved. Indeed, in the present model, a tubular reactor with length of 150 mm was considered, in which the Pt-Sn-K/Al2O3 as catalyst were filled in reaction zone. Hence, the effects of the important operating parameter (reaction temperature) on the performances of membrane reactor (MR) were studied in terms of propane conversion and hydrogen yield. The CFD results showed that the suggested MR system during propane dehydrogenation reaction presents higher performance with respect to once obtained in the conventional reactor (CR). In particular, by applying Pd membrane, was found that propane conversion can be increased from 41% to 49%. Moreover, the highest value of propane conversion (X = 91%) was reached in case of Pd-Ag MR. It was also established that the feed flow rate of the MR is to be the one of the most important factors defining efficiency of the propane dehydrogenation process.

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