scholarly journals Simulation and Experimental Study of a Single Fixed-Bed Model of Nitrogen Gas Generator Working by Pressure Swing Adsorption

Processes ◽  
2019 ◽  
Vol 7 (10) ◽  
pp. 654 ◽  
Author(s):  
Pham Van Chinh ◽  
Nguyen Tuan Hieu ◽  
Vu Dinh Tien ◽  
Tan-Y Nguyen ◽  
Hoang Nam Nguyen ◽  
...  
Keyword(s):  
Molecular Sieves ◽  
Pressure Swing Adsorption ◽  
Selective Adsorption ◽  
Scale Up ◽  
Fixed Bed ◽  
Food Storage ◽  
Gas Generator ◽  
Nitrogen Gas ◽  
Institute Of Technology ◽  
Pressure Swing

Nitrogen is an inert gas available in the air and is widely used in industry and food storage technology. Commonly, it is separated by air refrigerant liquefaction and fractional distillation techniques based on different boiling temperatures of components in the mixed air. Currently, selective adsorption techniques by molecular sieve materials are studied and applied to separate gases based on their molecular size. In this paper, we simulate and investigate the effect parameters in a single fixed-bed model of a nitrogen gas generator using carbon molecular sieves, following pressure swing adsorption. This study aims to identify the effect of changing parameters so as to select the optimal working conditions of a single fixed-bed model, used as a basis for equipment optimization. This equipment was designed, manufactured, and installed at the Institute of Technology, General Department of Defense Industry, Vietnam to investigate, simulate, and optimize the industrial scale-up.

scholarly journals Study on calculating kinetic parameters of mathematical model describing the adsorption process of a single fixed bed of N2 gas generator working by pressure swing adsorption (PSA) and using carbon molecular sieves CMS-240

2021 ◽  
Vol 9 (1) ◽  
Author(s):  
Chinh Pham Van ◽  
Tuan Le Quang ◽  
Hieu Nguyen Tuan ◽  
Tien Vu Dinh
Keyword(s):  
Mathematical Model ◽  
Molecular Sieves ◽  
Pressure Swing Adsorption ◽  
Adsorption Process ◽  
Operating Conditions ◽  
Model Parameters ◽  
Gas Generator ◽  
Carbon Molecular Sieves ◽  
Adsorption Column ◽  
Pressure Swing

Nitrogen generator working by pressure swing adsorption cycle using carbon molecular sieves adsorbent is widely used in industry at small and medium scale in recent years, due to its convenience. This is equipment that uses a molecular size selective adsorption technique to separate nitrogen from air. In general, kinetic modeling and optimization are commonly used to analyze the process dynamics of the adsorption column at various operating conditions in which process parameters such as gas concentration, operating temperature and pressure are considered to be functions of time and bed height. In this paper, a mathematical model describing the adsorption column according to the pressure function is established following time and the height of the bed assuming that the velocity through area of the bed is constant at each pressure. The results of these calculations are model parameters that describe the adsorption process of the column. This model can be solved by MATLAB software to simulate the adsorption process of the column. This study was carried out on a nitrogen gas generator that was researched and designed at the Institute of Technology - General Department of Defense Industry to simulate, optimize and scale-up.

Study on calculating kinetic parameters of mathematical model describing the adsorption process of a single fixed bed of N2 gas generator working by pressure swing adsorption (PSA) and using carbon molecular sieves CMS-240

2020 ◽  
Vol 9 (1) ◽  
Author(s):  
Chinh Pham Van ◽  
Tuan Le Quang ◽  
Hieu Nguyen Tuan ◽  
Tien Vu Dinh
Keyword(s):  
Mathematical Model ◽  
Molecular Sieves ◽  
Pressure Swing Adsorption ◽  
Adsorption Process ◽  
Operating Conditions ◽  
Model Parameters ◽  
Gas Generator ◽  
Carbon Molecular Sieves ◽  
Adsorption Column ◽  
Pressure Swing

Nitrogen generator working by pressure swing adsorption cycle using carbon molecular sieves adsorbent is widely used in industry at small and medium scale in recent years, due to its convenience. This is equipment that uses a molecular size selective adsorption technique to separate nitrogen from air. In general, kinetic modeling and optimization are commonly used to analyze the process dynamics of the adsorption column at various operating conditions in which process parameters such as gas concentration, operating temperature and pressure are considered to be functions of time and bed height. In this paper, a mathematical model describing the adsorption column according to the pressure function is established following time and the height of the bed assuming that the velocity through area of the bed is constant at each pressure. The results of these calculations are model parameters that describe the adsorption process of the column. This model can be solved by MATLAB software to simulate the adsorption process of the column. This study was carried out on a nitrogen gas generator that was researched and designed at the Institute of Technology - General Department of Defense Industry to simulate, optimize and scale-up.

Pressure swing adsorption separation of H2S/CO2/CH4 gas mixtures with molecular sieves 4A, 5A, and 13X

2017 ◽  
Vol 53 (10) ◽  
pp. 1490-1497
Author(s):  
Howell H. Heck ◽  
Merilyn L. Hall ◽  
Rudy dos Santos ◽  
Manolis M. Tomadakis
Keyword(s):  
Molecular Sieves ◽  
Pressure Swing Adsorption ◽  
Gas Mixtures ◽  
Pressure Swing

Impact of Process Parameters on Oxygen-Bearing Low Concentration Coal Mine Methane Enrichment by Proportion Pressure Swing Adsorption

2012 ◽  
Vol 549 ◽  
pp. 961-965
Author(s):  
Yong Ling Li ◽  
Ying Shu Liu ◽  
Xiong Yang ◽  
Yu Meng ◽  
Chuan Zhao Zhang
Keyword(s):  
Oxygen Concentration ◽  
Coal Mine ◽  
Molecular Sieves ◽  
Pressure Swing Adsorption ◽  
Methane Concentration ◽  
Exhaust Gas ◽  
Adsorption Time ◽  
Low Concentration ◽  
Coal Mine Methane ◽  
Pressure Swing

Conventional PSA methods with a single adsorbent can result in an explosive CH4 concentration of 5 to 15%, making low concentration coal mine methane (LCCMM) or risky in terms of safety at a concentration of 30%. Proportion Pressure Swing Adsorption (PPSA) is a new and safer enrichment method suggested for LCCMM enrichment that uses a mixture of active carbon (AC) and carbon molecular sieves (CMS) as adsorbents. The effect of adsorption Pressure, adsorption time and bed length on the PPSA process were investigated to verify the feasibility of this method. The experiment results show that the methane concentration in desorption gas and the oxygen concentration in exhaust gas increased and decreased, respectively, with an increase in adsorption pressure or bed length. And the methane concentration in desorption gas is increased with the adsorption time expanding, but the recovery of methane is reduced. So the methane concentration in desorption gas can be increased to more than 30% and the oxygen concentration in exhaust gas be decrease to less than 12% by increasing the adsorption pressure or lengthening the bed.

scholarly journals Capture of low grade methane from nitrogen gas using dual-reflux pressure swing adsorption

2015 ◽  
Vol 281 ◽  
pp. 739-748 ◽  
Author(s):  
Thomas L. Saleman ◽  
Gang (Kevin) Li ◽  
Thomas E. Rufford ◽  
Paul L. Stanwix ◽  
K. Ida Chan ◽  
...  
Keyword(s):  
Pressure Swing Adsorption ◽  
Low Grade ◽  
Nitrogen Gas ◽  
Pressure Swing

Adsorption Characteristics of Nitrogen and Oxygen onto Ion-Exchanged X-Type Zeolite

2007 ◽  
Vol 119 ◽  
pp. 143-146 ◽  
Author(s):  
Heon Do Jeong ◽  
Dong Sik Kim ◽  
Kweon Ill Kim ◽  
In Kyu Song
Keyword(s):  
Pressure Swing Adsorption ◽  
Selective Adsorption ◽  
Air Separation ◽  
Zeolite A ◽  
Equilibrium Pressure ◽  
Adsorption Characteristics ◽  
X Zeolite ◽  
Type Zeolite ◽  
Pressure Swing ◽  
Adsorption Capability

Adsorption characteristics of nitrogen and oxygen onto the ion-exchanged X-type zeolites through pressure swing adsorption (PSA) process were investigated. On the basis of Na-X zeolite, a series of ion-exchanged X-type zeolites containing Ag, Li, Ca, Sr, Br, and K were prepared and investigated in this work. It was revealed that the ion-exchanged X-type zeolites showed a remarkably improved and selective adsorption capability for nitrogen. At equilibrium pressure under 0.5 atm, adsorption capability for nitrogen was decreased in the order of Ag-X > Li-X > Sr-X > Ca-X > Na-X > Ba-X > K-X. At equilibrium pressure over 1 atm, however, the capability was decreased in the order of Li-X > Ag-X > Sr-X > Ca-X > Na-X > Ba-X > K-X. The Li-X zeolite exhibited the selective adsorption capability for nitrogen in the air separation process at high pressure. The separation factor for nitrogen/oxygen (= N2/O2) in the Li-X zeolite was ca. 13.

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