نتایج جستجو برای: liquid gas

تعداد نتایج: 442481  

2011
Jessica R Breen Graham Sandford Dmitrii S Yufit Judith A K Howard Jonathan Fray Bhairavi Patel

4-Fluoropyrazole systems may be prepared by a single, sequential telescoped two-step continuous gas/liquid-liquid/liquid flow process from diketone, fluorine gas and hydrazine starting materials.

Journal: :jundishapur journal of health sciences 0
aazam derakhshannezhad department of environmental sciences, science and research branch, islamic azad university, khouzestan, ahvaz, ir iran mohammad sedegh sekhavatjou1 department of environmental health, school of health, ahvaz jundishapur university of medical sciences, ahvaz, ir iran mohammad sedegh sekhavatjou1 department of environmental health, school of health, ahvaz jundishapur university of medical sciences, ahvaz, ir iran gholam reza goodarzy department of environmental health, school of health, ahvaz jundishapur university of medical sciences, ahvaz, ir iran mohammad medhi baneshi department of environmental health, school of health, shahid beheshti university of medical sciences, tehran, ir iran zahra nazari department of environmental health, school of health, shahid beheshti university of medical sciences, tehran, ir iran

polycyclic aromatic hydrocarbons (pahs) which are toxic pollutants are released by various sources of urban combustion. ahvaz in iran with around a million population and the industrial and oil centers, has encountered air quality problems. samples of dibenzo (a,h) antheracen were collected from six stations in ahvaz particle and gas phase in summer 2010. dibenzo(a,h) antheracen were collected ...

Journal: :iranian journal of oil & gas science and technology 2013
sadegh mahmoudi abdonabi hashemi shahin kord

this work is a primary achievement in studying the co2 and n2–oil systems. to predict gas-liquid relative permeability curves, a shan-chen type multicomponent multiphase lattice boltzmann model for two-phase flow through 2d porous media is developed. periodic and bounce back boundary conditions are applied to the model with the guo scheme for the external body force (i.e., the pressure gradient...

2003
S. J. HAN B. H. TAN

A gas-liquid-solid inverse  uidization airlift bioreactor was proposed by combining advantages of external-loop airlift reactors and inverse  uidized beds. This airlift bioreactor comprises a gas-liquid riser, a gas separator, a liquid-solid inverse  uidized downcomer and a bottom connector. The effects of the gas velocity and the particle loading on the gas holdup in the riser and the liqui...

Ebrahim Vasheghani-Farahani Fatemeh Yazdian Mohammad Reza Mehrnia, Mohsen Nosrati Seyed Abbas Shojaosadati,

The performance of a forced-liquid Vertical Tubular Loop Bioreactor (VTLB), a forced-liquid Horizontal Tubular Loop Bioreactor (HTLB) and a gas-induced External Airlift Loop Bioreactor (EALB) were compared for production of biomass from natural gas. Hydrodynamic characteristics and mass transfer coefficients were determined as functions of design parameters, physical properties of gases as ...

Journal: :نشریه دانشکده فنی 0
علیرضا صالح پور خشایار نصری فر

in this contribution, two approaches are followed to predict the saturated liquid density of liquefied natural gas (lng) mixtures. in one approach, 12 cubic equations of state (eoss), comprising the popular peng-robinson (pr) and redlich-kwong-soave (rks), are employed to predict the saturated liquid density of 20 lng mixtures. in the other approach, these eos are used in conjunction with a rec...

1998
D. D. JOSEPH A. C. BANNWART Y. J. LIU

In this work we propose an effective viscosity criterion for the stabilization of annular gas-liquid and liquid-particle flows and an inertial mechanism which drives waves into slugs in slugging gas-liquid flows. Annular flow is stable when the fluid having the higher effective viscosity occupies the core region and the lower viscosity fluid is the annulus. The eddy viscosity criterion is shown...

Ali Reza Salehpour Khashayar Nasrifar

In this contribution, two approaches are followed to predict the saturated liquid density of liquefied natural gas (LNG) mixtures. In one approach, 12 cubic equations of state (EoSs), comprising the popular Peng-Robinson (PR) and Redlich-Kwong-Soave (RKS), are employed to predict the saturated liquid density of 20 LNG mixtures. In the other approach, these EoS are used in conjunction with a rec...

2013
Bin Zhao

In order to analyze the changing rules of temperature and pressure of the gas-liquid coupled field of LPG (Liquefied Petroleum Gas) tank under fire, the application of the wavelet finite element method on it is studied in depth. First, the research achievements of thermodynamics response of the LPG tank under fire and the wavelet finite element theory is summarized. Second the temperature-press...

2013
Baharak Sajjadi Mostafa Keshavarz

Investigation of turbulency on the rate of induced liquid circulation, gas hold-up, mixing time and overall gas–liquid volumetric oxygen mass transfer coefficient. The various types of surfactants (containing Brij58, TritonX-405, Tween40, HCTBr) with various concentrations of 1-5 ppm were examined on the operational characteristics of the reactor. In surfactant solutions (in comparison with pur...

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