hydrodynamics of gas solid fluidization

... phenomena associated with gas- solid flows, as well as characteristics of selected gas- solid flow systems It covers the typical range of particle sizes of interest to gas- solid flows, i.e., ^m-10 ... propagation through a gas- solid suspension flow, thermodynamic properties of a gas- solid mixture, flow instability, and gas- solid turbulence interactions Chapter is concerned with gas- solid separations ... formulation of the momentum, heat, and charge transfer processes involving collisions of solids Chapter is devoted to the momentum and charge transfer of gas- solid flows Various forces in gas- solid...

Ngày tải lên: 02/04/2014, 15:00

... Calorific Value of coal = 14840 kJ/kg Carbon fraction of coal = 0.849948 Carbon fraction of natural gas = 0.75 Combustion efficiency of coal = 26% Combustion efficiency of natural gas = 80% Gas Turbine: ... HRSG, mg is the mass of gas (kg), hg is the enthalpy of gas at the inlet to the HRSG (kJ/kg), hstk is the enthalpy of gas at the stack conditions (kJ/kg), ms is the mass of steam generated in ... the work loss factor due to mixing of cooling air with hot ( gas in the gas turbine, hgt , g ) in ( and hgt , g ) out is the enthalpy of gas in and out of the gas turbine (kJ/kg), respectively...

Ngày tải lên: 05/09/2013, 15:28

... has two atoms of hydrogen and one of oxygen combined together Similarly, methane gas, which forms the main part of natural gas, is made up of one atoms of carbon and four atoms of hydrogen So ... characteristics of the fuel and the way it burns Table 1.4 below provides the comparison of properties of typical gases Table 1.4 Comparison of Properties of Typical Gases Natural Gas Commercial ... between the number of molecules and the volume of gases, the equation shows the volumes of gases involved So, FIGURE 2.4 Combustion of methane 18 Combustion FIGURE 2.5 The volumes of gases involved...

Ngày tải lên: 16/02/2014, 07:20

... analysis The analysis of the microarray results presented in Table required the use of an arbitrary ‘cut-off’ value for level of gene expression, an approach that introduces an element of bias into the ... expression profile of cells expressing the VV-II mutant form of STAT2 was more similar to that of U6A cells than that of U6A-2 cells (Level 1) IFN treatment led to the further segregation of the sample ... number of genes in U6A and U6A-2 cells, IFN-treated U6A-VV-II cells showed the down-regulation of a substantially larger subset of genes Identification and characterization of a subset of ISGF3-independent...

Ngày tải lên: 19/02/2014, 07:20

... hence the rate of accumulation of component i in V is Rate of change of d moles of compo- = dt nent i in V np φ V xij ρj Sj dV (2.1.5) j=1 Convection Terms Part of the accumulation of component ... of the porous medium bounded by a surface, S(t) A material balance on component i in the control volume can be stated as Rate of change of amount of component i in V (t) = Net rate of inflow of ... in the presentation of the important ideas Much of the material in this book that describes flow of gas/ oil mixtures follows from the work of an exceptionally talented group of graduate students:...

Ngày tải lên: 05/03/2014, 18:20

... stress 6 REVIEW OF ELEMENTARY PRINCIPLES Thus the amount of deformation is of no significance (as it is with a solid) , but rather, the rate of deformation is characteristic of each individual ... definition (final value of N)t+ dN ≡ lim t→0 dt − (initial value of N)t t t (2.13) where the final value of N is the N of regions and computed at time t + the initial value of N is the N of regions and ... this form of the continuity equation in several future derivations 2.6 CONSERVATION OF ENERGY The first law of thermodynamics is a statement of conservation of energy For a system composed of a given...

Ngày tải lên: 17/03/2014, 14:01

... the processing of wastes derived from animal sources Biodegradable Capable of being degraded by plants and animals Biogas Gas resulting from the fermentation of waste in the absence of air (methane/carbon ... sulphide (a corrosive gas) ; moisture removal; pressurization to boost gas pressure; and removing carbon dioxide to increase the calorific value of the biogas However, the cost of the equipment required ... incorporate a number of different processes in a variety of combinations Additionally, MBT plant can be built for a range of purposes This section provides an overview of the range of techniques employed...

Ngày tải lên: 18/03/2014, 01:21

... insulating grains The ratio of the slopes of straight lines, A/B, gives the ratio of reaction rate constants (k2 ) of H2 and CO; k2 of H2 is analyzed to be 14 times as large as that of CO Similar H2 response ... processing of materials toward innovations of gas sensors Micro-platforms fabricated with MEMS techniques are almost ready to be used in gas sensors Excellent heating and cooling characteristics of them ... Theory of power laws for semiconductor gas sensors, Sens Actuators B: Chem 128 (2008) 566–573 [6] N Yamazoe, K Shimanoe, Roles of shape and size of component crystals in semiconductor gas sensor...

Ngày tải lên: 20/03/2014, 13:05

... by means of system, which consists of measuring camera, multimeter Keithley-2010 and PC Results and discussion The XPS-spectra of W4f- and O1s-levels of the samples and the results of their decomposition ... the results of decomposition of W4f-line in the annealed and non-annealed samples The maxima of peak couples correspond to W4f7/2 - and W4f5/2 -levels of tungsten atoms for W5+ -states of oxide ... surface of stoichiometric tungsten oxide is formed only of W6+ states of WO3 -phase (comps d-d , Fig 2-4) A signal from WO3 ·(OH2 )n is absent (comps e-e , Fig 2-4) The results of decomposition of...

Ngày tải lên: 20/03/2014, 13:12

... between gas liquid multiphase flows and solid gas or solid liquid multiphase flows is usually that the interface maintains its shape in the latter cases, even though the location of the solid may ... in simulating certain types of solid gas multiphase flows, they are limited to a very small class of problems One could, however, argue that simulations of the motion of particles interacting through ... development of new numerical methods for direct numerical simulations (DNS) of multiphase flows that have produced detailed studies and improved knowledge of multiphase flows While the origin of DNS of...

Ngày tải lên: 28/03/2014, 09:20

... Scientific History of the Solid Earth Earth Science A Scientific History of the Solid Earth Michael Allaby Illustrations by Richard Garratt EARTH SCIENCE: A Scientific History of the Solid Earth Copyright ... were often out of sight of land for days at a time Their landmarks were in the sky and on the sea The shape and direction of clouds, the position of the Sun, Moon, and stars, the appearance of ... August , , three small ships sailed out of the port of Palos, on the coast of the Gulf of Cádiz in southern Spain, not far from the modern city of Huelva The party reached the Canary Islands...

Ngày tải lên: 29/03/2014, 04:21

... 12 13 14 Properties of Gases Combustion Liquefied Petroleum Gas Burners Energy Pressure and Gas Flow Control of Pressure Measurement of Gas Basic Electricity Transfer of Heat Gas Controls Materials ... limits Natural gas with a CV of 39 33 MJ/m3 and a SG of 0.58 would have a Wobbe number of 51.64 PROPERTIES OF GASES Families of Gases To ensure that appliances operate correctly the gas quality ... natural gas is in the region of 0.5 So it is about half the weight of the same volume of air The specific gravity of LPG is greater than that of air 8 BASIC SCIENCE AND PRACTICE OF GAS SERVICE...

Ngày tải lên: 29/03/2014, 08:20

... solubilities) of the sample components between the two phases Gas- Sampling Valve A bypass injector permitting the introduction of a gaseous sample of a given volume into a gas chromatograph Gas Solid ... ASPECTS OF GAS CHROMATOGRAPHY Applications of Gas Chromatography Gas chromatography is a unique and versatile technique In its initial stages of development it was applied to the analysis of gases ... PRACTICE OF GAS CHROMATOGRAPHY FOURTH EDITION Edited by Robert L Grob, Ph.D Professor Emeritus, Analytical Chemistry, Villanova University Eugene F Barry, Ph.D Professor of Chemistry, University of...

Ngày tải lên: 29/03/2014, 14:20

... variables of the combined cycle plant The data of this project are based on the document of the Department of Energy of United States -7- Simulation of a Gas Power Plant Theoretical principles 1.1 Gas ... the values of the profit and the disturbances has been determined that have more effect on the profit: - 20 - Simulation of a Gas Power Plant Table 14 Results of the study of the effect of the disturbances ... Brayton cycle of the gas turbine with a low temperature moderate Rankine cycle, the heat of waste of the exit of the Brayton cycle it serves as entrance of heat to the Rankine cycle The gas turbine...

Ngày tải lên: 01/04/2014, 10:57

Ngày tải lên: 24/04/2014, 17:13

Ngày tải lên: 24/04/2014, 17:18

... of the basic solids for the transesterification of soybean oil with methanol A screening of the reaction conditions has been carried out by examining the effect of the concentration of catalyst, ... standard, AB ¼ peak area of FAME, ftricaprylin ¼ response factor, Atricaprylin ¼ peak area of the internal standard, and ms ¼ weight of the sample Determination of sulfur content of biodiesel was measured ... good dispersion of K2O on Nd2O3 in the form of a monolayer due to the interaction between K2O and the surface of the support at a low loading of KOH And when the loading amount of KOH was further...

Ngày tải lên: 05/05/2014, 08:42

... permeability of the BTB of a malignant brain tumor to that of the BTB of a peripheral solid tumor, and to define the upper limit of pore size within the BTB of the respective solid tumors Using this ... extravasation of particles across the BTB of brain tumors is at the level of the glycocalyx that coats the surface of the pores in the BTB and is a "nanofilter" for the transvascular flow of particles ... over-estimation of the actual physiologic upper limit of pore size within the BTB of peripheral solid tumors Therefore, if the actual physiologic upper limit of pore size within the BTB of peripheral...

Ngày tải lên: 18/06/2014, 15:20

... Institute of Chemical Technology in Prague 2.1 Enhancements of the measurement technique The principal virtue of laboratory measurements of atmospheric gases lies in the possibility of adjusting the gas ... research is a part of the activities of the Department of Electromagnetic Field of the Czech Technical University in Prague within the framework of the research Project of the Ministry of Education, ... 2.2 Gas attenuation measurement results Measurements of the gas attenuation were accomplished with the Fabry-Perot resonator The comparison of the measured and simulated received signal levels of...

Ngày tải lên: 21/06/2014, 23:20

... and phase purity of the product Figure shows a powder XRD pattern of the as-grown ZnO nanowires and it reveals that the nanowires are composed of hexagonal ZnO The positions of the XRD peaks ... phase nature of the ZnO nanowires Inset of Fig (left) is a typical field emission scanning electron microscope (FESEM) image of the ZnO nanowires, and it shows the nanowires with diameters of several ... nanometers Most of the nanowires have length of several to tens microns The nanowires are straight and most of them show smooth surface and no ramification over their length The vapor–liquid solid (VLS)...

Ngày tải lên: 22/06/2014, 01:20