adsorption of gas mixtures

Thermodynamic analysis of gas – steam combined cycle with carbon dioxide (CO2) emissions saving

Ngày tải lên : 05/09/2013, 15:28

... 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...

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Tài liệu ADSORPTION OF ORGANIC COMPOUNDS doc

Ngày tải lên : 14/02/2014, 03:20

... during adsorption Adsorption Kinetics Transport Mechanisms Removal of organic compounds by physical adsorption on porous adsorbents involves a number of steps, each of which can affect the rate of ... value of qe that can be achieved as Ce is increased The constant b is related to the energy of adsorption and increases as the strength of the adsorption bond increases The Langmuir equation often ... compounds The quantity of activated carbon or other adsorbent required to remove a certain amount of a compound of interest ADSORPTION OF ORGANIC COMPOUNDS 13.7 from a mixture of adsorbable compounds...

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Tài liệu Tolley’s Basic Science and Practice of Gas Service Gas Service Technology Volume 1 docx

Ngày tải lên : 16/02/2014, 07:20

... 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...

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Tài liệu Báo cáo khoa học: Identiﬁcation of GAS-dependent interferon-sensitive target genes whose transcription is STAT2-dependent but ISGF3-independent doc

Ngày tải lên : 19/02/2014, 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...

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Theory of Gas Injection Processes Franklin M. Orr, Jr. Stanford University Stanford ppt

Ngày tải lên : 05/03/2014, 18:20

... 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: ... 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...

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Adsorption of cd (II) in kaolinite

Ngày tải lên : 15/03/2014, 23:09

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Adsorption of heavy metal inons on soils and soil constituents

Ngày tải lên : 15/03/2014, 23:09

... measure of the afﬁnity of the adsorbate for the surface The value of b is the upper limit for qi and represents the maximum adsorption of i determined by the number of reactive surface adsorption ... others Adsorption as a function of pH and ionic strength is described as a competition for adsorption sites only The effects of modifying the electric properties of the surface due to the adsorption ... metal complex adsorption Only a few studies have examined the adsorption of metal–inorganic complexes The majority of studies on ternary complexes have focused on the adsorption of metals complexed...

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ADSORPTION OF pb AND cd ONTO METAL OXIDES

Ngày tải lên : 15/03/2014, 23:12

... Test for adsorption interference between Cd and Pb A Pb adsorption to bio®lms in the presence and absence of Cd B Cd adsorption in the presence and absence of Pb For adsorption from mixtures, ... with a total of eight variables (four values of Gmax and four values of Ki) i The data set consisted of adsorption data for the unextracted bio®lms plus bio®lms extracted with each of the three ... removed 14% of the Fe, 39% of the Al and 32% of the organic material (Table 2) Na2S2O4 removed 83 and 92% of the Fe and Mn, respectively, but also removed 83% of the Al Very little (3%) of the organic...

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One dimensional organic nanostructures a novel approach based on the selective adsorption of organic molecules on silicon nanowires

Ngày tải lên : 16/03/2014, 15:35

... thickness of the ONWs is of the order of several ångström, the observed LDOS is a convolution of the LDOS of the SiNWs and that of the adsorbed PQ aggregates Therefore, the contribution of the LDOS of ... after a signiﬁcant amount of time for diffusion of THAP molecules is given, the adsorption remains non preferential Having established that no preferential adsorption of THAP on the SiNWs is observed, ... analysis of the Si2p core levels and valence band of the surface [1] To address the issue of whether or not any type of molecule will react exclusively with the SiNWs, we used two different types of...

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Fundamentals of gas dynamics, 2e r zucker, o biblarz

Ngày tải lên : 17/03/2014, 14:01

... 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 ... variety of practical engineering problems can be solved with these concepts, and many of these problems are covered throughout the text Examples of these are the off-design operation of supersonic...

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new perspectives of gas sensor technology

Ngày tải lên : 20/03/2014, 13:05

... 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...

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xps studies of active elements surface of gas sensors based on wo3nanoparticles

Ngày tải lên : 20/03/2014, 13:12

... 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...

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DIRECT NUMERICAL SIMULATIONS OF GAS–LIQUID MULTIPHASE FLOWS pot

Ngày tải lên : 28/03/2014, 09:20

... 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 ... investigated a number of problems Pozrikidis and collaborators have examined several aspects of suspensions of droplets, starting with a study by Zhou and Pozrikidis (1993) of the suspension of a few two-dimensional ... 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...

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TOLLEY’S BASIC SCIENCE AND PRACTICE OF GAS SERVICE Volume 1 pptx

Ngày tải lên : 29/03/2014, 08:20

... 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...

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Modern Practice of Gas Chromatography pdf

Ngày tải lên : 29/03/2014, 14:20

... 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 ... 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 ... 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...

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simulation of gas power plant

Ngày tải lên : 01/04/2014, 10:57

... 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...

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principles of gas-solid flows

Ngày tải lên : 02/04/2014, 15:00

... to the gas molecules The determination of particle surface area by gas adsorption is given in §1.2.2.4 The fundamentals of gas adsorption are further covered in §1.4.1 The volume diameter of a ... percentage of unoccupied adsorption sites (1 — £), where £ is the ratio of the number of occupied sites to the total number of adsorption sites on the solid surface At equilibrium, the rate of adsorption ... chlorine The green color of the gas disappeared With the heating of the flask, the greenish chlorine gas reappeared This phenomenon, known as adsorption, is the accumulation of gas on a solid surface...

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Báo cáo hóa học: " Research Article A Study of Gas and Rain Propagation Effects at 48 GHz for HAP Scenarios" doc

Ngày tải lên : 21/06/2014, 23:20

... 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...

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Báo cáo hóa học: " Inﬂuences of H on the Adsorption of a Single Ag Atom on Si(111)-7 3 7 Surface" doc

Ngày tải lên : 22/06/2014, 00:20

... between the H3 and B2 sites The change of the adsorption site of Ag atom because of the pre -adsorption of H on Si(111)-7 may be due to the reconstruction of Si surface electronic structures induced ... cause the relaxation of the surface bond strain and reduce the surface free energy [26, 27] The pre -adsorption of H on Si(111)7 will alter the growth mode and morphology of the metal overlayers ... First-principles calculations within the framework of density functional theory (DFT) were applied to study the inﬂuences of H on the adsorption of Ag on the Si(111)7 surface using the Vienna ab...

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Báo cáo hóa học: " Effects of Gas Composition on Highly Efﬁcient Surface Modiﬁcation of Multi-Walled Carbon Nanotubes by Cation Treatment" pptx

Ngày tải lên : 22/06/2014, 01:20

... various H2/O2 gas mixtures to the treatment through the control of gas ﬂow ratio Furthermore, the manner in which the gas conditions correlate with morphology and structural changes of the nanotubes ... output power of approximately 750 W was inserted into the plasma chamber through a quartz window H2 and/or O2 gas mixtures were fed as etching gases with controlled gas ﬂow ratios of 50/0, 40/10, ... the surface of the tubes The ratio of H2 to O2 is critical to the process because it directly correlates with the composition of the generated cations In this study, the effect of gas composition...

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