mathematical modeling of catalytic fixed bed reactors

... which resulted in the development of two main categories: fixed bed and fluidized bed gasifier Fluidized bed reactors operate with a fluidized mixture of biomass and a bed material (inert sand or catalyst); ... quantities of available biomass, up to 500 kW of electric power Puig-Arnavat et al [4] reported that 75% of the manufactured gasifiers in the world are of downdraft gasifier type Modeling of gasification ... compensates the decrease of the char conversion at the bottom of the bed 4.5 Effect of particle size on the gas production The effect of the particle diameter at the inlet of the gasification zone

Ngày tải lên: 01/08/2016, 09:31

... show the molar rates of production of species due to gas- phase and surface reactions, respectively The rate of production of species k comes from summing the rate of progress of each reaction (forward ... index of a system is loosely defined as the number of differentiations of the system of equations required to yield an explicit ODE system for all of the unknowns [82] In the present system of equations, ... "Numerical Modeling of Catalytic Ignition," Proceedings of the Combustion Institute, Vol 26, 1996, pp 1747-1754 [22] Kolaczkowski, S.T., "Modelling catalytic combustion in monolith reactors -

Ngày tải lên: 02/10/2024, 02:03

... Asst Prof Koh Cheng Gee, Prof Philip R. LeDuc and Prof Benoit Ladoux who provided the experimental expertise cited in this thesis, and my main supervisor Prof Lim Chwee Teck for his support of my ... found that the appearance of CDRs is often accompanied by the disappearance of actin-rich stress fibers. While the generation of CDRs can been attributed to the activation of the Rac, stress fibers ... relationship. Proceedings of the National Academy of Sciences of the United States of America, 107(20):9141–9146, 2010. 181 [223] D. Sept and J. A. McCammon. Thermodynamics and kinetics of actin filament

Ngày tải lên: 09/09/2015, 18:51

... COMSOL Multiphysics; Mathematical Modeling; ... Design of Experiments List of Tables 1.1 Reactions of popular liquid fuels for the DLFC 5 1.2 Types of scenarios modeling can aid in ... convergence of analytical solutions as a function of number of eigenvalues (normalized with the... troubleshooting of experiments, designs, and failures In addition, the mathematical ... Mathematical Modeling of Direct Liquid Fuel Cells Multidimensional Analytical Solutions and Experimental Validation EE SHER LIN (B. Eng, Hons.) A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR

Ngày tải lên: 10/09/2015, 08:26

... Contributions of mathematical modeling of beta cells to the understanding of beta-cell oscillations and insulin secretion J Diabetes Sci Technol 3: 12–20 Pedersen MG (2010) A biophysical model of electrical ... as a shell of depth *190 nm The radius of a human b-cell is *13 mm, which gives cell volume (Volc ), shell volume (Volm ) and internal surface area (Am ) of the shell, of Methods Modeling We ... study of the role of SK-channels in spiking electrical activity, e.g., it was crucial for explaining the larger effect of TTX on spike amplitude in this version of the model Most models of electrical

Ngày tải lên: 02/11/2022, 14:30

... is often a lack of well-formed conceptual ideas and sophisticated mathematical modeling in the analysis of fundamental issues involved in atomic and molecular interactions of nanostructures Mathematical ... open-access-at-sage) 2 mathematical modeling in nanotechnology is reviewed, and particularly, the work of the present authors and their colleagues in the use of classical mathematical modeling procedures ... Department of Mathematics, Faculty of Science, Mahidol University, Bangkok, Thailand Centre of Excellence in Mathematics, CHE, Bangkok, Thailand School of Information Technology & Mathematical

Ngày tải lên: 04/12/2022, 15:13

... MATHEMATICAL MODELING OF TRANSPORT PHENOMENA IN LITHIUM-ION BATTERIES TONG WEI A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF PHILOSOPHY DEPARTMENT OF MECHANICAL ENGINEERING ... knowledge and experience Prof Erik Birgersson opened the door for me to the world of an exciting research area - mathematical modeling of electrochemical energy storage system Prof Erik Birgersson always ... performance Journal of Power Sources, 112(2):606– 613, 2002 [52] P Ramadass, Bala Haran, Ralph White, and Branko N Popov Mathematical modeling of the capacity fade of Li-ion cells Journal of Power Sources,

Ngày tải lên: 09/09/2015, 08:12

... reserved. 823 Table 4. Data of variable bed depth at a fixed flow rate in a fixed-bed column for the removal of MB onto PAC2 Bed Depth (Z) (cm) Bed Volume (V) (cm 3 ) Mass Of Adsorbent (M) (g) EBRT ... data of variable bed depth at a fixed flow rate (2 ml/min) in a fixed-bed column (3mm) for the removal of MB onto PAC2. The data in Table 4 shows that EBRT, Vb and Tb increased with increasing bed ... calibration of fixed-bed adsorption models with microcolumn data could satisfactorily simulate the bed performance for large column. The focus of this work is directed at the evaluation of the success of

Ngày tải lên: 05/09/2013, 16:11

... Mathematical Modeling and Analysis of Organic Bulk Heterojunction Solar Cells Zhang Teng B.Eng.(Hons.), NUS A Thesis Submitted For the Degree of Doctor of Philosophy Deparment of Chemical ... carrier transport; recombination; exciton; mathematical modeling; volume-averaging iii Preface This thesis presents topics on the mathematical modeling of organic solar cells with a focus on ... understanding of device physics, the design and synthesis of new materials, the development of new device architectures, as well as the characterization and control of the... of organic

Ngày tải lên: 09/09/2015, 11:20

... are the rates of heat of formation of biomass, steam, gaseous products, and ash, respectively, and Q_ rxn is the rate of heat of reaction The impacts of two operating parameters of modified equivalence ... fugacity of species i in solution i GP the volume of product gas from the gasification of per unit weight of fuel (Nm3 kg fuelÀ1) Gt total Gibbs free energy of system (J) G0i a property of pure ... and Ak are the numbers of atoms of k element in each molecule of species i and the total number of atoms of k element in the system, respectively, and x is the total number of elements comprising

Ngày tải lên: 01/08/2016, 09:31

... fluidised bed gasifiers [24], fluidised bed gasifiers with steam as gasifying agent [25] or in fixed bed gasifiers [26] with reasonable speed and accuracy However, the prediction quality of trained ... gauge) Syngas temperature at the exit of the gasifier Syngas composition Temperature of inlet air Pressure in the reactor Z mairav ¼ Fig Scheme of co-current fixed bed biomass gasification facility ... modelling of biomass gasification in a co-current fixed bed gasifier Robert Mikulandric´ a,b,⇑, Dorith Böhning c, Rene Böhme c, Lieve Helsen d, Michael Beckmann c, Drazˇen Loncˇar a a Department of

Ngày tải lên: 01/08/2016, 09:32

... gasification in fluidized beds: equilibrium modeling and dynamic modeling considering the kinetics and hydrodynamics of the bed Dynamic modeling gives a better interpretation of the real case However, ... further development of any possible generic model This is one of the major novel contribution of this study to the field of biomass gasification modeling The investigation of further possibilities ... This means that the diameter of the bed must be provided to use MODEL III correctly The main limitation of this model is the requirement of the bed diameter or any type of similar factors that is

Ngày tải lên: 01/08/2016, 09:32

... and the true impacts of most chemicals and mixtures of chemicals are poorly understood From those points of view, the main purpose of this work is to investigate the toxicity of bottom ash arising ... terms of waste volume reduction and a source of renewable energy However, burning of solid waste in incinerators leads to serious negative environmental and human health effects, due to emission of ... addition, the probability of environmental pollution from leakage of bottom ash leachate also increases The main aim of this research is to investigate the toxicity of bottom ash, which is an

Ngày tải lên: 02/08/2016, 09:34

... Master Thesis of Direct Reduced Iron Production from EAF Slags in Fixed Bed Furnace Idil Bilen Jan, 2013 Supervisors: Prof Pär Jönsson Prof Onuralp Yücel Royal Institute of Technology, Materials ... been prepared in Royal Institute of Technology, Department of Materials Science and Istanbul Technical University Prof Dr Adnan Tekin Applied Research Center of Materials Science and Production ... to chemical analysis of every single sample in this study I especially thank to Assoc Prof Andrey Karasev and Assoc Prof Bora Derin for their kindness and time for defense of this thesis work

Ngày tải lên: 03/06/2018, 22:46

... and mathematical modeling This study uses mathematical modeling to inspect the effects of overtime option, rework, and discontinuous issuing policy on EMQ model Description of the problem with mathematical ... Rework Economic manufacturing quantity Mathematical modeling Discontinuous issuing policy This study employs mathematical modeling to explore the effects of overtime option, rework, and discontinuous ... Inventory status of finished items during t3A of the proposed EMQ-based system is depicted in Fig Fig Inventory level of finished products in t3A of the proposed EMQbased system Fig Status of on-hand

Ngày tải lên: 14/05/2020, 22:26

... Illustration of effective of optimum pressure as a function of forming time at different die entry radius initial thickness of 1.6 mm Fig Illustration of effect of pressure profile as a function of forming ... underresponsibility responsibilityof ofthe theorganizing organizingand andreview reviewcommittee committeeof ofIConDM IConDM2013 2013 Key Words: Finite Element method; Mathematical modeling; Stepped Rectangular; ... superplastic deformation capability of the Ti-Al-Mn alloy by thermoforming route SenthilKumar et al (2006) analyzed the finite element modeling of superplastic forming of AA7475 aluminium alloy in a

Ngày tải lên: 02/11/2022, 14:29

... processing of aerogels, mathematical modeling of the supercritical drying procedure could provide important information about scale-up and process optimization Mathematical models of the extraction of ... function of drying time The pore size distribution of the obtained aerogel was determined using the BET method and nitrogen adsorption/desorption The mathematical model of the supercritical drying of ... to the best of our knowledge, mathematical models describing wet gel drying with supercritical carbon dioxide are rare and oversimplified.14–16 In this paper, mathematical modeling of wet gel

Ngày tải lên: 04/12/2022, 15:12

... Department of Mathematics, University of California, Irvine, Irvine, CA, USA Department of Microbiology and Molecular Genetics, University of California, Irvine, Irvine, CA, USA Department of Pathology, ... inhibitor of mitochondrial activity, and immunohistochemical stains of Wnt signaling In particular, these stains revealed a pattern of discrete clusters of cells, or “spots”, indicating groups of cells ... subcutaneous injection of cells in immunocompromised mice To investigate metabolic changes within the tumor, 5.0- to 6.0-lm serial sections of formalinfixed, paraffin-embedded tumor were probed with antisera

Ngày tải lên: 04/12/2022, 15:13

... [...]... perspective of the fields of modeling of electrochemical conversion of CO2 and modeling of microfluidic fuel cell A 11 review on the various mathematical models ... . 14 2.2 Overview of the Electrochemical Reduction of CO2 15 2.3 Modeling of CO2 Electrolyzers . 16 2.4 Modeling of Microfluidic Fuel Cells ... developing a mathematical modeling framework for the electrochemical conversion of CO2 to CO in microfluidic reactors. Conversion of CO2 into CO is attractive due to the versatility of CO (with

Ngày tải lên: 09/09/2015, 08:12

... Journal of Water and Environment Technology, Vol.3, No.2, 2005 - 243 - ISOTOPE HYDROGRAPH SEPARATION FOR MODELING OF RUNOFF MECHANISMS OF ATMOSPHERICALLY DERIVED CHEMICAL ... about spreading of atmospheric depositions of anthropogenic heavy metals at trace levels (NIES, 1991). While a number of related studies have been carried out, the process of inflow of contaminants ... 22-23 of 2003. The amount of precipitation was 30 mm in total. Figure 2 shows the precipitation record of the studied event (Fig. 2a) and the record of the river flow rate (solid line, Fig. 2b) of

Ngày tải lên: 05/09/2013, 09:08