Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 147 for “"Packed Bed"”.
-
Electrochemical Packed Bed Reactors
Made available in DSpace on 2014-12-13T18:55:32Z (GMT). No. of bitstreams: 1 7624150.pdf: 5329964 bytes, checksum: 5fc4b35ef9bbc2df36b3b2cdbab9bb37 (MD5) Previous issue date: 1976
-
Flow Patterns in a Packed Bed
Made available in DSpace on 2014-12-08T23:18:17Z (GMT). No. of bitstreams: 1 6607760.pdf: 9059142 bytes, checksum: 92faf28de840766952befa5b978fa81c (MD5) Previous issue date: 1966
-
Bioremediation of Phenolic Compounds in Circulating Packed Bed Bioreactor
… systems and in continuously operated circulating packed bed bioreactors (CPBBs). The biodegradation of individual phenol, o-cresol, and p-cresol and mixtures of these compounds (binary and ternary mixtures) were studied. In addition to creating kinetic data on biodegradation of these contaminants, …
-
Dairy Manure Flushwater Treatment by Packed-Bed Anaerobic Digesters
… treatment performance of three pilot-scale packed-bed anaerobic digesters with walnut shell medium was researched for treating dairy freestall barn flushwater. Reciprocation mixing was evaluated as a means to lessen channelization in the media bed and to improve biogas production and organic …
-
Mixing in a fluid flowing through a packed bed
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1948.
-
Optimisation of biogas production from percolating packed bed anaerobic digesters
Percolating packed bed digesters were operated successfully in a batch mode using a wheat straw - dairy manure substrate of between 21 and 27% total solids. The vessels used had a nominal 10 1 volume and were constructed of perspex. Temperatures of 25-35°C were used, recirculation rates of 0-15 …
-
Experimental and modeling studies on a catalytic packed bed membrane reactor
… effects of operating conditions in a catalytic packed bed membrane reactor were investigated with the reactant gases H 2 and CO flowing through the membrane tube, and an inert gas N 2 flowing on the outside. The reaction under study was methanol synthesis with BASF catalyst, and a gamma-alumina …
-
Analysis of Batch and Packed Bed Reactor Models for the Carbon-Chloraminereactions
Made available in DSpace on 2014-12-13T19:31:36Z (GMT). No. of bitstreams: 1 7714971.pdf: 4040695 bytes, checksum: f4a23e3d1f7c3e8792b600740a24336a (MD5) Previous issue date: 1977
-
A Model of Transient Heat Transfer in a Packed Bed of Alumina Particles
The present study seeks to develop a robust system-scale heat transfer model for a sensible heat storage system. A novel mechanism to simulate axial dispersion and heat loss from the boundary of the sensible heat system to the environment is introduced. The most challenging topics to develop a …
-
Methane Production by a Packed-Bed Anaerobic Digester Fed Dairy Barn Flush Water
<p>Packed-bed digesters are an alternative to covered lagoon digesters for methane production and anaerobic treatment of dilute wastewaters such as dairy barn flush water. The physical media of packed-beds retain biofilms, often allowing increased treatment rates. Previous studies have evaluated …
-
An Experimental Study of An Adiabatic Packed-Bed Reactor: Steady-State Multiplicity and Related Behavior
Made available in DSpace on 2014-12-10T21:24:52Z (GMT). No. of bitstreams: 1 7405738.pdf: 10616638 bytes, checksum: 4161f2a7273cdc5a5fd6dc7ce6a1de61 (MD5) Previous issue date: 1973
-
Design, construction and commissioning of a packed bed reactor system for methane to methanol conversion
… as well as the presence of a promoter. Thus, a packed bed reactor system capable of safely operating under high pressures (< 50 bar) is designed and constructed to investigate the performance of platinum-based catalysts in the direct oxidative conversion of methane to methanol whilst co-feeding …
-
Development of a sulfate reducing packed bed bioreactor for use in a sustainable hydrogen production process
… process, namely, the design and operation of a packed bed bioreactor with high volumetric H2S production (mol/m3.d) and its comparison to analogous methanogenic technology. A novel method of inoculum design was developed by evaluating the kinetics and immobilization potential of Desulfovibrio …
-
CFD Simulations of Chemical Looping Combustion in a Packed Bed and a Bubbling Bed Fuel Reactor
… research, first the CFD simulations of a CLC packed bed fuel reactor with ilmenite and carbon monoxide are conducted and compared with the experiments of Galucci; the simulations are performed for hot flow with chemical reactions simulating the exact experimental conditions. The previous …
-
Experimental and modeling studies using packed bed reactors: Liquid phase ethylene production by hydrogenation of acetylene
… hydrogenation of acetylene was investigated in packed bed reactors (PBR) using a commercial catalyst. The reactor performance of two-phase flow PBRs was assessed experimentally complemented by a validated mathematical model at different scales.</p><p>The selective hydrogenation of acetylene in …
-
Packed bed reactors at the pellet scale: magnetic resonance studies of hydrodynamics, mass transport and reaction
Packed bed reactors are widely used in the chemical and petrochemical industries to facilitate heterogeneous catalytic reactions. Despite the widespread use of packed bed reactors in industry, the flow, transport, and reaction phenomena occurring at the scale of individual catalyst pellets is …
-
Towards an understanding of mass transfer and hydrodynamics in packed bed reactors using Nuclear Magnetic Resonance
… phenomena that govern the performance of packed bed reactors. The aim of this work is to gain insight into factors that affect the process of fines deposition and mass transfer inside packed beds to ultimately enable optimisation of these processes. Although mass transfer correlations …
-
Mathematical modeling and simulation of the performance of potassium glycinate in CO2 absorption in a packed-bed absorption column
The aim of this research undertaking was to develop a mathematical model representation for the capture of CO2 using potassium glycinate as the absorption solvent. To this end, the study was subdivided into three major parts each designed to generate the requisite data for the subsequent stage. The …
-
A Two-Dimensional Heterogeneous Numerical Model for Auto-Thermal Reforming of Synthetic Crude Glycerol in a Packed Bed Tubular Reactor
… synthetic crude glycerol (CG) to hydrogen gas in packed bed tubular reactor (PBTR). The models were heterogenous, considering the presence of the solid catalyst and created with two numerical methods, the finite difference method (FDM) in MATLAB and the finite element method (FEM) in COMSOL …
-
Hydrogen Production by Water Gas Shift Reaction Following Dry Reforming of Biogas Methane in Membrane and Packed Bed Tubular Reactors
… reaction at 500oC at atmospheric pressure in a packed bed tubular reactor using 30% CO/balance N2 gas and the catalyst with Ca promoter element showed the best performance. This catalyst was further tested using reformate gas comprising of 46.2%CO, 8.5% CH4, 7.2% CO2 and 38.1 % H2 to simulate a …
Page 1 of 8