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Sustainable Operations For Distillation Columns, YASAR DEMIREL 2012 University of Nebraska Lincoln

Sustainable Operations For Distillation Columns, Yasar Demirel

YASAR DEMIREL

Distillation process consumes about 40% of the total energy used to operate the plants in petrochemical and chemical process industries in North America. Therefore, sustainable distillation column operation requires responsible use of energy and reduction of harmful emission such as CO2. The Aspen Plus ‘Column Targeting Tool’ (CTT) options in a simulation environment can help reduce the use of energy and hence CO2 emission. The Aspen plus ‘Carbon Tracking’ (CT) together with the ‘Global Warming Potential’ options can quantify the reduction in CO2 emission. The CTT is based on the practical near-minimum thermodynamic condition approximation and exploits the capabilities for ...


Cuckoo Search: A New Nature-Inspired Optimization Method For Phase Equilibrium Calculations, V Bhargava, Seif-Eddeen K. Fateen, Adrian Bonilla-Petriciolet 2012 Cairo University

Cuckoo Search: A New Nature-Inspired Optimization Method For Phase Equilibrium Calculations, V Bhargava, Seif-Eddeen K. Fateen, Adrian Bonilla-Petriciolet

Seif-Eddeen K Fateen

In this work, Cuckoo Search is introduced for performing phase equilibrium and stability calculations for the first time. Cuckoo Search is a population-based method that mimics the reproduction strategy of cuckoos. This meta-heuristics have been successfully used for solving some engineering design and optimization problems with promising results. However, this emerging optimization method has not been applied in chemical engineering problems including thermodynamic calculations. This study reports the application of Cuckoo Search and its modified version for phase equilibrium and stability calculations in both reactive and non-reactive systems. Performance of this nature-inspired optimization method has been analyzed using several phase ...


Determination Of Kinetic Parameters From The Thermogravimetric Data Set Of Biomass Samples, Karol Postawa, Wojciech M. Budzianowski 2012 Wroclaw University of Technology

Determination Of Kinetic Parameters From The Thermogravimetric Data Set Of Biomass Samples, Karol Postawa, Wojciech M. Budzianowski

Wojciech Budzianowski

This article describes methods of the determination of kinetic parameters from the thermogravimetric data set of biomass samples. It presents the methodology of the research, description of the needed equipment, and the method of analysis of thermogravimetric data. It describes both methodology of obtaining quantitative data such as kinetic parameters as well as of obtaining qualitative data like the composition of biomass. The study is focused mainly on plant biomass because it is easy in harvesting and preparation. Methodology is shown on the sample containing corn stover which is subsequently pyrolysed. The investigated sample show the kinetic of first order ...


The Impact Of Controlled Solvent Exposure On The Morphology, Structure And Function Of Bulk Heterojunction Solar Cells, Raghavendra Hegde 2012 Selected Works

The Impact Of Controlled Solvent Exposure On The Morphology, Structure And Function Of Bulk Heterojunction Solar Cells, Raghavendra Hegde

Raghavendra R Hegde Dr

Films of poly(3-hexyl thiophene) (P3HT):[6,6]-phenyl C61-butyric acid methyl ester (PCBM) were controllably exposed to CS2 vapor in a column with a linear solvent vapor pressure gradient. Changes in the morphology of the P3HT:PCBM thin film were monitored and correlated to the ability of this thin film to act as the active layer in an organic solar cell. The results show that the crystallinity and crystal size of the P3HT increase initially with solvent vapor pressure and annealing time, but longer exposure to solvent decreases P3HT crystallinity and photovoltaic efficiency. Neutron reflectivity indicates that the PCBM ...


Optimization Of Biodiesel Production Plants, Nghi T. Nguyen 2012 University of Nebraska-Lincoln

Optimization Of Biodiesel Production Plants, Nghi T. Nguyen

Chemical & Biomolecular Engineering Theses, Dissertations, & Student Research

A conventional biodiesel plant utilizing two distillation columns to purify unreacted reactants and products is considered in this study. Thermodynamic analyses are used to assess the performance of the existing distillation columns, and reduce the costs of operation by appropriate retrofits in a biodiesel production plant. After the retrofits, the overall exergy loss for the two columns has decreased from 2430.87 kW to 1674.12 kW.

A reactive distillation is developed for esterification of lauric acid with methanol using equilibrium and nonequilibrium models. Equilibrium modeling dominated during last few decades due to their straightforward mathematical modeling. In reality, separation ...


Plasmonic Pervaporation Via Gold Nanoparticle-Functionalized Nanocomposite Membranes, Aaron Russell 2012 University of Arkansas, Fayetteville

Plasmonic Pervaporation Via Gold Nanoparticle-Functionalized Nanocomposite Membranes, Aaron Russell

Theses and Dissertations

Butanol derived from biological feedstocks has significant potential as a liquid fuel source, but the separation methods used in its production can be prohibitively expensive and are therefore currently the subject of extensive research. Pervaporation is a promising membrane process that is effective in butanol separations, but involves a large energy demand. This study examines the possibility of increasing flux and energy efficiency in pervaporation via plasmonic heating of gold nanoparticle-functionalized, polymer nanocomposite membranes (AuNCMs) in lieu of conventional feed heating. An economic analysis demonstrated that plasmonic pervaporation could achieve significant reductions in energy usage and utility cost in butanol ...


Order-Disorder Transition Of Aragonite Nanoparticles In Nacre, Zaiwang Huang, Xiaodong Li 2012 University of South Carolina - Columbia

Order-Disorder Transition Of Aragonite Nanoparticles In Nacre, Zaiwang Huang, Xiaodong Li

Faculty Publications

Understanding nacre’s bottom-up biomineralization mechanism, particularly, how individual aragonite platelets are formed, has long remained elusive due to its crystallographic peculiarity and structural complexity. Here we report that crystallographic order-disorder transition can be triggered within individual aragonite platelets in pristine nacre by means of heat treatment and/or inelastic deformation, offering a unique opportunity to discriminate mysterious aragonite nanoparticles in transmission electron microscopy. Our findings unambiguously uncover why aragonite nanoparticles in pristine nacre have long been inaccessible under TEM observation, which is attributed to the monocrystal-polycrystal duality of the aragonite platelet. The underlying physical mechanism for why an individual ...


Molecular Dynamic Simulations Of The Effect On The Hydration Of Nafion In The Presence Of A Platinum Nanoparticle, Myvizhi Esai Selvan, Qianping He, Elisa Calvo-Muñoz, David Keffer 2012 University of Tennessee - Knoxville

Molecular Dynamic Simulations Of The Effect On The Hydration Of Nafion In The Presence Of A Platinum Nanoparticle, Myvizhi Esai Selvan, Qianping He, Elisa Calvo-Muñoz, David Keffer

David Keffer

Platinum catalysts play a critical role in fuel cell technology. Current optimization efforts focus on reducing the amount of Pt in the system and optimizing the utilization of that which remains. The effect of the presence of Pt nanoparticles on the local structure and morphology of the polymer electrolyte membrane, water, and hydronium ions has been studied at molecular level in this work. Classical molecular dynamics simulation has been used to examine a system containing a 4 nm fcc cubic ({100} face) platinum nanoparticle at the center surrounded by Nafion polymer, water molecules, and hydronium ions at λ = 3, 6 ...


Multi-Scale Models For Sulfonated Cross-Linked Poly (1, 3-Cyclohexadiene) Polymer, Qifei Wang, David Keffer, Suxiang Deng, Jimmy Mays 2012 University of Tennessee - Knoxville

Multi-Scale Models For Sulfonated Cross-Linked Poly (1, 3-Cyclohexadiene) Polymer, Qifei Wang, David Keffer, Suxiang Deng, Jimmy Mays

David Keffer

Atomistic and coarse-grained (CG) models of cross-linked sulfonated Poly (1, 3-cyclohexadiene) (xsPCHD) were developed and implemented in Molecular Dynamics (MD) simulations of PCHD chains with different architectures. In the atomistic model, PCHD chains are cross linked by a sulfur–sulfur bond. Sulfonic acid groups are evenly distributed along the chain. The architecture is specifically aimed for application as a proton exchange membrane used in fuel cells. An atomistic force field for this architecture was tested and applied in the atomistic MD simulation of xsPCHD for the first time. The atomistic simulations generate the density and cross-linker separation distribution. To further ...


Carbon Nanotubes Grown On Glass Fiber As A Strain Sensor For Real Time Structural Health Monitoring, Matthew Boehle, Qiong Jiang, Lingchuan Li, Alexandre Lagounov, Khalid Lafdi 2012 University of Dayton

Carbon Nanotubes Grown On Glass Fiber As A Strain Sensor For Real Time Structural Health Monitoring, Matthew Boehle, Qiong Jiang, Lingchuan Li, Alexandre Lagounov, Khalid Lafdi

Chemical and Materials Engineering Faculty Publications

In order to more effectively monitor the health of composite structures, a fuzzy fiber sensor has been developed. The fuzzy fiber is a bundle of glass fibers with carbon nanotubes or nanofibers (CNTs or CNFs) grown on the surface. The nanotube coating makes the fiber bundle conductive while the small conductive path increases sensitivity. The fuzzy fiber sensor can replace conventional metal foil strain gauges in composite applications. The electrical response of the sensor is monitored in real time to measure strain, vibration, cracking and delamination. Continuous monitoring provides instant notification of any problems. Implementation of this sensor network in ...


An Examination Of The Thermodynamics Of Fusion, Vaporization, And Sublimation Of (R,S)- And (R)-Flurbiprofen By Correlation Gas Chromatography, Patamaporn Umnahanant, Darrell Hasty, James Chickos 2012 University of Missouri–St. Louis

An Examination Of The Thermodynamics Of Fusion, Vaporization, And Sublimation Of (R,S)- And (R)-Flurbiprofen By Correlation Gas Chromatography, Patamaporn Umnahanant, Darrell Hasty, James Chickos

James Chickos

No abstract provided.


Synergic Adsorption In The Simultaneous Removal Of Acid Blue 25 And Heavy Metals From Water Using A Ca(Po3)2-Modified Carbon, Rigoberto Tovar-Gomez, Dulce Rivera-Ramirez, Virginia Hernandez-Montoya, Adrian Bonilla-Petriciolet, Carlos Duran-Valle, Miguel A. Montes-Moran 2012 Instituto Tecnológico de Aguascalientes

Synergic Adsorption In The Simultaneous Removal Of Acid Blue 25 And Heavy Metals From Water Using A Ca(Po3)2-Modified Carbon, Rigoberto Tovar-Gomez, Dulce Rivera-Ramirez, Virginia Hernandez-Montoya, Adrian Bonilla-Petriciolet, Carlos Duran-Valle, Miguel A. Montes-Moran

Adrian Bonilla-Petriciolet

We report the simultaneous adsorption of acid blue 25 dye (AB25) and heavy metals (Zn2+, Ni2+ and Cd2+) on a low-cost activated carbon, whose adsorption properties have been improved via a surface chemistry modification using a calcium solution extracted from egg shell wastes. Specifically, we have studied the removal performance of this adsorbent using the binary aqueous systems: AB25 - Cd2+, AB25 - Ni2+ and AB25 - Zn2+. Multi-component kinetic and equilibrium experiments have been performed and used to identify and characterize the synergic adsorption in the simultaneous removal of these pollutants. Our results show that the presence of AB25 significantly favors the ...


Optimizing The Removal Of Fluoride From Water Using New Carbons Obtained By Modification Of Nut Shell With A Calcium Solution From Egg Shell, Virginia Hernandez-Montoya, Luis A. Ramirez-Montoya, Adrian Bonilla-Petriciolet, Miguel A. Montes-Moran 2012 Instituto Tecnológico de Aguascalientes

Optimizing The Removal Of Fluoride From Water Using New Carbons Obtained By Modification Of Nut Shell With A Calcium Solution From Egg Shell, Virginia Hernandez-Montoya, Luis A. Ramirez-Montoya, Adrian Bonilla-Petriciolet, Miguel A. Montes-Moran

Adrian Bonilla-Petriciolet

Carbons loaded with specific chemical moieties were prepared from pecan nut shells employing a natural modifier agent obtained from egg shell, which is rich in calcium, for the selective adsorption of fluoride from water. A L4 orthogonal array of the Taguchi method was used to optimize the synthesis conditions for obtaining these selective carbons. The samples obtained were characterized and the elemental composition, textural parameters and morphology were determined. Fluoride adsorption experiments were performed in synthetic and real groundwater samples. Results showed that carbons obtained from pecan nut shells modified with a calcium solution extracted from egg shells (CMPNS) were ...


Global Gibbs Free Energy Minimization In Reactive Systems Via Harmony Search, Adrian Bonilla-Petriciolet, Ma. del Rosario Moreno-Virgen, Juan Jose Soto-Bernal 2012 Instituto Tecnológico de Aguascalientes

Global Gibbs Free Energy Minimization In Reactive Systems Via Harmony Search, Adrian Bonilla-Petriciolet, Ma. Del Rosario Moreno-Virgen, Juan Jose Soto-Bernal

Adrian Bonilla-Petriciolet

Phase equilibrium calculations in systems subject to chemical reactions play a major role in the design of reactive separation schemes including chemical reaction engineering. Basically, these calculations involve the global minimization of Gibbs free energy constrained by the material balances and chemical equilibrium restrictions. However, Gibbs free energy function is non-convex, highly non-linear with many decision variables, and may have several local minimums including trivial and nonphysical solutions. In these conditions, conventional numerical methods are not suitable for solving reactive phase equilibrium problems. Recently, there has been a significant and increasing interest in the development of global strategies for reliably ...


Analysis And Prediction Of Input Multiplicity For The Reactive Flash Separation Using Reaction-Invariant Composition Variables, Jose E. Jaime-Leal, Adrian Bonilla-Petriciolet, Juan Gabriel Segovia-Hernandez, Salvador Hernandez, Hector Hernandez-Escoto 2012 Universidad de Guanajuato

Analysis And Prediction Of Input Multiplicity For The Reactive Flash Separation Using Reaction-Invariant Composition Variables, Jose E. Jaime-Leal, Adrian Bonilla-Petriciolet, Juan Gabriel Segovia-Hernandez, Salvador Hernandez, Hector Hernandez-Escoto

Adrian Bonilla-Petriciolet

In this study, we introduce a new approach for predicting and analyzing the input multiplicity in reactive flash separation processes. Specifically, we have identified necessary conditions to detect these multiple states in reactive flash separations using reaction-invariant composition variables. The presence of the input multiplicity is studied for the reactive systems of MTBE and TAME production to illustrate the capabilities of our methodology. For these reactive systems, we report the existence of multiple states for different operating conditions. In summary, our strategy can be applied with any reactive system and thermodynamic model, assuming that all reactions are reversible and in ...


Competitive Sorption Of Pb, Cd And Ni From Binary Aqueous Solutions By Chicken Feathers, Hilda Elizabeth Reynel-Avila, Adrian Bonilla-Petriciolet, Guadalupe de la Rosa 2012 Universidad de Guanajuato

Competitive Sorption Of Pb, Cd And Ni From Binary Aqueous Solutions By Chicken Feathers, Hilda Elizabeth Reynel-Avila, Adrian Bonilla-Petriciolet, Guadalupe De La Rosa

Adrian Bonilla-Petriciolet

In this paper, we report the competitive removal of Pb, Cd and Ni ions from binary metal solutions using chicken feathers. These heavy metals are very toxic for human being and are present in wastewaters of several industrial activities. Therefore, multi-component sorption studies are required to identify the capabilities and limitations of chicken feathers as low-cost sorbent for the simultaneous removal of these metal ions from wastewaters. To the best of our knowledge, sorption equilibrium studies involving chicken feathers and Pb, Cd and Ni in binary aqueous solutions have not been reported. Therefore, the binary sorption data for systems Pb ...


Multiobjective Optimization In Distillation With Reactor-Side For Hydrodesulfurization Process Of Diesel, Erick Y. Miranda-Galindo, Juan G. Segovia-Hernandez, Salvador Hernandez-Castro, Adrian Bonilla-Petriciolet, Gade Pandu Rangaiah 2012 Universidad de Guanajuato

Multiobjective Optimization In Distillation With Reactor-Side For Hydrodesulfurization Process Of Diesel, Erick Y. Miranda-Galindo, Juan G. Segovia-Hernandez, Salvador Hernandez-Castro, Adrian Bonilla-Petriciolet, Gade Pandu Rangaiah

Adrian Bonilla-Petriciolet

The distillation reactor-side has been proposed to remove sulfur compounds of diesel. The design and optimization of a hydrodesulfurization process involve the selection of the configuration and the operating conditions to minimize the total annual cost, CO2 emissions and the amount of sulfur compounds. In general, the optimal design of hydrodesulfurization process is a highly non-linear and multivariable multiobjective optimization problem, with the presence of both continuous and discontinuous design variables. In particular, stochastic multiobjective optimization algorithms are capable of solving, robustly and efficiently, challenging optimization problems, and they appear to be a suitable alternative for the design and optimization ...


Applications Of Activated Carbons Obtained From Lignocellulosic Materials For The Wastewater Treatment, Ma. del Rosario Moreno-Virgen, Rigoberto Tovar-Gomez, Didilia I. Mendoza-Castillo, Adrian Bonilla-Petriciolet 2012 Instituto Tecnológico de Aguascalientes

Applications Of Activated Carbons Obtained From Lignocellulosic Materials For The Wastewater Treatment, Ma. Del Rosario Moreno-Virgen, Rigoberto Tovar-Gomez, Didilia I. Mendoza-Castillo, Adrian Bonilla-Petriciolet

Adrian Bonilla-Petriciolet

This chapter provides an overview of the application of activated carbons obtained from lignocellulosic precursors for wastewater treatment. Analysis and discussion are focused on the performance of different activated carbons obtained from several precursors and their advantages and capabilities for the removal of relevant toxic compounds and pollutants from water.


Purification Of Bioethanol Using Extractive Batch Distillation: Simulation And Experimental Studies, Juan Angel Pacheco-Basulto, Diego Hernandez-McConville, Fabricio Omar Barroso-Muñoz, Salvardor Hernandez, Juan Gabriel Segovia-Hernandez, Agustin Jaime Castro-Montoya, Adrian Bonilla-Petriciolet 2012 Universidad de Guanajuato

Purification Of Bioethanol Using Extractive Batch Distillation: Simulation And Experimental Studies, Juan Angel Pacheco-Basulto, Diego Hernandez-Mcconville, Fabricio Omar Barroso-Muñoz, Salvardor Hernandez, Juan Gabriel Segovia-Hernandez, Agustin Jaime Castro-Montoya, Adrian Bonilla-Petriciolet

Adrian Bonilla-Petriciolet

Among biofuels, bioethanol has increased in importance in many countries because it can be used directly or mixed with gasoline in combustion engines. The production of bioethanol in a fermentative process usually gives a dilute solution from which the bioethanol must be obtained in high concentration in order to be used as biofuel. The separation of an azeotropic mixture of ethanol and water using batch and semi-batch distillation was studied considering ethylene glycol and ionic liquids as entrainers. The simulation and experimental results indicate that the separation is favored using ethylene glycol in comparison to the use of ionic liquid ...


Evaluation Of Covariance Matrix Adaptation Evolution Strategy, Shuffled Complex Evolution And Firefly Algorithms For Phase Stability, Phase Equilibrium And Chemical Equilibrium Problems, Seif-Eddeen Fateen, Adrian Bonilla-Petriciolet, Gade Pandu Rangaiah 2012 Cairo University

Evaluation Of Covariance Matrix Adaptation Evolution Strategy, Shuffled Complex Evolution And Firefly Algorithms For Phase Stability, Phase Equilibrium And Chemical Equilibrium Problems, Seif-Eddeen Fateen, Adrian Bonilla-Petriciolet, Gade Pandu Rangaiah

Adrian Bonilla-Petriciolet

Phase equilibrium calculations and phase stability analysis of reactive and non-reactive systems play a significant role in the simulation, design and optimization of reaction and separation processes in chemical engineering. These challenging problems, which are often multivariable and non-convex, require global optimization methods for solving them. Stochastic global optimization algorithms have shown promise in providing reliable and efficient solutions for these thermodynamic problems. In this study, we evaluate three alternative global optimization algorithms for phase and chemical equilibrium calculations, namely, Covariant Matrix Adaptation-Evolution Strategy (CMA-ES), Shuffled Complex Evolution (SCE) and Firefly Algorithm (FA). The performance of these three stochastic algorithms ...


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