Chemical Engineering Practice

The Application of a Model Predictive Control-Based Approach to CO2 Capture Processes: Towards Operational Cost Minimisation

Oct 17, 2011

Alicia Arce

Amine-based chemisorption of CO 2 is a promising near term option for the decarbonisation of large, fixed-point CO 2 emission sources [1] . However, the operational expenditure (OPEX) associated with this technology imposes a significant energy penalty on the power plant. As it is the solvent which...

Liquid Fuel Production Using Solar-Thermal Energy: Process Development and Technoeconomic Evaluation

Oct 17, 2011

Christos Maravelias

We have previously described a novel solar-based concept for the production of methanol from carbon dioxide and water. This system applies concentrated solar energy to thermochemically reenergize CO 2 into CO, and then water-gas shift (WGS) to produce syngas (a mixture of CO and H 2 ) that is fed...

Planar Biomimetic Aquaporin-Incorporated Triblock Copolymer Membranes On Porous Solid Supports

Oct 16, 2011

Phuoc H.H. Duong

The aim of the present study was to demonstrate the preparation and characterization of planar biomimetic bacterial water-channel protein Aquaporin Z (AQPZ)-incorporated polymer membranes on porous solid substrates by vesicle spreading for water treatment. AQPZ -incorporated polymer vesicles were...

Kinetics of Tetra-n-Butylammonium Bromide + Hydrogen Semi-Clathrate Hydrate Formation

Oct 16, 2011

Cor Peters

Hydrogen (H 2 ) is regarded as a promising alternative to fossil fuels, because it offers a solution for three main global challenges: (i) reduction of greenhouse gas emissions, (ii) fulfillment of energy requirements, and (iii) reduction of local air pollution. However, due to the difficulty in...

Maskless Fabrication of Nanowells Using Chemically Reactive Colloids

Oct 16, 2011

Darrell Velegol

We describe a maskless process for the fabrication of nanowells on a silicon substrate using chemically reactive nanoparticles. Positively-charged amidine-functionalized polystyrene latex (APSL) colloids are adhered onto a silicon wafer, and hydrolysis of the particles' amidine groups generates...

Solubility of CO2 and H2 In PDMS and PEGDME At 25 – 120 Oc

Oct 16, 2011

Robert M. Enick

Advanced gasification power plants will employ the water-gas shift reaction to produce a high pressure gas-phase mixture containing CO 2 , H 2 and water. This shifted syngas mixture at elevated pressures provides ample driving force for the use of physical solvents that will selectively absorb, but...

Mechanistic Modeling of Fast Pyrolysis of Cellulose to Predict Bio-Oil Composition

Oct 16, 2011

Vinu Ravikrishnan

Fast pyrolysis, a potential strategy for the production of transportation fuels from biomass, involves a complex network of competing reactions, which result in the formation of bio-oil, non-condensable gaseous species, and solid char. Bio-oil is a mixture of anhydro sugars, furan derivatives, and...

Experimental Measurement of near-Field Capillary Interactions Between Rod-Like Particles

Oct 16, 2011

Lu Yao

Micrometer-sized cylinders at fluid interfaces self-assemble owing to capillary interactions, forming linear chains of particles joined end-to-end by ‘capillary bonds’. We measure the strength of these capillary bonds by a new experimental technique. We incorporate a magnetic cylinder within a self...

Catalytic Cracking of Oak Pyrolytic Vapors Via Bench-Scale In-Situ Fixed-Bed Catalysis

Oct 16, 2011

David J. Mihalcik

Pyrolysis oils derived from lignocellulosic feedstocks by way of fast pyrolysis offer the possibility of a distinct alternative to the use of petroleum-based fuels. However, an inherent drawback associated with pyrolysis oil its high oxygen content which is due to the nature of the lignocellulosic...

Water Mobility: A Bridge Between the Hofmeister Series and the Friction of Zwitterionic Surfaces In Aqueous Solutions

Oct 16, 2011

Yi He

In this work, we systematically studied the effects of ions in the Hofmeister series on the friction of zwitterionic surfaces with carboxybetaine self-assembled monolayers (CB-SAMs) as model surfaces using molecular dynamics simulations. The friction coefficients between two CB-SAM surfaces under...

Relating Surface Viscosity to Monolayer Packing In Model Phospholipid Films Using Active Microrheology

Oct 16, 2011

Prajnaparamita Dhar

The reorientation of a magnetic nickel nanorod placed at the air/phospholipid interface is used to calculate the surface viscosity of spread monolayers of phospholipids, dipalmitoyl phosphatidyl choline (DPPC) and dimyristoyl phosphatidyl ethanolamine (DMPE). While surface viscosity was found to...

The Design of Advanced Functional Membranes for Bioseparations

Oct 16, 2011

Scott M. Husson

Market demand is increasing rapidly for biotherapeutics such as recombinant proteins, monoclonal antibodies, viral vaccines and plasmid DNA. With the advent of molecular biotechnology and engineered cell lines, upstream production processes have made unprecedented progress in the last decade,...

Ionic Liquids: A Potential Role In the Sulfur Family of Thermochemical Cycles

Oct 16, 2011

Nick AuYeung

The Sulfur-family of thermochemical water splitting cycles has already been identified as an ideal application of ionic liquid solvents for SO 2 absorption. 1 Here, ionic liquids are proposed as suitable reaction media in both the Sulfur-Sulfur cycle (a new cycle based upon the Sulfur-Iodine Cycle...

Using Gas Sparger Models to Determine Mass Transfer Coefficients and Bubble Area for Fermentation

Oct 16, 2011

Anne Skaja Robinson

It is often challenging experimentally to determine the mass transfer area, a, in the constitutive equation for the rate of mass transfer, , where is the rate of mass transfer of component A between the phases and . Almost all experiments are designed to determine KMa ,which is an equipment...

Deepwater Drilling Regulations In the Gulf of Mexico

Oct 16, 2011

Ian Sutton

Deepwater Regulations in the Gulf of Mexico The Deepwater Horizon incident (DWH) of April 2010 led to many changes in deepwater operations in the Gulf of Mexico. Not the least of those changes were to do with regulations. In the three months following DWH two important changes to the regulatory...

Intentional Course Design and Outcomes Assessment - Shifting the Curve In Material and Energy Balances Course

Oct 16, 2011

Dr. Suzanne Kresta

Intentional Course Design and Outcomes Assessment Shifting the Curve in Material and Energy Balances Courses Inci Ayranci and Suzanne Kresta University of Alberta The common wisdom is that a bi-modal distribution in process analysis is ?normal?. As class sizes in second year chemical engineering at...

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