On Demand Conference Presentations

The Effect of Fly Ash From Different Coal Sources On the Reactivity of An Iron-Based Oxygen Carrier for Chemical Looping Combustion

Oct 17, 2011

Aurora M. Rubel

The University of Kentucky, Center for Applied Energy Research is investigating oxygen carriers (OC) for chemical looping combustion (CLC) with the goal of developing a pressurized chemical looping combustion/gasification process for generating electricity from coal. An important issue in the...

The Influence of Nickel Phosphide On the Fractional Catalytic Pyrolysis of Hybrid Poplar Wood

Oct 17, 2011

Foster Agblevor

The pyrolytic conversion of biomass to into liquid fuels has the potential to become drop-in transportation fuels if some of its negative attributes such as high total acid number (TAN), high viscosity, and poor storage stability are overcome. We investigated nickel phosphide supported on fluid...

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...

Flow and Transport Properties In High-Solids Biomass Slurries

Oct 17, 2011

James J. Lischeske

Economic biochemical conversion of cellulose to sugars necessitates minimal addition of water to biomass slurries during conversion, resulting in high-solids systems. The resulting slurries are effectively wet-granular materials. These materials presents difficulties for reactor engineering, as...

Kinetics Study of Furfural Production From Cellulosic Biomass

Oct 17, 2011

Taiying Zhang

Furfural is an important chemical and also a building block for production of drop-in hydrocarbon fuels and can be produced from cellulosic biomass such as woody crops and bagasse by hydrolysis and dehydration with mineral acids. However, furfural yields employing current technologies are limited...

Pyrolysis Vs. Gasification: Effect of Oxygen In Reaction Atmosphere On Biochar Properties

Oct 17, 2011

Catherine E. Brewer

Since biochar properties can vary widely depending on feedstock and processing conditions, making meaningful comparisons between biochar produced by different processes (pyrolysis, gasification, kiln carbonization) and at different locations can be difficult. Biochar characterization methods can...

Technoeconomic Analysis of Biomass Gasification System Utilizing Geothermal Energy for Processing

Oct 17, 2011

Song-Charng Kong

The use of biomass as a source of energy has been studied extensively inrecent years, and special attention has been paid to biomass gasification. In this study, ASPEN Plus is used to conduct technoeconomic analysis of a large biomass gasification system. A biorefinery scenario consisting of 2,000...

The Horizontal Ribbon Growth of Solar Silicon Crystals: Process Analysis, Stability, and Control

Oct 17, 2011

Parthiv Daggolu

Present-day photovoltaic technology is predominantly based on the fabrication of solar cells from silicon. The cost and efficiency of silicon-based solar cells depend primarily on the growth rate and degree of single-crystallinity attained by the growth process. Traditional silicon crystal growth...

Improving the Quality of Spent Mushroom Substrate (SMS) As Feedstock for Biorefineries

Oct 17, 2011

Maria Nydia Ruiz-Felix

In the current ecological climate there is a strong push to find a renewable energy resource to reduce the usage of fossil fuels which are depleting and are causing greenhouse gas emissions. Biorenewable materials, particularly lignocellulosic biomass, have received increased attention recently as...

Thermal Processing Techniques to Improve Metal Sulfide Mixed Alcohol Catalyst Performance

Oct 17, 2011

Jesse E. Hensley

Research over several decades by several institutions has shown that alkali-promoted metal sulfide catalysts are capable of producing mixed alcohols from syngas with high selectivity and yield. Unfortunately, process models suggest that syngas to mixed alcohol processes, and especially...

Direct Coupled Catalytic Upgrading of Multi-Stage Pyrolysis Bio-Oil Vapors

Oct 17, 2011

Shaolong Wan

A two-stage pyrolysis was conducted in this work. The purpose of the multiple stages is to provide a segregated product evolution in which the vapor products maybe be more selectively treated by catalysts to improve product quality and catalyst stability in comparison to one step pyrolysis in which...

Evaluation of Alternative Fuels to Replace Coal In Cement Manufacturing

Oct 17, 2011

Steve R. Duke

A multiyear DOE-supported study was completed to identify, determine, and understand fundamental burn characteristics and properties of alternative fuel sources to replace coal for energy generation, with emphasis on impacts in cement processing. Portland cement manufacturing involves the...

Pretreatment of Loblolly Pine for Fast Pyrolysis Via Torrefaction

Oct 17, 2011

Jiajia Meng

Topical 6: Lignocelluosics: Biorefineries and Sustainable Energy T6007 Thermalchemical Conversion I AIChE 2011, October 16~21, 2011 Minneapolis, MN Pretreatment of Loblolly Pine for Fast Pyrolysis via Torrefaction Jiajia Meng, David Tilotta, and Sunkyu Park* Department of Forest Biomaterials, North...

Computational Modeling and On-Sun Model Validation for a Multiple Tube Solar Reactor with Reflective Cavity Walls

Oct 17, 2011

Janna Martinek

A three-dimensional steady state computational fluid dynamics model is developed for a solar receiver consisting of a reflective cavity with a windowed aperture enclosing an array of five tubes. The computational model couples radiative transfer with fluid flow, heat transfer, mass transfer, and...

A Novel SHF Process for Conversion of AFEX-CS to Ethanol Featuring High Ethanol Productivity, Enzyme Recycling, and Yeast Cells Reuse

Oct 17, 2011

Venkatesh Balan

There are two major problems in current cellulosic ethanol production process: low ethanol productivity and high enzyme loading. Based on the current Separate Hydrolysis and Fermentation (SHF) process, it takes at least 96h to perform enzymatic hydrolysis to convert AFEX-CS to fermentable sugars at...

A Novel Method to Harvest Microalgae Via Fungal Pelletization

Oct 17, 2011

Jianguo Zhang

Microalgae harvest contributes a large portion of cost for microalgae-to-biofuels production. Most current harvest technologies including chemical and mechanical methods are only economically feasible for production of high-value products due to the costs. In this work, we are describing a new...

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