Design/Green Engineering

The Effects of Carbon-to-Oxygen Ratio Upon Supercritical Water Reformation for Hydrogen Production

Oct 19, 2011

Jared S. Bouquet

The Effects of Carbon-to-Oxygen ratio upon Supercritical Water Reformation for Hydrogen Production Jared Bouquet 1 , Ryan Tschannen 2 , Aaron Gonzales 2 , and Sunggyu Lee 2 1: Missouri University of Science and Technology, Rolla, MO 2: Ohio University, Athens, OH With the continually growing energy...

Change of Structure of Corncob with Dilute Acid and Lime Pretreatment and a Potential Process for Xylose Co-Production of Cellulosic Ethanol

Oct 19, 2011

Jihong Li

Degree of polymerization (DP) of cellulose is considered an important factor to effect on the conversion of Lignocellulose. The higher DP of cellulose, the more difficult conversion of lignocellulose is. In this study, corncobs were pretreated with dilute acid process for production of xylose, and...

Modified AnoporeTM Hybrid Membranes for the Microfiltration of Cellulose Acid Hydrolysis Mixtures

Oct 18, 2011

Yong-Hong Zhao

Three classes of nonfouling substances, poly[poly(ethylene glycol) methyl ether methacrylate] (POEM), poly(sulfobetaine methacrylate) (PSBMA), and perfluoroalkyl tagged poly(ethylene glycol) surfactants (fPEG), were covalently tethered onto the surface of Anopore TM membranes (nominal pore size 0.2...

An Osmotic Membrane Dehumidifier

Oct 17, 2011

Arthur S. Kesten

OSMOTIC MEMBRANE DEHUMIDIFIER It has long been known that relying on a vapor compression system to cool air down to the dew point in order to dehumidify is expensive to build and uses far too much energy to operate. The ability to dehumidify independently of cooling provides substantial advantage,...

Design Enhancements of a High Temperature, Ceramic Micro-Channel Heat Exchanger

Nov 9, 2010

Merrill Wilson

The recent developments in the energy and process industries have lead to more efficient, higher-temperature processes and compact equipment. By using small features such as micro-channels, pin fins or plate fins the length scale for which transport occurs is minimized and thus increases the heat...

Toward Low-Cost Fabrication of Microchannel Process Technologies – Cost Modeling for Manufacturing Development

Nov 8, 2010

Steven D. Leith

Chemical and energy conversion systems based on microchannel process technology (MPT) demonstrate high performance in applications in which rates are controlled by diffusive heat and mass transfer flux. MPT-based heat exchangers, absorbers/desorbers and chemical reactors all benefit from process...

Theoretical Screening Good Sorbents for CO2 Separation

Mar 23, 2010

Yuhua Duan

Carbon dioxide is the major product from coal combustion and is released into the air and causes global climate warming which we are facing today. Current technologies for capturing CO2 including solvent-based (amines) and CaO-based materials are still too energy intensive. Hence, there is critical...

Hybrid Membrane Absorption Process for Post Combustion CO2 Capture

Mar 23, 2010

S. James Zhou

Gas Technology Institute (GTI) and PoroGen Corporation are jointly developing a novel hybrid membrane – absorption process for pre- and post-combustion CO2 capture (Carbo-Lock™ process). The novel Carbo-Lock™ process combines advantageous features of both absorption and membrane processes to...

Stripper Configurations for CO2 Capture by Aqueous Amines

Mar 23, 2010

David H. Van Wagener

A monumental task for improving the feasibility of carbon capture from the flue gas of coal-fired power plants is reducing the total energy cost. A generic absorption/stripping process using an aqueous amine solvent would reduce the net power production of a coal-fired power plant by roughly 30%,...

Development of Freeze Granulated Oxygen Carriers for Chemical Looping Combustion of Solid Fuels

Mar 22, 2010

Yi Zhang

Real Time Detection of Gaseous Metal Contaminants in Coal Flue and Fuel Gas

Mar 21, 2010

Erik C. Rupp

The Integrated Gasification Combined Cycle (IGCC) is a promising technology for the future use of coal to provide energy. During this process, many of the trace elements present in coal are volatilized, and remain in the gas phase through the gas turbine, only to be released in the flue gas. Trace...

Modeling Mercury Chemistry in Coal-Fired Air Preheaters: Effects of Sulfur Trioxide and Surface Area

Mar 21, 2010

Brydger Van Otten

Mercury emissions from coal-fired power plants are a concern to both the state and federal governments in the U.S. US EPA had proposed to regulate mercury emissions from coal-fired power plants using the Clean Air Mercury Rule (CAMR). This two-phase program allowed trading of mercury emissions,...

Evaluation of Reaction Conversion and Energy Consumption During Biodiesel Production Using a High Shear Mixer Pilot Scale Reactor

Nov 11, 2009

Sipho Ndlela

Biodiesel is a renewable fuel that has the potential to lower vehicle sulfur emissions when used directly or in a blended form, and can be synthesized from fat and oil sources. These sources include refined vegetable oil, crude vegetable oil, waste oil, and animal fat. The two main reaction routes...

Determine the Efficiency of Air-Pollution Control Devices

May

2007

Environmental Management

Lewis S. Buchanan

Forbatch processes, use a surrogate feed stream to simulate the inlet conditions necessary for stack testing to demonstrate compliance.

Collect and Destroy Emissions Safely

May

2004

Environmental Management

Tony Ennis

Vent collection and destruction systems are complex, and their safety depends on the proper integration of the discrete elements. This article provides guidance on how to achieve that.

Nanomaterials: What are the Environmental and Health Impacts?

December

2008

Critical Issues

Nastassja Lewinski

As with previous emerging technologies, there have been uncertainties and concerns about the environmental and health risks associated with nanotechnology. This article reviews some of the ongoing efforts to better understand and characterize...

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