Search Results - Energy and Environment

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Efficieny Droop Solution for High Power Nitride LEDs
SUMMARY One of the most important issues in InGaN quantum well LEDs in the reduction in efficiency at high current density, which is referred to as “efficiency-droop.” Various explanations for this include carrier leakage, auger recombination and decreased carrier localization at in-rich regions, hole transport, and junctions hearting. ...
Published: 10/1/2015   |   Inventor(s): Nelson Tansu, Hongping Zhao, Guangyu Liu, Ronald Arif
Category(s): Energy and Environment
Synthesis of a Large Pore Periodic Mesoporous Slicas with Crystalline Channel Walls at Pressures <5 GPa
SUMMARYPeriodic mesoporous silica materials were first discovered by Mobil Oil in 1992 for use in petroleum cracking applications. It was envisaged that these larger pore materials would allow for a more effective processing of the heavier hydrocarbon molecules than microporous zeolite catalysts. However, this did not happen because the mesoporous ...
Published: 5/23/2014   |   Inventor(s): Kai Landskron
Category(s): Energy and Environment, Materials and Nanotechnology
Electrochemical System and Method for the Removal of Charged Species from Contaminated Liquid and Solid Wastes (Technology #: 041095-01)
SUMMARY An electrokinetic system and method are provided for removing charged species from a sample in which said charged species is commingled with at least one radionuclide. The apparatus comprises an anode compartment comprising an anode, a cathode compartment comprising a cathode, and a treatment zone in fluid communication with the anode and c...
Published: 5/1/2013   |   Inventor(s): J. Kenneth Wittle, Sibel Pamukcu
Keywords(s): Environmental Remediation, Waste Product Removal
Category(s): Energy and Environment
High-Yield Secretion System for Biosurfactant Production
SUMMARY Interest and use of surfactants has grown over the past 10 years, mainly due to the emergence of applications in biofuels, oil recovery and bioremediation. This has created a push towards green, biodegradable surfactants. However, large-scale biosurfactant production is limited due do a lack of understanding of both the identity and mechani...
Published: 11/6/2012   |   Inventor(s): Bryan Berger
Keywords(s): Biocompatible, Biosurfactant, Detergents, Green Synthesis, Sustainable Biomanufacturing
Category(s): Energy and Environment, Life Sciences
Improved Efficiency of Geothermal Ground Improvement System
SUMMARY Lehigh University has developed a method for constructing geothermal foundations to improve their efficiency. The innovation uses previous concrete pilings with integral open or closed loop geothermal heat exchangers for use in soft soil building foundations. These pilings will be shallower than those used for deep foundation heat exchang...
Published: 11/6/2012   |   Inventor(s): Muhannad Suleiman
Category(s): Energy and Environment
Internal Microlens Arrays Enhancing Performance of Dye Sensitized Solar Cells
SUMMARY Existing solar cell devices only control light outside of the device as a top-layer coating or solar collector. This invention from Lehigh University incorporates the lenses within the device itself. The microlens arrays redistribute the light internally and increase the exposed surface area associated with the dye support. This method fo...
Published: 11/6/2012   |   Inventor(s): James Gilchrist, Mark Snyder, Pisist Kumnorkaew
Keywords(s): Efficiency Enhancement, Electrical
Category(s): Electronics, Energy and Environment
Large Scale Thermal Energy Storage with Encapsulated Phase Change Materials
SUMMARY Lehigh University has developed a large scale thermal energy storage technology with encapsulated phase change materials (EPCMs). EPCMs offer a more promising alternative to storing energy with sensible heat, compressed air and other means. They can also be designed to have high melting points with constant temperature during a phase chan...
Published: 7/25/2012   |   Inventor(s): Sudhakar Neti, Wojciech Misiolek, Alparslan Oztekin, Kemal Tuzla, John Chen
Category(s): Energy and Environment
Autothermal Cycle for Co2 Capture
SUMMARY Lehigh University has developed a novel process for carbon capture. This process removes carbon dioxide from flue gas through beds containing adsorbent materials. Desorption is performed by passing steam through the beds creating a stream of carbon dioxide mixed with steam. This mixture is then compressed to condense the steam and move the ...
Published: 5/16/2012   |   Inventor(s): Hugo Caram
Category(s): Energy and Environment, Gas/Liquid Treatment, Chemicals & Materials Science
Facile, High Yield Synthesis and Purification of CdS Quantum Dots from Optimized Strains of S. maltophilia
SUMMARY A major barrier to the utilization of quantum dots (QDs) in commercial applications is the high cost associated with conventional chemical synthesis as well as the use of high temperatures and toxic solvents, thereby requiring specialized, expensive waste disposal procedures. Lehigh University has developed an optimized, bacterial-based syn...
Published: 8/26/2011   |   Inventor(s): Bryan Berger, Steven Mcintosh
Keywords(s): Efficiency Enhancement, Solid State Displays
Category(s): Energy and Environment, Materials and Nanotechnology, Optical Networking and Sensors, Electronics, Gas/Liquid Treatment
Supercapacitive Swing Adsorption
SUMMARY Lehigh University has developed a new approach to sorption based gas separation using supercapacitive swing adsorption (SSA). This approach is advantageous over traditional gas separation techniques as it avoids the need of pressure and temperature changes. Reusable supercapacitive energy is utilized to achieve gas separation suggesting sub...
Published: 6/14/2011   |   Inventor(s): Kai Landskron, David Moore, Nina Finamore Jarrah, Berenika Kokoszka, Cong Liu, Paritosh Mohanty
Category(s): Energy and Environment, Materials and Nanotechnology, Gas/Liquid Treatment
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