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. However,...
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 silicas...
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 cathode...
Published: 5/1/2013   |   Inventor(s): J. Kenneth Wittle, Sibel Pamukcu
Keywords(s): Environmental Remediation, Waste Product Removal
Category(s): Energy and Environment
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 synthesis...
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
Carbon Dioxide Capture
SUMMARY Lehigh University has developed a new class of porous organonitridic materials (PECONFs) with an attractive combination of characteristics for gas separation, including removing carbon dioxide from flue gas. The materials adsorb high amounts of CO2 (up to 3.5 mmol.g-1 at 1 atm and 273 K) and exhibit high selectivities (CO2 : N2 = 109) and heats...
Published: 3/9/2011   |   Inventor(s): Kai Landskron, Paritosh Mohanty
Category(s): Energy and Environment
Microreactor to Produce Hydrogen (Technology #: 121903-01)
SUMMARY Lehigh University has developed a microreactor for carrying out methanol reforming for hydrogen production. The microreactor has parallel micro-channels with a particle filter fabricated on a silicon substrate. This allows for on-chip heating and temperature sensing, trapping of catalyst particles, flow distribution, microfluidic interfacing...
Published: 4/22/2009   |   Inventor(s): Mayuresh Kothare, Ashish Pattekar
Keywords(s): Fuel Cell, Microreactor, Power
Category(s): Energy and Environment
Method and Apparatus for Characterizing Coal Tar in Soil
SUMMARY The present invention provides a method and apparatus or system for determining an amount of coal tar that can enter, and subsequently be displaced from, a given type of soil for a range of depths of the soil. The method and apparatus also provide verification of the pressure at which coal tar can be displaced from a given type of soil. In particular,...
Published: 4/6/2009   |   Inventor(s): Derick Brown, Horace Moo-Young
Keywords(s): Soil Treatment
Category(s): Energy and Environment
Use of Soy Proteins or Soy Derivatives and Zero-Valent Iron for Environmental Remediation
SUMMARY Lehigh has developed a novel material for the treatment of contaminated water and soil. The method for the preparation of such materials involves the dispersion of zero-valance nanoscale iron particles and use of either soy protein, soy milk, or other soy derivatives. These particles have large surface areas, giving them increased reactivity...
Published: 4/2/2009   |   Inventor(s): Wei-Xian Zhang
Keywords(s): Environmental Remediation, Nanotechnology, Pollution Control, Water Treatment
Category(s): Energy and Environment
Periodic Mesoporous Phosphorous (V)-oxyimide
SUMMARY Stishovite is the hardest oxide material known and because it is an oxide, it is resistant to corrosion. It can be incorporated into machine tools for processes such as cutting and grinding, and can be used for polishing applications. However, the cost of making Stishovite has inhibiting greater adoption. Lehigh University has addressed this...
Published: 3/27/2009   |   Inventor(s): Kai Landskron, Paritosh Mohanty
Keywords(s): Nanocasting, Nanotechnology, Periodic Mesoporosity
Category(s): Energy and Environment
Dispersed Zero-Valent Iron Colloids
SUMMARY Stable dispersions of zero-valent iron particles are produced by milling of micro- and nano-scale iron particles (colloids) in the presence of a dispersant or dispersants. The present invention is a process for preparing zero-valent iron suspensions which can be used directly at the source of the pollution, applied to deep aquifers, and spread...
Published: 3/16/2009   |   Inventor(s): Wei-Xian Zhang
Keywords(s): Environmental Remediation, Nanotechnology, Water Treatment
Category(s): Energy and Environment
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