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Full-Text Articles in Chemical Engineering
A Combined Electrochemical-Biological System For The Production Of Liquid Fuel From Co2, Elizabeth Hann
A Combined Electrochemical-Biological System For The Production Of Liquid Fuel From Co2, Elizabeth Hann
Link Foundation Energy Fellowship Reports
Biological photosynthesis is the origin of our liquid transportation fuels, from petroleum to corn ethanol. Biological photosynthesis has an efficiency of approximately 1% for the conversion of photons from sunlight to biomass1. Increasing the energy efficiency of biomass production (solar-to-biomass conversion) would allow for biomass, and biofuels, to be produced using less resources. Artificial photosynthesis seeks to overcome the limitations of biological photosynthesis, including low efficiency of solar energy capture and poor carbon dioxide reduction, and could provide an alternative route for biomass production. A two-step electrochemical process converts CO2 to acetate. Acetate is a soluble, two-carbon substrate that can …
Towards More Stable And Ion-Conductive Organic Electrolytes For Rechargeable Batteries, Shuting Feng
Towards More Stable And Ion-Conductive Organic Electrolytes For Rechargeable Batteries, Shuting Feng
Link Foundation Energy Fellowship Reports
The global society urgently needs to remedy the effects of climate change resulting from burning fossil fuels and significantly increase the utilization of renewable energy. Rechargeable batteries are important enablers of sustainable energy use, as they can be employed to store energy generated from renewable but intermittent source. Enhancing the functionality of battery electrolytes, such as (electro)chemical stability and ion conductivity, can improve battery energy density, operation efficiency, and safety. This project explores strategies to improve the stability and ion conductivity of organic electrolytes for rechargeable batteries. Special attention is given to aprotic lithium-oxygen (Li-O2) batteries, which offer theoretical energy …
Pressure Swing Adsorption Separation Of H2s/Co2/Ch4 Gas Mixtures With Molecular Sieves 4a, 5a, And 13x, Howell H. Heck, Merilyn L. Hall, Rudy Dos Santos, Manolis M. Tomadakis
Pressure Swing Adsorption Separation Of H2s/Co2/Ch4 Gas Mixtures With Molecular Sieves 4a, 5a, And 13x, Howell H. Heck, Merilyn L. Hall, Rudy Dos Santos, Manolis M. Tomadakis
Mechanical and Civil Engineering Faculty Publications
Pressure swing adsorption experiments were carried out for the separation of equimolar mixtures of carbon dioxide and methane containing small amounts of hydrogen sulfide, utilizing 4A, 5A, and 13X molecular sieves. High-purity methane of zero or nearly zero hydrogen sulfide concentration was produced in the adsorption stage with 13X and 5A sieves, at high product recovery rates; high-purity carbon dioxide was obtained with the same sieves in the desorption stage. Zeolite 4A was found capable of raising considerably the hydrogen sulfide concentration in the accumulated desorption product (vs. the adsorption feed) at high recovery rates too. Adsorption selectivity values derived …
Link Foundation Fellowship Report, Elisabeth A. Gilmore
Link Foundation Fellowship Report, Elisabeth A. Gilmore
Link Foundation Energy Fellowship Reports
Peak hour electricity demand is associated with wholesale electricity prices that are sometimes more than 10 times higher than in off-peak periods. During these high-demand periods congested transmission lines and insufficient generation capacity can lead to brownouts and blackouts. This problem can be especially acute in urban centers. One way to alleviate this problem is to build new peaking plants. We investigated the costs and benefits, including expenditures and adverse health effects, of using existing backup generators and battery based electrical storage facilities to meet peak load demands rather than investing in a new power plant. Using small-scale generation located …
Evaluation And Engineering Of Saccharomyces Cerevisiae For Cellulase Expression And Growth On Insoluble Cellulose, John Mcbride
Evaluation And Engineering Of Saccharomyces Cerevisiae For Cellulase Expression And Growth On Insoluble Cellulose, John Mcbride
Link Foundation Energy Fellowship Reports
The conversion of cellulosic biomass into fuels and chemicals promises to be a major revolution for the United States economy, but is dependent on the advancement of low-cost conversion technology. Of the natural resources available to human societies, biomass is one of the most abundant, and is the sole sustainable source of organic fuels, chemicals, and materials [1]. Biomass derived fuels and chemicals can achieve net zero carbon emissions on a lifecycle basis, provide substantial income to rural communities, and eliminate the security issues associated with fossil resources. Cellulosic biomass (wood, grass, agricultural residues, etc.) can be produced cheaply and …
Hydrazine/Nitrogen Dioxide Fiber Optic Sensor, Alfred S. Andrawis, Josephine B. Santiago, Rebecca Young, Clayton J. Baum
Hydrazine/Nitrogen Dioxide Fiber Optic Sensor, Alfred S. Andrawis, Josephine B. Santiago, Rebecca Young, Clayton J. Baum
Chemistry and Chemical Engineering Faculty Publications
This paper outlines the development of a dual hydrazine/nitrogen dioxide (HZ/NO2) prototype fiber optic sensor utilizing an acid-base indicator that undergoes color changes depending on which gas is present. Bromothymol blue bromocresol green mixture (1/1) in hydrogel (1/1), produces a blue-green indicator for HZ and/or NO2. The sensor was tested several times over a period of eight weeks and the response was consistent and proved the feasibility of dual HZ/NO2 leak detection. Prototype sensor construction, the hardware, and the software of the electronic interrogator circuitry are briefly explained. The paper presents a summary of sensor response when exposed to 52 …