An Analysis of a New Approach to Sol-gel Synthesis: The Reaction of Formic Acid with Teos

An Analysis of a New Approach to Sol-gel Synthesis: The Reaction of Formic Acid with Teos

Abstract :-
FTIR spectroscopy was investigated as a means of monitoring the reactions of formic acid and tetraethoxy silane, TEOS, at different temperatures and molar ratios of formic acid to TEOS, r. FTIR spectra of the reactions at r values of 1, 2, and 6 showed that increasing the molar ratio and temperature significantly increased the rates of hydrolysis and condensation. An activation energy of 10.5 0.6 kcal/mole was determined for the r= 6 system. 29Si NMR was used to monitor the reaction of formic acid with TEOS at molar ratios of 1, 2, and 6. The increase in reaction rate with increasing molar ratio was clearly evident in the silica NMR spectra. Continue reading An Analysis of a New Approach to Sol-gel Synthesis: The Reaction of Formic Acid with Teos

Analysis of Air Quality with Numerical Simulation (CMAQ), and Observations of Trace Gases

Analysis of Air Quality with Numerical Simulation (CMAQ), and Observations of Trace Gases

Abstract :-
Ozone, a secondary pollutant, is a strong oxidant that can pose a risk to human health. It is formed from a complex set of photochemical reactions involving nitrogen oxides (NOx) and volatile organic compounds (VOCs). Ambient measurements and air quality modeling of ozone and its precursors are important tools for support of regulatory decisions, and analyzing atmospheric chemical and physical processes. I worked on three methods to improve our understanding of photochemical ozone production in the Eastern U.S.: a new detector for NO2, a numerical experiment to test the sensitivity to the timing to emissions, and comparison of modeled and observed vertical profiles of CO and ozone. Continue reading Analysis of Air Quality with Numerical Simulation (CMAQ), and Observations of Trace Gases

Adsorption Humidity Effects, Microparticle Rate Behavior and Thermal Swing Adsorption

Abstract :-
Application of adsorption processes for air purification requires an approach, which accounts for the presence of humidity. Four separate but related studies are conducted to examine the adsorption processes. A new pure component adsorption isotherm is developed to describe Type 5 adsorption. The results are used to correlate data of water on activated carbon. Continue reading Adsorption Humidity Effects, Microparticle Rate Behavior and Thermal Swing Adsorption