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in subjects: "Ethers"

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Catalysts for High Cetane Ethers as Diesel Fuels

A tungstena-zirconia (WZ) catalyst has been investigated for coupling methanol and isobutanol to unsymmetrical ethers, i.e. methyl isobutyl ether (MIBE) and compared with earlier studied sulfated-zirconia (SZ) and Nafion-H catalysts. In all cases, the ether synthesis mechanism is a dual site S{sub N}2 process involving competitive adsorption of reactants on proximal acid sites. At low reaction temperatures, methylisobutylether (MIBE) is the predominant product. However, at temperatures >135 … more

Date: March 1, 2003

Creator: Klier, Kamil; Herman, Richard G.; Kwon, Heock-Hoi; Shen, James G. C.; Ma, Qisheng; Hunsicker, Robert A. et al.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Optical and Microcantilever-Based Sensors for Real-Time In Situ Characterization of High-Level Waste

Fundamental research is being conducted to develop sensors for cesium and strontium that can be used in real-time to characterize high-level waste (HLW) process streams. Two fundamentally different approaches are being pursued, having in common the dependence on highly selective molecular recognition agents. In one approach, an array of chemically selective sensors with sensitive fluorescent probes to signal the presence of the constituent of interest will be coupled to fiber optics for remote … more

Date: June 1, 2003

Creator: Brown, Gilbert M. & Bryan, Samuel