4 Matching Results

Search Results

Advanced search parameters have been applied.
in creator/contributor: "Britt, P.F."  
Results: 1 - 4
open access

Influence of restricted diffusion on retrogressive free-radical reactions

Description: The effects of restricted mass transport on retrogressive reaction pathways can be probed through the study of model compounds immobilized on silica surfaces. Silica-immobilized bibenzyl undergoes a free radical chain rearrangement reaction that converts the thermally labile bibenzylic linkage into a more refractory diphenylmethane-type linkage. The efficiency of this process was found to be quite sensitive to the structure of neighboring molecules on the surface. Co-immobilized naphthalene was… more
Date: July 1, 1993
Creator: Buchanan, A. C.; Britt, P. F. III & Thomas, K. B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Impact of organic-mineral matter interactions on thermal reaction pathways for coal model compounds

Description: Coal is a complex, heterogeneous solid that includes interdispersed mineral matter. However, knowledge of organic-mineral matter interactions is embryonic, and the impact of these interactions on coal pyrolysis and liquefaction is incomplete. Clay minerals, for example, are known to be effective catalysts for organic reactions. Furthermore, clays such as montmorillonite have been proposed to be key catalysts in the thermal alteration of lignin into vitrinite during the coalification process. Re… more
Date: July 1, 1995
Creator: Buchanan, A. C., III; Britt, P. F. & Struss, J. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Development of a technique for mercury speciation and quantification using gas chromatography/mass spectrometry

Description: One element of concern to DOE is mercury. Mercury was used extensively at the DOE facilities in Oak Ridge, Tennessee from 1950 to 1963 in the process of making lithium deuteride, a component of nuclear weapons. Although both the inorganic and organometallic forms of mercury are toxic to humans, the organic compounds are often more toxic. Since the toxicity of mercury is a function of its chemical form, an understanding of the interactions between commercially discharged mercury, naturally occur… more
Date: July 1, 1997
Creator: Barshick, S. A.; Barshick, C. M.; Britt, P. F.; Vance, M. A. & Duckworth, D. C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Thermal reaction studies of organic model compound-mineral matter interactions in solids

Description: The solid-state chemistry of silica-immobilized phenethyl phenyl ethers is being investigated in the presence of interdispersed aluininosilicates at temperatures relevant to coal processing to gain a better understanding of the impact of mineral matter on pyrolysis and liquefaction mechanisms. Results demonstrate the dramatic effect that aluminosilicates can have in altering the normal thermal reaction pathways for these models of ether linkages in lignin and low rank coals. An investigation of… more
Date: July 1, 1995
Creator: Buchanan, A. C., III; Britt, P. F. & Thomas, K. B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
Back to Top of Screen