Radicals in carbonaceous residue deposited on mordenite from methanol

It is shown that control of the degree of coking can lead to the observation of hyperfine structures in the carbonaceous residues deposited from methanol over mordenite (H-MOR) at temperatures relevant to the conversion of methanol to hydrocarbons. EPR measurements of the catalyst samples at various times on stream have been recorded, with a rich hyperfine splitting pattern observed in the early stages of the reaction. Interpretation of the EPR data with the aid of density functional theoretical calculations has afforded the first definitive assignment of the radical cations formed in high temperature coke. The results detail a shortlist of six species: 2,3/2,6/2,7-dimethylnaphthalenium, 2,3,6-trimethylnaphthalenium, 2,3,6,7-tetramethylnaphthalenium, and anthracenium radical cations whose proton hyperfine splitting profiles match the experimental spectra; 2,3,6,7-tetramethylnaphthalenium showed the best agreement. The observation of these particular isomers of polymethylnaphthalene suggest the formation of more highly branched polyaromatic species is less likely within the confines of the H-MOR 12-membered ring channel. These radicals formed when the catalyst is active may constitute key intermediates in the conversion of methanol to light olefins

High activity cobalt based catalysts for the carbonylation of methanol

[Cp(*)Co(CO)2] in the presence of PEt3 and Mel catalyses the carbonylation of methanol with initial rates up to 44 mol dm-3 h-1 before decaying to a second catalytic phase with rates of 3 mol dm-3 h-1; [CoI(CO)2(PEt3)2], which is trigonal bipyramidal with axial PEt3 ligands, has been isolated from the final reaction solution.</p

The Crucible, 057

Presented by Illinois Wesleyan University’s School of Theatre Arts, February 21-26, 2017. The production was directed by Professor Thomas Quinn, and featured scenic designs by Professor Curtis Trout, lighting designs by Sunniva Holmlund ’17, sound designs by Dani Von Helms ’17, and costume designs by Connor Speck ’17. Set in a small Massachusetts town in 1692, Arthur Miller’s classic drama is a partially fictionalized account of the Salem witch trials that occurred during that period. Winning the Tony Award for Best Play in 1953, the piece is regarded as a central work in the canon of American drama