Matches in SemOpenAlex for { <https://semopenalex.org/work/W4247726518> ?p ?o ?g. }
Showing items 1 to 67 of
67
with 100 items per page.
- W4247726518 abstract "Regarding PAH preparation, our efforts this quarter were directed at identifying the operating conditions in the laboratory furnace that clearly resolve primary devolatilization from secondary pyrolysis. In previous studies, pristine tars from primary devolatilization were prepared in the radiant coal flow experiment with a furnace length of only 5 cm. Tars at various extents of secondary pyrolysis were generated in a hot-zone of 12.5 cm. For this project we decided to try to prepare both kinds of PAH in the 12.5 cm hot zone. Preliminary screening surveys showed that, among the dime possible ways to compensate for the longer furnace tube, only lowering the fumace temperature is really effective. Lowering the loading from its already low value of 300 No./cm{sup 3} is inconsequential, and raising the gas velocity to lower residence times in the longer hot zones causes deposition problems. The coal jet undergoes the transition to turbulence in less than 12 cm for entrainment velocities greater than 1 cm/s. By the end of the quarter, it was clear that the best value for primary devolatilization studies will fall within the range of 1 150 to 1400 K. But at present we are still not completely satisfied with the resolution of primary devolatilization. As intended, the tars collected at short residence times are completely soluble in tetrahydrofuran (THF), indicating that no soot is present so no secondary pyrolysis has occurred. But at residence times long enough to attain ultimate primary devolatilization yields, some soot is present. We will make our final choice early in the next quarter, then begin to collect an inventory of primary devoatilization tars for subsequent detailed characterization." @default.
- W4247726518 created "2022-05-12" @default.
- W4247726518 creator A5006704743 @default.
- W4247726518 creator A5011795618 @default.
- W4247726518 creator A5022698328 @default.
- W4247726518 creator A5071857205 @default.
- W4247726518 date "1992-12-01" @default.
- W4247726518 modified "2023-09-25" @default.
- W4247726518 title "Nitration of polynuclear aromatic hydrocarbons in coal combustors and exhaust streams. Quarterly report, January 1, 1992--March 31, 1992" @default.
- W4247726518 doi "https://doi.org/10.2172/10156998" @default.
- W4247726518 hasPublicationYear "1992" @default.
- W4247726518 type Work @default.
- W4247726518 citedByCount "0" @default.
- W4247726518 crossrefType "report" @default.
- W4247726518 hasAuthorship W4247726518A5006704743 @default.
- W4247726518 hasAuthorship W4247726518A5011795618 @default.
- W4247726518 hasAuthorship W4247726518A5022698328 @default.
- W4247726518 hasAuthorship W4247726518A5071857205 @default.
- W4247726518 hasBestOaLocation W42477265183 @default.
- W4247726518 hasConcept C105923489 @default.
- W4247726518 hasConcept C121332964 @default.
- W4247726518 hasConcept C127313418 @default.
- W4247726518 hasConcept C178790620 @default.
- W4247726518 hasConcept C185592680 @default.
- W4247726518 hasConcept C187320778 @default.
- W4247726518 hasConcept C2775913793 @default.
- W4247726518 hasConcept C2775925408 @default.
- W4247726518 hasConcept C2776701986 @default.
- W4247726518 hasConcept C2777977315 @default.
- W4247726518 hasConcept C2780471494 @default.
- W4247726518 hasConcept C36759035 @default.
- W4247726518 hasConcept C44870925 @default.
- W4247726518 hasConcept C518851703 @default.
- W4247726518 hasConceptScore W4247726518C105923489 @default.
- W4247726518 hasConceptScore W4247726518C121332964 @default.
- W4247726518 hasConceptScore W4247726518C127313418 @default.
- W4247726518 hasConceptScore W4247726518C178790620 @default.
- W4247726518 hasConceptScore W4247726518C185592680 @default.
- W4247726518 hasConceptScore W4247726518C187320778 @default.
- W4247726518 hasConceptScore W4247726518C2775913793 @default.
- W4247726518 hasConceptScore W4247726518C2775925408 @default.
- W4247726518 hasConceptScore W4247726518C2776701986 @default.
- W4247726518 hasConceptScore W4247726518C2777977315 @default.
- W4247726518 hasConceptScore W4247726518C2780471494 @default.
- W4247726518 hasConceptScore W4247726518C36759035 @default.
- W4247726518 hasConceptScore W4247726518C44870925 @default.
- W4247726518 hasConceptScore W4247726518C518851703 @default.
- W4247726518 hasLocation W42477265181 @default.
- W4247726518 hasLocation W42477265182 @default.
- W4247726518 hasLocation W42477265183 @default.
- W4247726518 hasLocation W42477265184 @default.
- W4247726518 hasLocation W42477265185 @default.
- W4247726518 hasOpenAccess W4247726518 @default.
- W4247726518 hasPrimaryLocation W42477265181 @default.
- W4247726518 hasRelatedWork W2123485283 @default.
- W4247726518 hasRelatedWork W2139635698 @default.
- W4247726518 hasRelatedWork W2154314448 @default.
- W4247726518 hasRelatedWork W2262484462 @default.
- W4247726518 hasRelatedWork W2346126471 @default.
- W4247726518 hasRelatedWork W2369336543 @default.
- W4247726518 hasRelatedWork W2772122700 @default.
- W4247726518 hasRelatedWork W2883369302 @default.
- W4247726518 hasRelatedWork W2963221380 @default.
- W4247726518 hasRelatedWork W3215970509 @default.
- W4247726518 isParatext "false" @default.
- W4247726518 isRetracted "false" @default.
- W4247726518 workType "report" @default.