Matches in SemOpenAlex for { <https://semopenalex.org/work/W3178557> ?p ?o ?g. }
Showing items 1 to 65 of
65
with 100 items per page.
- W3178557 abstract "Asphaltene and preasphaltene data are presented to demonstrate the effect of temperature, pressure, and reducing gas composition on their hydrogen and phenolic content. The previous paper by Baltisberger showed how the hydrogen and phenolic content of the A and PA defined whether or not a coal derived product will be classified as such. The influence of processing parameters as discussed in this paper indicates that reduction in the number of phenolic functional groups and cracking are required to further convert asphaltene and preasphaltene material to distillates. That alcohol groups are present in aromatic bridging structures is indicated in the data in this report by the decreased MW of SR when processed with CO present since after hydrogenation an aliphatic bridge would cleave easier. The increased aliphatic hydrogen content in the asphaltene fraction when reacted with CO may also indicate that some alcohol groups were initially in the aromatic bridges. The presence of alcohol groups in long chain aliphatics is indicated because increased yields of long chain alkanes were observed when CO was present. The previous data have shown how operating conditions such as pressure and temperature affects the hydrogen content, phenolic content, and molecular weight range of asphaltene and preasphaltenemore » fractions. The effects are reflected similarly in individual MW fractions of both A and PA material. The presence of alcohol groups in original coal (both lignites and bituminous coals) is strongly suggested. The preferential reaction of these alcohol groups with CO gas (but not H/sub 2/) to increase the hydrogen content of the asphaltenes, to reduce the overall MW distribution of coal, and to increase yields of alkanes indicates the beneficial effects of CO as a reductant of these functional groups which are present in both lignites and bituminous coals. 20 references, 8 figures.« less" @default.
- W3178557 created "2016-06-24" @default.
- W3178557 creator A5011100474 @default.
- W3178557 creator A5022976585 @default.
- W3178557 creator A5042387074 @default.
- W3178557 creator A5051944937 @default.
- W3178557 date "1984-03-01" @default.
- W3178557 modified "2023-09-27" @default.
- W3178557 title "Changes in asphaltenes and preasphaltenes with reaction conditions and effects on coal structure" @default.
- W3178557 hasPublicationYear "1984" @default.
- W3178557 type Work @default.
- W3178557 sameAs 3178557 @default.
- W3178557 citedByCount "0" @default.
- W3178557 crossrefType "journal-article" @default.
- W3178557 hasAuthorship W3178557A5011100474 @default.
- W3178557 hasAuthorship W3178557A5022976585 @default.
- W3178557 hasAuthorship W3178557A5042387074 @default.
- W3178557 hasAuthorship W3178557A5051944937 @default.
- W3178557 hasConcept C127413603 @default.
- W3178557 hasConcept C149629883 @default.
- W3178557 hasConcept C178790620 @default.
- W3178557 hasConcept C185592680 @default.
- W3178557 hasConcept C204030448 @default.
- W3178557 hasConcept C2781066024 @default.
- W3178557 hasConcept C42360764 @default.
- W3178557 hasConcept C512968161 @default.
- W3178557 hasConcept C518851703 @default.
- W3178557 hasConcept C65324659 @default.
- W3178557 hasConceptScore W3178557C127413603 @default.
- W3178557 hasConceptScore W3178557C149629883 @default.
- W3178557 hasConceptScore W3178557C178790620 @default.
- W3178557 hasConceptScore W3178557C185592680 @default.
- W3178557 hasConceptScore W3178557C204030448 @default.
- W3178557 hasConceptScore W3178557C2781066024 @default.
- W3178557 hasConceptScore W3178557C42360764 @default.
- W3178557 hasConceptScore W3178557C512968161 @default.
- W3178557 hasConceptScore W3178557C518851703 @default.
- W3178557 hasConceptScore W3178557C65324659 @default.
- W3178557 hasLocation W31785571 @default.
- W3178557 hasOpenAccess W3178557 @default.
- W3178557 hasPrimaryLocation W31785571 @default.
- W3178557 hasRelatedWork W118424324 @default.
- W3178557 hasRelatedWork W166880251 @default.
- W3178557 hasRelatedWork W1983744587 @default.
- W3178557 hasRelatedWork W2055934567 @default.
- W3178557 hasRelatedWork W2063999776 @default.
- W3178557 hasRelatedWork W2064834421 @default.
- W3178557 hasRelatedWork W2515323268 @default.
- W3178557 hasRelatedWork W2531935658 @default.
- W3178557 hasRelatedWork W2797979627 @default.
- W3178557 hasRelatedWork W2803780352 @default.
- W3178557 hasRelatedWork W2906108983 @default.
- W3178557 hasRelatedWork W2915719542 @default.
- W3178557 hasRelatedWork W2915851149 @default.
- W3178557 hasRelatedWork W2916256458 @default.
- W3178557 hasRelatedWork W2917637577 @default.
- W3178557 hasRelatedWork W2966250475 @default.
- W3178557 hasRelatedWork W2986096829 @default.
- W3178557 hasRelatedWork W2986791248 @default.
- W3178557 hasRelatedWork W1968175527 @default.
- W3178557 hasRelatedWork W3082034192 @default.
- W3178557 isParatext "false" @default.
- W3178557 isRetracted "false" @default.
- W3178557 magId "3178557" @default.
- W3178557 workType "article" @default.