E-resources
-
Dagle, Vanessa Lebarbier; Lopez, Johnny Saavedra; Cooper, Alan; Luecke, Jon; Swita, Marie; Dagle, Robert A.; Gaspar, Daniel
Fuel, 10/2020, Volume: 277, Issue: CJournal Article
The ability to control the molecular structure (e.g., degree of branching) of iso-olefins produced from oligomerizing light olefins is a valuable tool for tuning the final compositions of hydrocarbon fuels and targeting specific fuel properties. In this study, we demonstrated that the degree of branching of iso-olefins obtained from butene oligomerization can be controlled by tuning process conditions (i.e., temperature, weight hourly space velocity WHSV, nature of butene feedstock) and by choosing the proper catalyst (i.e., Amberlyst-36 vs. Y/ZSM-22). We produced three types of iso-olefin mixtures: 1) a methyl-heptenes rich (74 wt%) mixture,2) dimethyl-hexenes rich (80–96 wt%) mixtures, and 3) highly branched (i.e., ≥3 methyl substitutions) iso-olefins rich (>50 wt%) mixtures. While dimethyl-hexenes are preferentially formed at lower temperatures (60–100 °C) and WHSV (i.e., 2 hr−1), methyl-heptenes are favorably produced at higher temperatures (>100 °C) and WHSVs (i.e., 7 hr−1) over Amberlyst-36. The use of either 1-butene or 2-butene as feedstock resulted in liquid products with similar branching because facile intramolecular isomerization occurs prior to oligomerization. The use of isobutylene feedstock forms a more branched olefin product. For each type of iso-olefins mixture, we determined fuel properties including research octane number (RON), motor octane number (MON), and octane sensitivity (S), which is the difference between RON and MON. We found that not only RON and MON but also S values increased with the degree of branching of these complex mixtures of iso-olefins. The highest RON of 99.7 and S value of 9.3 were obtained for a mixture of highly branched iso-olefins.
![loading ... loading ...](themes/default/img/ajax-loading.gif)
Shelf entry
Permalink
- URL:
Impact factor
Access to the JCR database is permitted only to users from Slovenia. Your current IP address is not on the list of IP addresses with access permission, and authentication with the relevant AAI accout is required.
Year | Impact factor | Edition | Category | Classification | ||||
---|---|---|---|---|---|---|---|---|
JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
Select the library membership card:
If the library membership card is not in the list,
add a new one.
DRS, in which the journal is indexed
Database name | Field | Year |
---|
Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
---|
Source: Personal bibliographies
and: SICRIS
The material is available in full text. If you wish to order the material anyway, click the Continue button.