Petroleum Science >2015, Issue 2: 330-339 DOI: https://doi.org/10.1007/s12182-015-0020-2
Efficient desulfurization of gasoline fuel using ionic liquid extraction as a complementary process to adsorptivedesulfurization Open Access
文章信息
作者：N. Farzin Nejad and A. A. Miran Beigi
作者单位：
Petroleum Refining Technology Development Division, Research Institute of Petroleum Industry, 14857-33111 Tehran, Iran;Petroleum Refining Technology Development Division, Research Institute of Petroleum Industry, 14857-33111 Tehran, Iran
投稿时间：2014-07-18
引用方式：Farzin Nejad, N. & Miran Beigi, A.A. Pet. Sci. (2015) 12: 330. https://doi.org/10.1007/s12182-015-0020-2
文章摘要
The extractive desulfurization of a model gasoline
containing several alkyl thiols and aromatic thiophenic
compounds was investigated using two imidazolium-based
ionic liquids (ILs), 1-butyl-3-methylimidazolium tetrachloroaluminate,
and 1-octyl-3-methylimidazolium tetrafluoroborate,
as extractants. A fractional factorial design
of experiments was employed to evaluate the effects and
possible interactions of several process variables. Analysis
of variance tests indicated that the number of extraction steps
and the IL/gasoline volume ratio were of statistically highly
significant, but none of the interactions were significant. The
results showed that the desulfurization efficiency of the
model gasoline by the ILs could reach 95.2 % under the
optimal conditions. The optimized conditions were applied
to study the extraction of thiophenic compounds in model
gasoline and several real gasoline samples; the following
order was observed in their separation: benzothiophene[
thiophene[3-methylthiophene[2-methylthiophene,
with 96.1 % removal efficiency for benzothiophene.
The IL extraction was successfully applied as a complementary
process to the adsorptive desulfurization with activated
Raney nickel and acetonitrile solvent. The results
indicated that the adsorptive process combined with IL extraction
could provide high efficiency and selectivity, which
can be regarded as a promising energy efficient desulfurization
strategy for production of low-sulfur gasoline.
containing several alkyl thiols and aromatic thiophenic
compounds was investigated using two imidazolium-based
ionic liquids (ILs), 1-butyl-3-methylimidazolium tetrachloroaluminate,
and 1-octyl-3-methylimidazolium tetrafluoroborate,
as extractants. A fractional factorial design
of experiments was employed to evaluate the effects and
possible interactions of several process variables. Analysis
of variance tests indicated that the number of extraction steps
and the IL/gasoline volume ratio were of statistically highly
significant, but none of the interactions were significant. The
results showed that the desulfurization efficiency of the
model gasoline by the ILs could reach 95.2 % under the
optimal conditions. The optimized conditions were applied
to study the extraction of thiophenic compounds in model
gasoline and several real gasoline samples; the following
order was observed in their separation: benzothiophene[
thiophene[3-methylthiophene[2-methylthiophene,
with 96.1 % removal efficiency for benzothiophene.
The IL extraction was successfully applied as a complementary
process to the adsorptive desulfurization with activated
Raney nickel and acetonitrile solvent. The results
indicated that the adsorptive process combined with IL extraction
could provide high efficiency and selectivity, which
can be regarded as a promising energy efficient desulfurization
strategy for production of low-sulfur gasoline.
关键词
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Liquid–liquid extraction Experimentaldesign Adsorptive desulfurization Gasoline Thiopheniccompounds