3. Results and discussions
3.1
Effect of DESs on reaction time
The effects of ChCl-Pho (1:2), ChCl-TsOH (1:1), ChCl-BOA (1:2) and
ChCl-NH2OH•HCl (1:2) additives on the alkylate
components as a function of time were initially investigated, as shown
in Figure 2. At the initial time, the C9+ components are
relatively high with the low conversion of C8 key
components. With the extended reaction time, the RON and
C8 key components
increase gradually, and the LEs (C5-C7)
and C9+ components present a decreasing trend. The RON
and C8 approach a plateau basically after 15 min, as
same as the reaction time of H2SO4system without any additive (see Figure S1). Among the reaction, the
trimethylpentanes (TMPs) with higher RON (>100.0) grow in
pace with the C8 components, leading to the higher RON
of alkylate. Hence, the addition of DESs have no effect of the reaction
time of H2SO4 alkylation in contrast to
the pure H2SO4 system. The reaction time
of 15 min was taken for the following experiments.