a Reaction conditions: ChCl-Pho (1:2) concentration 1.0 wt%, stirring rate 3000 r/min, reaction time 20 min, volume ratio of H2SO4/hydrocarbon 1.5:1, volume ratio of I/O 12:1.
Furthermore, the difference of alkylate components and C8 components of H2SO4alkylation with ChCl-Pho (1:2) additive as a function of temperature. From Figure 4a, compared with the pure H2SO4 system at 281.2 K, the C8 contents and TMPs increase 9.27%, 11.15%, 11.57% and 9.71%, 9.42%, 11.89%, 12.59% and 11.11% at 281.2 K, 277.2 K, 274.2 K, and 273.2 K, respectively. In Figure 4b, 2,2,4-TMPs, 2,3,3-TMPs and 2,2,3-TMPs follow the similar trend as the C8components, which suggests the change of the reaction temperature mostly impacts on the TMP components with higher RON.