Abstract—Solid supported ionic liquid can provide high surface area for better CO
2 adsorption as well as reduces the amount of ionic liquid used for CO
2 absorption. In the present work, SiO
2 and Molecular Sieve were impregnated with 10wt% of [hmim][Tf
2N], and tested for CO
2 adsorption at 10-40 bar. From the screening process, 10%[hmim][Tf
2N]-Si was observed to give higher CO
2 adsorption compared to [hmim][Tf
2N]-MolSieve, and 10%[hmim][Tf
2N]-Si was selected for further investigation. The experiment was further investigated by measuring CO
2 adsorption at 25, 40, and 60 oC. using 10%[hmim][Tf
2N]-Si. The highest CO
2 captured showed by 10%[hmim][Tf
2N]-Si was at 298 K. The CO
2 adsorption was also modeled using Langmuir and Freundlich isotherms, and the adsorption was best fitted using Freundlich isotherm at 25
oC with 0.9813 R
2 value.
Index Terms—[hmim][Tf
2N], solid support ionic liquid, CO
2 adsorption, adsorption isotherm.
Md. Nurul Safiah and Bustam M. Azmi are with Chemical Engineering Department, Universiti Teknologi PETRONAS, 31750 Perak, Malaysia (e-mail: safiahdagang@gmail.com).
M. Yunus Normawati is with Fundamental and Applied Science Department, Universiti Teknologi PETRONAS, 31750 Perak, Malaysia (e-mail: normaw@petronas.com.my).
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Cite: Md. Nurul Safiah, Bustam M. Azmi, and M. Yunus Normawati, "CO2 Capture Using Silica and Molecular Sieve Impregnated with [hmim][Tf2N]," International Journal of Chemical Engineering and Applications vol. 5, no. 4 pp. 342-346, 2014.
