Abstract
Adsorption of phenol from a model fuel was firstly conducted over activated carbon (AC) and a typical porous metal-organic framework (MOF, MIL-101) in order to understand the possible application of MOFs in fuel purification. MIL-101 showed a remarkable phenol adsorption capacity (∼2.7 times that of AC) under the studied conditions. Moreover, the adsorption capacity enhanced further (up to ∼3.7 times of AC) after introduction of a hydroxyl group on the MOF (even though porosity of the MOF was decreased noticeably) by grafting ethanolamine (EA) on coordinatively unsaturated sites on MIL-101. The adsorption of phenol on EA-grafted MIL-101 (HO-MIL-101) is explained by H-bonding. Comparative adsorption of phenol and anisole on MIL-101 and HO-MIL-101 suggests that H-bonding occurs between the H-atom of the phenolic -OH and the O-atom of HO-MIL-101. HO-MIL-101 is recyclable after simple solvent washing, showing the potential application of MOFs, if suitably functionalized, for phenol adsorption/removal from fuel.
| Original language | English |
|---|---|
| Pages (from-to) | 43-48 |
| Number of pages | 6 |
| Journal | Fuel |
| Volume | 174 |
| DOIs | |
| State | Published - 15 Jun 2016 |
Keywords
- Adsorption
- Fuel
- H-bonding
- Metal-organic frameworks
- Phenol