Abstract
Syngas from gasification contains heavy aromatic hydrocarbons, which must be removed because of condensation hazards. This work addresses the sorption of toluene and naphthalene in cross-linked poly(dimethylsiloxane) to explore the potential of vapor permeation to clean syngas. This topic is unusual for permeation in terms of temperature and heavy vapors and has never been investigated. The sorption of pure hydrocarbons was studied with vapor and liquid over the entire range of activities. The sorption of their mixtures was also investigated to explore synergetic effects. It was shown that the solubility of naphthalene is high and strongly variable with activity. However, the sorbed amounts of naphthalene were lower than those with toluene for the same activity. The isotherms were fitted with Flory–Huggins and ENSIC models. In the case of mixture sorption, strong coupling effects were revealed. A modified ENSIC model using a binary parameter of interaction between the hydrocarbons was developed to model t...
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