Multiphase equilibria modeling of bio-oil related mixtures with GCA-EO

FRANCISCO A. SÁNCHEZ; SELVA PEREDA; M. NICOLAUS J. DAHMEN; YANNIK H. ILLE

Villa Carlos Paz, Córdoba

Conferencia; XI Iberoamerican Conference on Phase Equilibria and Fluid Properties for Process Design (EQUIFASE 2018); 2018

IPQA - UNC-CONICET

In the last years, bio-oils produced from fast pyrolysis have become an attractive alternative to produce intermediate chemicals in biofuels production from lignocellulosic residues. Fast pyrolysis transforms solid organic feedstocks, in absence of oxygen, into a mixture of liquid, gas and solid products at high temperatures, usually around 500 °C[1]. The liquid condensate, namely bio-oil, is a dark viscous fluid composed by several hundreds of compounds derived from the degradation of lignocellulosic materials [2]. To our knowledge, there is no binary experimental data of most of the compounds comprising bio-oil. Very often, not even pure compound data is available. In this context, the well-known group contribution approach allows predicting phase behavior of chemical compounds by modeling similar substances assembled by the same groups. In this regard, the GCA-EOS [3] is a reliable model with an extensive table of parameters, which has been already extended to mixtures of aliphatic and aromatic hydrocarbons with ketones [4], alcohols and water [5], furans [6], and phenols [7]. In this work, we propose a parameterization to assess the GCA-EOS interaction parameters needed to model the phase equilibria of the aromatic oxygenates present in pyrolysis bio-oils of lignocellulosic biomass.