The feasibility of a novel multivessel batch distillation–decanter hybrid for simultaneous separation of ternary heterogeneous azeotropic mixtures is addressed both theoretically and by simulations. The multivessel column is operated as a closed system without product withdrawal and the three components are accumulated in the vessels during one closed operation. The closed mode (total reflux) o...

Acetic acid is the most widely used aliphatic carbonic acid used as a reaction partner during the manufacture of acetic acid esters, or employed as a solvent in the production of cellulose acetate. Although acetic acid and water do not form any azeotrope, use of simple distillation to separate these two components is still not practical due to its high energy consumption rate. In this work, som...

Knowledge distillation is a potential solution for model compression. The idea is to make a small student network imitate the target of a large teacher network, then the student network can be competitive to the teacher one. Most previous studies focus on model distillation in the classification task, where they propose different architects and initializations for the student network. However, ...

This paper presents a modern modeling approach for reactive distillation processes with potential phase splitting. It is based on a classical model (pseudo-homogeneous) in connection with a robust and reliable phase splitting algorithm (through homotopy-continuation method), performed at each simulation step. Model validation stage and a simple case-study (by applying the new approach to a reac...

This paper presents the participation of FEUP, from University of Porto, in the TREC 2008 Blog Track. FEUP participated in two tasks, the baseline adhoc retrieval task and the blog finding distillation task. Our approach was focused on the use of the temporal information available in the TREC Blog06 collection. For the baseline adhoc retrieval task a simple temporal sort was evaluated. In the b...

Shortcut Methods for Complex Distillation Columns: Part 1 -Minimum Reflux This two-part paper presents in detail the theory for calculating via shortcut methods the minimum reflux conditions and the number of stages and feed tray location for ordinary and thermally coupled columns. Nonadjacent key components are permitted. In this paper, part 1, the approximations made to estimate minimum reflu...

Multicomponent-distillation calculation methods are classified as rating or design methods. A few rating methods are widely used but none of the design methods has found general acceptance. Recently, a few design methods have been proposed using the stage-tostage calculations and starting from one of the ends of the column, but they require tedious calculations. We present here a simple design ...

Rose water is one of the most important products obtained from Rosa genus (Rosaceae). Although Iran is one of the main producers of rose water, limited research has been done on it. A simple distillation and a Clevenger-type apparatus were used to obtain rose water and rose oil. All the volatile concentrates were investigated for their chemical composition by gas chromatography (GC) and gas chr...