1,721,020 research outputs found
Optimal Distillation Sequence For The Separation of a N-Paraffin Mixture Under Industrial Constraints: a Case Study
No full textOptimal synthesis and design of extractive distillation systems for bioethanol separation: from simple to complex columns
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Solubilities of L-cystine, L-tyrosine, L-leucine, and Glycine in Aqueous Solutions at Various pHs and NaCl Concentrations
No full textEnergy saving in a crude distillation unit by a preflash implementation
No full textAfter the 70s energy crisis the revamping of plants designed before this date is very attractive for improving energy recovery and lowering operation costs. A typical case is the oil refinery plant where an intensive usage of energy takes place and is a promising case for the application of energy saving solutions. In this work we focused our attention to an industrial crude oil distillation unit, evaluating the possibility to modify the feed conditions by installing a preflash drum or a preflash plate column. Real data plant were collected to obtain a reliable simulation of the unit by means of the software package Aspen Plus 13.0. To characterize the crude oil fed the TBP curve was used. The results obtained were compared with the plant data in terms of flow rate and product quality utilizing the ASTM D-86 curves and a good agreement was obtained. According to the specialized literature the preflash drum/column was placed at the end of the pre-heat train, just before the column furnace. The furnace is the bottleneck of the plant and with both the preflash devices it is possible to lower its energy consumption. However the energy reduction is associated to the decrease of one kind of distillates (light or middle). The choice of the best preflash device was made according to the production asset of the plant. (C) 2008 Elsevier Ltd. All rights reserved
Partial feed and product withdrawal for the SMB separation of a glucose-fructose mixture
No full textRecovery of polyphenols from olive oil mill wastewaters by a chromatographic process: design and simulation
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Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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