نتایج جستجو برای: extractive distillation

تعداد نتایج: 11222  

2017
Ramesh Nallapati Feifei Zhai Bowen Zhou

We present SummaRuNNer, a Recurrent Neural Network (RNN) based sequence model for extractive summarization of documents and show that it achieves performance better than or comparable to state-of-the-art. Our model has the additional advantage of being very interpretable, since it allows visualization of its predictions broken up by abstract features such as information content, salience and no...

Journal: :Digital chemical engineering 2022

This study reexamined the possibility of improving separation binary azeotropic mixture containing tetrahydrofuran (THF) and ethanol from previous work ( J Chem Technol Biotechnol 2015; 90: 1463–1472) that rely on extractive distillation (ED) using ethylene glycol (EG) as solvent. Here, dimethyl sulfoxide (DMSO) is proposed an alternative solvent for ED, its feasibility preliminary screened com...

2004
Karl Gerd H. Vollbrecht Frank Verstraete

We construct new entanglement distillation protocols by interpolating between the recurrence and hashing protocols. This leads to asymptotic two-way distillation protocols, resulting in an improvement of the distillation rate for all mixed Bell diagonal entangled states, even for the ones with very high fidelity. We also present a method how entanglement-assisted distillation protocols can be c...

2013
AASTHA GUPTA ASHA RANI VIJANDER SINGH

Distillation is an essential separation process in the chemical and petrochemical industry. The distillation process is a highly nonlinear, complex, interactive and non -stationary, therefore its control is difficult. In the present work an adaptive neuro-fuzzy controller is designed to control a binary distillation process. A conventional PID controller is also designed for comparison purpose....

2006
Juan Gabriel Segovia-Hernández Salvador Hernández Arturo Jiménez

Distillation is a widely used separation method in the process industries and it is the largest energy consumer among individual process units. Improvement of energy efficiency in distillation systems is still an active research field. Among the issues concerned with the improvement of energy efficiency of distillation systems, the optimal design and synthesis A SHORT Note ABOUT ENERGY-EFFICIEN...

2006
Santanu Bandyopadhyay

Invariant rectifying and stripping (IRS) curves are used for thermodynamic analysis of a distillation column. Thermal integration of a distillation column with the background process through side exchangers (side reboilers/condensers) is important for energy-efficient design of a distillation column. Thermal integration of a distillation column through side exchangers also improves the exergeti...

Journal: :journal of medicinal plants and by-products 0

medicinal plante borazambol with the scientific name of perovskia abrotanoides karel. belongs to the family lamiaceae. it is growing wild in the margin of mountainous roads of arid and cold climate of north iran. it is for a long time that indigenous people by different methods in traditional medicine use its products in preventing and curing diseases. in this research, essential oils of perovs...

2005
Jignesh Gangadwala Achim Kienle Utz-Uwe Haus Dennis Michaels Robert Weismantel

This paper is concerned with the computer-aided optimal design of reaction-distillation processes. The production of solvent 2,3-dimethylbutene-1 by isomerization of 2,3dimethylbutene-2 is considered as an innovative benchmark problem. Possible process candidates are a reactive distillation column, a reactor coupled to a nonreactive distillation column or a reactive reboiler with a nonreactive ...

2005
S. Hernández J. G. Segovia-Hernández J. Carlos Cárdenas V. Rico-Ramírez

This paper presents the retrofit of five conventional distillation trains for the separation of quaternary mixtures of hydrocarbons for feed compositions with high or low content of intermediate components. The retrofit implies the incorporation of liquid or vapour recycle streams among the conventional distillation columns. Each recycle stream removes one condenser or one reboiler. The introdu...

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