scholarly journals Computation Transport Phenomena in Chemical Engineering. Combustion Characteristics of a Rotary Regenerative Combustion System(RRX).

1997 ◽  
Vol 23 (6) ◽  
pp. 914-919
Author(s):  
Yasuo Hirose ◽  
Hitoshi Kaji ◽  
Norio Arai
Keyword(s):  
Chemical Engineering ◽  
Transport Phenomena ◽  
Combustion Characteristics ◽  
Combustion System

Los paradigmas de la ingeniería química: las nuevas fronteras

2018 ◽  
Vol 28 (4) ◽  
Author(s):  
Reynerio Álvarez-Borroto ◽  
Ullrich Stahl ◽  
Elvia V. Cabrea-Maldonado ◽  
Marco V. Rosero-Espín
Keyword(s):  
Chemical Engineering ◽  
Transport Phenomena

<strong></strong>James Wei, profesor del «Department of Chemical Engineering-MIT» empleó el concepto de paradigma en 1988, introducido por T. Kuhn, para caracterizar las etapas evolutivas de la ingeniería química. Wei identificó 3 períodos: el preparadigmático, un primer paradigma que lo relaciona con la publicación del texto Principles of Chemical Engineering, y un segundo paradigma asociado al texto: Transport Phenomena, de Bird, Stewart and Lightfoot, en 1960. Los paradigmas de Wei son reduccionistas y limitados y deben ser ampliados y actualizados. En el presente trabajo se identifican 3 etapas: el preparadigmático, el paradigma de las operaciones unitarias, y el paradigma de la ciencia de la ingeniería química. Se hace referencia a las nuevas fronteras de la ingeniería química y a la necesidad de incluir nuevas disciplinas académicas y nuevas técnicas de enseñanza-aprendizaje.

Co-combustion Characteristics and Kinetics Behavior of Torrefied Sugarcane Bagasse and Lignite

2021 ◽  
Vol 10 (4) ◽  
pp. 737-746
Author(s):  
Ukrit Samaksaman ◽  
Kanit Manatura
Keyword(s):  
Thermogravimetric Analysis ◽  
Physicochemical Properties ◽  
Burning Rate ◽  
Sugarcane Bagasse ◽  
Combustion Characteristics ◽  
Firing Process ◽  
Combustion System ◽  
Heating Value ◽  
Kinetics Of ◽  
Derivative Thermogravimetry

The co-combustion characteristics and kinetics of torrefied sugarcane bagasse (TB), lignite (L), and their blended samples were experimentally investigated using thermogravimetric analysis (TGA) and derivative thermogravimetry (DTG)based on the Coats-Redfern method for kinetic estimation.Their physicochemical properties were also investigated.Raw bagasse was thermally treated in a laboratory-scale torrefactor at 275 °C with a torrefaction time of 60 min under an inert nitrogen environment.Then, the torrefied bagasse was blended with Thai lignite as a co-fuel at ratios of 50:50 (TB50L50), 70;30(TB70L30), and 90:10 (TB90L10), respectively. Torrefaction improved the fuel properties and heating value of the raw bagasse as well as reducing the O/C and H/C ratios.In addition, the blending of torrefied bagasse with lignite improved the combustion behavior.The TGA and DTG results indicated that the ignition and burnout temperatures stepped downwards with different increasing ratios of torrefied bagasse.The co-combustion behavior at the maximum burning rate showed that the burnout temperatures of TB50L50, TB70L30, and TB90L10 were 532, 529, and 528 °C, respectively, indicating a slight decrease with an increasing torrefied bagasse blending ratio.These results were sufficient to provide comprehensive guidelines in terms of the design and operation of the combustion system for adding torrefied bagasse into the co-firing process.

scholarly journals Improvements in Transport Phenomena Teaching

2018 ◽  
Author(s):  
Pierre Proulx ◽  
Francis B. Lavoie
Keyword(s):  
Physicochemical Properties ◽  
Flipped Classroom ◽  
Chemical Engineering ◽  
Transport Phenomena ◽  
Language Shift ◽  
Major Change ◽  
Mathematical Equation ◽  
Theoretical Understanding ◽  
Equation Solving ◽  
Web Platform

Over the last years, the Department of Chemical Engineering of the Université de Sherbrooke has made a major change: the Matlab teaching has been replaced by Python. This programming language shift allowed the access to multiple powerful tools which were not available before. The Transport Phenomena courses involve theoretical understanding, the use of multiple physicochemical properties as well as complex mathematical equation solving. Open-source Python packages were then substantially implemented in these courses and all exercises and examinations are now performed with computers. Moreover, the Transport Phenomena courses are now given in flipped classroom with the use of a novel web platform developed in our Department. This platform allows to execute Python codes directly on the website and allows to follow and to quantify the overall progress of the students in the course.

scholarly journals Effect of Spark Advance on a Gas Run Automotive Spark Ignition Engine

2010 ◽  
pp. 42-49 ◽  
Author(s):  
Md Ehsan
Keyword(s):  
Natural Gas ◽  
Flame Propagation ◽  
Chemical Engineering ◽  
Engine Performance ◽  
Spark Ignition ◽  
Constant Load ◽  
Combustion Characteristics ◽  
Spark Ignition Engine ◽  
Optimum Performance ◽  
Automotive Engine

Petrol engines can run on natural gas, with little modification. The combustion characteristics of naturalgas is different from that of petrol, which eventually affects the engine performance. The performance of atypical automotive engine was studied running on natural gas, firstly at a constant speed for various loadsand then at a constant load for a range of speeds and results were compared with performance using petrol.Variation of the spark advance, consisting of centrifugal and vacuum advance mechanisms, wasinvestigated. Results showed some reduction in power and slight fall of efficiency and higher exhausttemperature, for natural gas. The air-fuel ratio for optimum performance was higher for gas than for petrol.This variation in spark requirement is mainly due to the slower speed of flame propagation for natural gas.For both the cases, the best power spark advance for natural gas was found to have higher values thanpetrol. This issue needs to be addressed during retrofitting petrol engines for running on natural gas.Journal of Chemical Engineering Vol.ChE 24 2006 42-49

scholarly journals Computation Transport Phenomena in Chemical Engineering. Studies of Refining Crystallization on Octotiamine.

1997 ◽  
Vol 23 (6) ◽  
pp. 906-913
Author(s):  
Toshitaka Yoshino ◽  
Masashi Momonaga ◽  
Katsuhiko Shinozaki ◽  
Hisatoyo Yazawa
Keyword(s):  
Chemical Engineering ◽  
Transport Phenomena ◽  
Engineering Studies
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