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Listar por autor "Molina, Alejandro"
Mostrando documentos 1-10 de 10
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A methodology for the measurement of carbon monoxide concentration during in-situ combustion with tunable diode laser
A TDL system is reported to monitor carbon monoxide (CO) concentration under conditions similar to those of laboratory-scale tests used to characterize the behaviour of a heavy crude oil during in situ combustion (ISC). ...Universidad Nacional de Colombia Sede Medellín Facultad de Minas Escuela de Procesos y Energía. -
Analysis of hydrodynamic forces on high-head slide gates using CFD
Coefficients that can be applied to current analytical expressions that predict the hydrodynamic forces and, particularly, the downpull phenomenon on an inverted 30° lip gate at a bottom outlet of a dam, were determined ...Universidad Nacional de Colombia Sede Medellín Facultad de Minas Escuela de Ingeniería Eléctrica y Mecánica. -
Caracterización de la combustión en un quemador de chamuscado de telas operando con varsol.
La industria textil emplea quemadores de chamuscado para disminuir la cantidad de filamentos rotos (pilling) en la superficie de las telas. Algunos de estos quemadores utilizan como combustible varsol el cual presenta alto ...Universidad Nacional de Colombia Revistas electrónicas UN Energética. -
Coke formation during thermal cracking of a heavy crude oil
A pseudo-mechanism for the production of coke during the thermal cracking of a Colombian heavy crude oil was proposed based on thermal cracking experiments carried out at TGA and at horizontal tube furnace at atmospheric ...Universidad Nacional de Colombia Sede Medellín Facultad de Minas Escuela de Química y Petróleos. -
Conceptual design of a palm oil hydrotreatment reactor for commercial diesel production
A reactor with an industrial production of renewable diesel via palm oil hydrotreatment was conceptually designed based on laboratory-scale continuous and semi-batch reactor experiments. The conversion of vegetable oil to ...Universidad Nacional de Colombia Sede Medellín Facultad de Minas Escuela de Química y Petróleos. -
Educational program for the prevention of fires and explosions through emerging technologies
Four real cases of fires and explosions in Colombia were used as the basis for an education program that aimed at training undergraduate and graduate engineering students in fire and explosion safety. A systematic review ... -
Improvement of the performance of a hydrocracking reactor using a computational fluid dynamics perspective
The distribution of the liquid phase at the top of the catalytic bed of a hydrocracking trickle bed reactor was obtained by CFD simulations and coupled to a 1-D hydrocracking reactor model, used to evaluate the performance ...Universidad Nacional de Colombia Sede Medellín Facultad de Minas Escuela de Química y Petróleos Ingeniería Química. -
Reaction pathways for in situ combustion
This study proposes reaction pathways to explain chemical routes that the fractions of a heavy crude oil follow during the thermal cracking and low temperature oxidation stages of in situ combustión (ISC). ISC is an enhanced ...Universidad Nacional de Colombia Sede Medellín Facultad de Minas Escuela de Química y Petróleos. -
Three-fiber optical probe for studying fluidized gas-solid beds in bubbling regime
This work shows the development of a three-optical fi ber probe to study the behavior of the bubble in bubbling fl uidized gas-solid beds. Its compact design allows minimizing disturbance to the fl ow fi eld, resulting in ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna. -
Three-fiber optical probe for studying fluidized gas-solid beds in bubbling regime.
This work shows the development of a three-optical fi ber probe to study the behavior of the bubble in bubbling fluidized gas-solid beds. Its compact design allows minimizing disturbance to the fl ow fi eld, resulting in ...Universidad Nacional de Colombia Sede Medellín Facultad de Minas Escuela de Procesos y Energía.
