Lecture

Batch to Continuous: Process Intensification and Green Chemistry

Graph Chat

Chat with Graph Search

Ask any question about EPFL courses, lectures, exercises, research, news, etc. or try the example questions below.

DISCLAIMER: The Graph Chatbot is not programmed to provide explicit or categorical answers to your questions. Rather, it transforms your questions into API requests that are distributed across the various IT services officially administered by EPFL. Its purpose is solely to collect and recommend relevant references to content that you can explore to help you answer your questions.

In course

ChE-408: Process intensification and green chemistry

The first part of the course (~20%) is devoted to green chemistry and life cycle assessment. The remainder focuses on process intensification (fundamentals, detailed description of a few selected technologies, with a special focus on microreactors). Exa ...

Description

This lecture discusses the transition from batch to continuous processing in chemical engineering, focusing on the advantages and limitations of both reactor types, high pressure processing, criteria for implementing continuous processing, and examples of pressure-enhanced reactions. It covers the potential benefits of continuous reactors, such as increased mixing intensity, homogeneous mixing, reduced holdup, and enhanced heat and mass transfer. The use of supercritical fluids as solvents is explored, highlighting their properties, advantages, and operational regions. The lecture also delves into the effects of high pressure conditions on volume, viscosity, and dielectric constant, as well as the criteria for choosing industrializable technologies and the advantages of continuous processing over batch processing.

This video is available exclusively on Mediaspace for a restricted audience. Please log in to MediaSpace to access it if you have the necessary permissions.

Watch on Mediaspace

Instructor

Harvey Randall

Official source

Related concepts (32)

Heat transfer

Heat transfer is a discipline of thermal engineering that concerns the generation, use, conversion, and exchange of thermal energy (heat) between physical systems. Heat transfer is classified into various mechanisms, such as thermal conduction, thermal convection, thermal radiation, and transfer of energy by phase changes. Engineers also consider the transfer of mass of differing chemical species (mass transfer in the form of advection), either cold or hot, to achieve heat transfer.

Nuclear reactor

A nuclear reactor is a device used to initiate and control a fission nuclear chain reaction or nuclear fusion reactions. Nuclear reactors are used at nuclear power plants for electricity generation and in nuclear marine propulsion. Heat from nuclear fission is passed to a working fluid (water or gas), which in turn runs through steam turbines. These either drive a ship's propellers or turn electrical generators' shafts. Nuclear generated steam in principle can be used for industrial process heat or for district heating.

Breeder reactor

A breeder reactor is a nuclear reactor that generates more fissile material than it consumes. These reactors can be fuelled with more commonly available isotopes of uranium and thorium, such as uranium-238 or thorium-232, as opposed to the rare uranium-235 which is used in conventional reactors. These materials are called fertile materials since they can be bred into fuel by these breeder reactors. Breeder reactors achieve this because their neutron economy is high enough to create more fissile fuel than they use.

Convection (heat transfer)

Convection (or convective heat transfer) is the transfer of heat from one place to another due to the movement of fluid. Although often discussed as a distinct method of heat transfer, convective heat transfer involves the combined processes of conduction (heat diffusion) and advection (heat transfer by bulk fluid flow). Convection is usually the dominant form of heat transfer in liquids and gases. Note that this definition of convection is only applicable in Heat transfer and thermodynamic contexts.

Light-water reactor

The light-water reactor (LWR) is a type of thermal-neutron reactor that uses normal water, as opposed to heavy water, as both its coolant and neutron moderator; furthermore a solid form of fissile elements is used as fuel. Thermal-neutron reactors are the most common type of nuclear reactor, and light-water reactors are the most common type of thermal-neutron reactor. There are three varieties of light-water reactors: the pressurized water reactor (PWR), the boiling water reactor (BWR), and (most designs of) the supercritical water reactor (SCWR).

Related lectures (64)

Chemical reaction engineering: reactor design

Explores the Chemical Reaction Engineering algorithm applied to isothermal reactor design, with examples on SO2 oxidation and N2O4 decomposition.

Chemical Reaction Engineering: Reactor Design

Explores chemical kinetics, reactor design, and critical thinking in chemical reaction engineering.

Chemical Reaction Engineering

Covers the analytical derivation of various design models and reactor sizing.

Chemical Reaction Engineering: Algorithm and Stoichiometry

Explores the Chemical Reaction Engineering algorithm in batch reactors and CSTRs, focusing on stoichiometry and rate laws.

Chemical Reaction Engineering: Conversion and Reactor Sizing