Serveur d'exploration sur le LRGP

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A Review of Short Residence Time Cracking Processes

Identifieur interne : 000B76 ( Main/Exploration ); précédent : 000B75; suivant : 000B77

A Review of Short Residence Time Cracking Processes

Auteurs : Craig Hulet ; Cedric Briens [Canada] ; Franco Berruti [Canada] ; Edward W. Chan

Source :

RBID : ISTEX:BDCD9E48F6F9941F100717A3FB39F214C9A5EBC4

Descripteurs français

English descriptors

Abstract

This review examines the key features and configurations of short residence time cracking processes from a diverse range of industries that have been developed over the past 25 years. These industries include: bitumen or heavy oil upgrading, biomass pyrolysis, olefin production, catalytic cracking, and coal gasification. Characterization of the gas, liquid, and solid products and feedstock is provided wherever possible. In addition, a description of the source and mechanism of heat transfer, and how the feedstock is brought into contact with and separated from – this source is also given.There is a strong economic incentive for considering short residence time cracking processes. Not only do such processes increase the yields of the more valuable liquid and gaseous products, but more compact designs would also decrease capital costs. Careful control of the vapour residence times appears to be crucial in order to prevent secondary cracking and yet allow for maximum cracking of the feedstock. Rapid and thorough mixing of the feedstock with the heat source, not just creating a uniform dispersion, is also a key design aspect to consider. Finally, rapid and complete separation must also be carefully considered; again, to help control product residence time and avoid secondary cracking but also from a heat balance point of view.

Url:
DOI: 10.2202/1542-6580.1139


Affiliations:


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Le document en format XML

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<term>Ethane</term>
<term>Ethylene</term>
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<term>Exxon</term>
<term>Feed rate</term>
<term>Feeder</term>
<term>Feedstock</term>
<term>Fersing</term>
<term>Flow plan</term>
<term>Flow rate</term>
<term>Flue</term>
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<term>Gaseous</term>
<term>Gaseous products</term>
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<term>Heat carrier particles</term>
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<term>Hydrocarbon feed</term>
<term>Hydrocarbon feedstock</term>
<term>Hydrocarbon processing</term>
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<term>Light olefins</term>
<term>Liquid feed</term>
<term>Liquid product</term>
<term>Liquid products</term>
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<term>Olefin</term>
<term>Olids</term>
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<term>Paccal process</term>
<term>Particulate solids</term>
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<term>Petroleum</term>
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<term>Process flow plan</term>
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<term>Product gases</term>
<term>Product vapour</term>
<term>Product vapours</term>
<term>Product yields</term>
<term>Production capacity</term>
<term>Propylene</term>
<term>Psia</term>
<term>Pyrolysis</term>
<term>Pyrolysis gasoline</term>
<term>Pyrolysis process</term>
<term>Pyrolysis system</term>
<term>Quenched</term>
<term>Quenching</term>
<term>Reaction chamber</term>
<term>Reaction temperature</term>
<term>Reaction zone</term>
<term>Reactor</term>
<term>Reactor configuration</term>
<term>Reactor pressure</term>
<term>Reactor residence time</term>
<term>Reactor residence times</term>
<term>Reactor system</term>
<term>Reactor temperature</term>
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<term>Reactor wall</term>
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<term>Residence time</term>
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<term>Riser reactor</term>
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<term>Schoenmakers</term>
<term>Screw feeder</term>
<term>Separator</term>
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<term>Shock wave</term>
<term>Short residence time</term>
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<term>Solid heat carrier</term>
<term>Solid particles</term>
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<term>Spray pattern</term>
<term>States patent</term>
<term>Stripper</term>
<term>Stripper vessel</term>
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<term>Superheated steam</term>
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<term>Typical feed</term>
<term>Typical results</term>
<term>Ultrapyrolysis</term>
<term>Upper portion</term>
<term>Vapors</term>
<term>Vapour</term>
<term>Vapours</term>
<term>Venturi</term>
<term>Vortex</term>
<term>Wagenaar</term>
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<front>
<div type="abstract" xml:lang="en">This review examines the key features and configurations of short residence time cracking processes from a diverse range of industries that have been developed over the past 25 years. These industries include: bitumen or heavy oil upgrading, biomass pyrolysis, olefin production, catalytic cracking, and coal gasification. Characterization of the gas, liquid, and solid products and feedstock is provided wherever possible. In addition, a description of the source and mechanism of heat transfer, and how the feedstock is brought into contact with and separated from – this source is also given.There is a strong economic incentive for considering short residence time cracking processes. Not only do such processes increase the yields of the more valuable liquid and gaseous products, but more compact designs would also decrease capital costs. Careful control of the vapour residence times appears to be crucial in order to prevent secondary cracking and yet allow for maximum cracking of the feedstock. Rapid and thorough mixing of the feedstock with the heat source, not just creating a uniform dispersion, is also a key design aspect to consider. Finally, rapid and complete separation must also be carefully considered; again, to help control product residence time and avoid secondary cracking but also from a heat balance point of view.</div>
</front>
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