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Green LPG

Hulteberg, Christian LU ; Brandin, Jan LU and Leveau, Andreas (2010) In Rapport SGC SGC-R-222-SE.
Abstract
The use of energy gases with renewable origins will become important with diminishing fossil resources. This as the infrastructure of the gaseous fuels is well built out and the distribution networks already exist. LPG is one of the most versatile fuels around, perfect for rural areas and in many other applications. The fossil origin of the fuel will, in today’s climate and environmental debate, however position it as a thing of the past and not part of the future energy supply. The technology and development performed under this and previous programs with the Swedish Gas Centre will however suggest a way to bridge this conception and make LPG a part of the future energy mix.



A good starting point for two and three... (More)
The use of energy gases with renewable origins will become important with diminishing fossil resources. This as the infrastructure of the gaseous fuels is well built out and the distribution networks already exist. LPG is one of the most versatile fuels around, perfect for rural areas and in many other applications. The fossil origin of the fuel will, in today’s climate and environmental debate, however position it as a thing of the past and not part of the future energy supply. The technology and development performed under this and previous programs with the Swedish Gas Centre will however suggest a way to bridge this conception and make LPG a part of the future energy mix.



A good starting point for two and three carbon energy gases is glycerine, with its three carbon backbone. The reason for focusing on glycerine is its benign chemical nature, it is:



• Harmless from a toxic standpoint

• Chemically inert

• Non-corrosive

• Relatively high energy density

• Zero carbon dioxide emissions



It is also readily available as the production of biofuels (from which glycerine is a sideproduct) in the world has increased markedly over the last 10 year period. This glut in the glycerol production has also lowered worldwide prices of glycerine.



Since the key step in producing energy gases from glycerol is the dehydration of glycerol to acrolein, this step has attracted much attention during the development work. The step has been improved during the performed work and the need for any regeneration of the catalyst has been significantly reduced, if not omitted completely. This improvement allows for a simple fixed bed reactor design and will save cost in reactor construction as well as in operating costs of the plant. The same conclusion can be drawn from the combination of the two functionalities (dehydration and hydrogenation) in designing a catalyst that promote the direct reaction of 1-propanol to propane in one step instead of two.



The experiments with the decarbonylation of acrolein to form ethane show that the catalyst deactivation rates are quite rapid. The addition of noble metal to the catalyst seems to improve the longevity of the catalyst, but the coking is still too severe to provide for a commercially viable process. It is believed that there is a possible way forward for the decarbonylation of acrolein to ethane; it will however require additional time and resources spent in this area.



In this work it has been shown that all of the catalytic steps involved in the production of propane from glycerol have sufficient longterm stability and endurance and it is motivated to recommend that the project continues to pilot plant testing stage. (Less)
Please use this url to cite or link to this publication:
author
publishing date
type
Book/Report
publication status
published
subject
keywords
Chemical Engineering, LPG, Renewable, Green
in
Rapport SGC
volume
SGC-R-222-SE
pages
38 pages
publisher
Swedish Gas Centre
ISSN
1102-7371
language
English
LU publication?
no
id
6be27548-8268-4c8a-a569-724fef8553b0 (old id 2026047)
alternative location
http://www.sgc.se/dokument/SGC222.pdf
date added to LUP
2011-07-20 12:27:20
date last changed
2018-05-29 11:41:40
@techreport{6be27548-8268-4c8a-a569-724fef8553b0,
  abstract     = {The use of energy gases with renewable origins will become important with diminishing fossil resources. This as the infrastructure of the gaseous fuels is well built out and the distribution networks already exist. LPG is one of the most versatile fuels around, perfect for rural areas and in many other applications. The fossil origin of the fuel will, in today’s climate and environmental debate, however position it as a thing of the past and not part of the future energy supply. The technology and development performed under this and previous programs with the Swedish Gas Centre will however suggest a way to bridge this conception and make LPG a part of the future energy mix. <br/><br>
<br/><br>
A good starting point for two and three carbon energy gases is glycerine, with its three carbon backbone. The reason for focusing on glycerine is its benign chemical nature, it is:<br/><br>
<br/><br>
• Harmless from a toxic standpoint<br/><br>
• Chemically inert<br/><br>
• Non-corrosive<br/><br>
• Relatively high energy density<br/><br>
• Zero carbon dioxide emissions <br/><br>
<br/><br>
It is also readily available as the production of biofuels (from which glycerine is a sideproduct) in the world has increased markedly over the last 10 year period. This glut in the glycerol production has also lowered worldwide prices of glycerine.<br/><br>
<br/><br>
Since the key step in producing energy gases from glycerol is the dehydration of glycerol to acrolein, this step has attracted much attention during the development work. The step has been improved during the performed work and the need for any regeneration of the catalyst has been significantly reduced, if not omitted completely. This improvement allows for a simple fixed bed reactor design and will save cost in reactor construction as well as in operating costs of the plant. The same conclusion can be drawn from the combination of the two functionalities (dehydration and hydrogenation) in designing a catalyst that promote the direct reaction of 1-propanol to propane in one step instead of two. <br/><br>
<br/><br>
The experiments with the decarbonylation of acrolein to form ethane show that the catalyst deactivation rates are quite rapid. The addition of noble metal to the catalyst seems to improve the longevity of the catalyst, but the coking is still too severe to provide for a commercially viable process. It is believed that there is a possible way forward for the decarbonylation of acrolein to ethane; it will however require additional time and resources spent in this area. <br/><br>
<br/><br>
In this work it has been shown that all of the catalytic steps involved in the production of propane from glycerol have sufficient longterm stability and endurance and it is motivated to recommend that the project continues to pilot plant testing stage.},
  author       = {Hulteberg, Christian and Brandin, Jan and Leveau, Andreas},
  institution  = {Swedish Gas Centre},
  issn         = {1102-7371},
  keyword      = {Chemical Engineering,LPG,Renewable,Green},
  language     = {eng},
  pages        = {38},
  series       = {Rapport SGC},
  title        = {Green LPG},
  volume       = {SGC-R-222-SE},
  year         = {2010},
}