Performance of simulated flexible integrated gasification polygeneration facilities. Part A: A technical-energetic assessment
This article investigates technical possibilities and performances of flexible integrated gasification polygeneration (IG-PG) facilities equipped with CO2 capture for the near future. These facilities can produce electricity during peak hours, while switching to the production of chemicals during off-peak hours. Several simulations were performed to investigate the influence of substituting feedstock and production on IG-PG facility output, load and efficiency. These simulations were done using a detailed AspenPlus simulation model of a Shell entrained flow gasifier combined with conversion facilities. In this model carbon-rich feedstocks (oil residues, coal and biomass) were converted to a variety of products (H2, electricity, FT-liquids, methanol and urea) using state-of-the-art technology. The size of the gasifier was limited to the equivalent of 2000Â MWth Il #6 coal input. Overall efficiency of the simulated non-flexible configurations to convert pure coal or pure wood pellets to electricity (40%HHV vs 38%HHV), FT-liquids (60%HHV vs 55%HHV), methanol (53%HHV vs 49%HHV) or urea (51%HHV vs 47%HHV) are in good agreement with the literature. Using torrefied wood pellets instead of pure wood pellets reduces the penalty drop in efficiency compared to coal. Moreover, torrefied wood pellets have superior energetic density, handling and feeding compared to wood pellets. In this analysis, the H2:CO ratio of the sweet syngas was fixed to match FT-liquids criterion. As a result, overall CO2 capture rates are low, around 56-65%, depending on the feedstock used. Still, especially with FT-liquids and methanol production, CO2 emissions at the facility are significantly reduced; less than 20% of the carbon feedstock entering the facility is emitted with the flue gas. Applying biomass and CO2 capture shows great opportunities to produce CO2-neutral electricity or chemicals. When the biomass fraction exceeds 40% on an energy basis, production is CO2-neutral, independent of what is produced. Biomass can be co-fed up till 50% on an energy basis. Higher fractions cause significant fouling on cooling equipment. A small part-load penalty is observed during the substitution of coal by biomass. When changing from pure coal to pure wood pellets, the power case suffers a 2.5% efficiency drop, while all three chemical cases have an efficiency drop of less than 1%. At the same time total output is reduced to 67-69%, mainly because of the lower energy density of biomass. By over-dimensioning the gasifier and gas cleanup and optimisation section this drop can be eliminated. The syngas can be tailored to the desired composition regardless of the used feedstock. Therefore, the chemical conversion sections only have to cope with a reduction in syngas flow and not with a change in syngas composition. Altering production between chemicals and electricity is possible, although the load of the conversion sections should remain between 40% and 100% to prevent operational problems. This gives a high degree of flexibility. Complete substitution between chemical and power production while using the same feedstock is possible for the methanol and urea cases. The FT-liquids case is restricted to 60-100% load of the chemical conversion section to prevent that the gas turbine load is reduced below 40%. The economic aspects of flexible IG-PG facilities are addressed in part B.
If you experience problems downloading a file, check if you have the proper application to view it first. In case of further problems read the IDEAS help page. Note that these files are not on the IDEAS site. Please be patient as the files may be large.
As the access to this document is restricted, you may want to look for a different version under "Related research" (further below) or search for a different version of it.
Volume (Year): 15 (2011)
Issue (Month): 6 (August)
|Contact details of provider:|| Web page: http://www.elsevier.com/wps/find/journaldescription.cws_home/600126/description#description|
|Order Information:|| Postal: http://www.elsevier.com/wps/find/journaldescription.cws_home/600126/bibliographic|
References listed on IDEAS
Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
- AfDB AfDB, . "African Development Report 2006," African Development Report, African Development Bank, number 23 edited by Adeleke Oluwole Salami, 8.
- AfDB AfDB, . "AfDB Group Annual Report 2006," Annual Report, African Development Bank, number 62 edited by Koua Louis Kouakou, 8.
- Ronald W. Breault, 2010. "Gasification Processes Old and New: A Basic Review of the Major Technologies," Energies, MDPI, Open Access Journal, vol. 3(2), pages 216, February.
- Wipo, 2007. "WIPO PATENT REPORT, 2007 edition," WIPO Economics & Statistics Series, World Intellectual Property Organization - Economics and Statistics Division, number 2007:931.
- AfDB AfDB, . "African Development Report 2007," African Development Report, African Development Bank, number 24 edited by Adeleke Oluwole Salami, 8.
- Wipo, 2007. "WIPO PATENT REPORT, 2008 edition," WIPO Economics & Statistics Series, World Intellectual Property Organization - Economics and Statistics Division, number 2008:931.
- Graham, John R. & Li, Si & Qiu, Jiaping, 2008.
"Corporate misreporting and bank loan contracting,"
Journal of Financial Economics,
Elsevier, vol. 89(1), pages 44-61, July.
- Neelis, Maarten & Patel, Martin & Blok, Kornelis & Haije, Wim & Bach, Pieter, 2007. "Approximation of theoretical energy-saving potentials for the petrochemical industry using energy balances for 68 key processes," Energy, Elsevier, vol. 32(7), pages 1104-1123.
- Uslu, Ayla & Faaij, André P.C. & Bergman, P.C.A., 2008. "Pre-treatment technologies, and their effect on international bioenergy supply chain logistics. Techno-economic evaluation of torrefaction, fast pyrolysis and pelletisation," Energy, Elsevier, vol. 33(8), pages 1206-1223.
- Hamelinck, Carlo N. & Faaij, André P.C. & den Uil, Herman & Boerrigter, Harold, 2004. "Production of FT transportation fuels from biomass; technical options, process analysis and optimisation, and development potential," Energy, Elsevier, vol. 29(11), pages 1743-1771.
- -, 2007. "Caribbean development report Volume I," Sede Subregional de la CEPAL para el Caribe (Estudios e Investigaciones) 38725, Naciones Unidas Comisión Económica para América Latina y el Caribe (CEPAL).
- ,, 2007. "African Development Report 2007," OUP Catalogue, Oxford University Press, number 9780199238866, June.
When requesting a correction, please mention this item's handle: RePEc:eee:rensus:v:15:y:2011:i:6:p:2563-2587. See general information about how to correct material in RePEc.
For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: (Zhang, Lei)
If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.
If references are entirely missing, you can add them using this form.
If the full references list an item that is present in RePEc, but the system did not link to it, you can help with this form.
If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your profile, as there may be some citations waiting for confirmation.
Please note that corrections may take a couple of weeks to filter through the various RePEc services.