Synthesis Gas Purification

Abstract : Fischer-Tropsch (FT) based B-XTL processes are attractive alternatives for future energy production. These processes aim at converting lignocellulosic biomass possibly in co-processing with petcoke, coal, or vacuum residues into synthetic biofuels. A gasification step converts the feed into a synthesis gas (CO and H2 mixture) , which undergoes the Fischer-Tropsch reaction after H2/CO ratio adjustment and CO2 removal. However synthesis gas also contains various impurities that must be removed in order to prevent Fischer-Tropsch catalyst poisoning. Due to the large feedstocks variety that can be processed, significant variations of the composition of the synthesis gas are expected. Especially, this affects the nature of the impurities that are present (element, speciation), as well as their relative contents. Moreover, due to high FT catalyst sensitivity, severe syngas specifications regarding its purity are required. For these reasons, synthesis gas purification constitutes a major challenge for the development of B-XTL processes. In this article, we focus on these major hurdles that have to be overcome. The different kinds of syngas impurities are presented. The influence of the nature of feedstocks, gasification technology and operating conditions on the type and content of impurities is discussed. Highlight is given on the fate of sulfur compounds, nitrogen compounds, halides, transition and heavy metals. Main synthesis gas purification technologies (based on adsorption, absorption, catalytic reactions, etc.) are finally described, as well as the related challenges.
Document type :
Journal articles
Liste complète des métadonnées

https://hal-ifp.archives-ouvertes.fr/hal-01936192
Contributor : Edp Sciences <>
Submitted on : Tuesday, November 27, 2018 - 12:02:19 PM
Last modification on : Thursday, February 7, 2019 - 4:29:42 PM
Document(s) archivé(s) le : Thursday, February 28, 2019 - 2:10:28 PM

File

ogst120260.pdf
Publication funded by an institution

Identifiers

Collections

IFP | CEA | OGST

Citation

D. Chiche, C. Diverchy, A.-C. Lucquin, F. Porcheron, F. Defoort. Synthesis Gas Purification. Oil & Gas Science and Technology - Revue d'IFP Energies nouvelles, Institut Français du Pétrole, 2013, 68 (4), pp.707-723. ⟨10.2516/ogst/2013175⟩. ⟨hal-01936192⟩

Share

Metrics

Record views

21

Files downloads

588