Multi-criteria analysis for selecting the optimum blend in the co-gasification process. (4th October 2020)

• Record Type: Journal Article
• Authors: Puig-Gamero, M.; Sanchez-Silva, L.; Dorado, F.; Sánchez, P.
• Is Part Of: Computers & chemical engineering. Volume 141(2020)
• Publication Date: 2020-10-04
• Subjects: Co-gasification -- Multi-criteria analysis -- H2/CO -- Price -- CO2 burden -- Reactivity; Chemical engineering -- Data processing -- Periodicals; 660.0285
• DOI: 10.1016/j.compchemeng.2020.106983
• Languages: English
• ISSNs: 0098-1354

Abstract

Highlights: AHP was used to obtain the best blend in the co-gasification of biomasses and petcoke. The criteria selected were H2 /CO ratio, reactivity, CO2 burden and feedstock price. Fifteen blends were proposed as alternatives. 28 scenarios were considered to evaluate all possible interactions between criteria. The blends with high olive pomace content were the most promising in gasification. Abstract: Co-gasification is an efficient process for obtaining valuable by-products from blending different raw materials. However, selecting the optimum blend is complicated to establish as it depends on the criterion selected. In this study, the Analytical Hierarchy Process was used for obtaining the optimum blend in the co-gasification of olive pomace, almond shells and petcoke. Thus, four criteria (H2 /CO ratio, gasification reactivity, CO2 burden and raw material price) and fifteen alternatives were proposed. Moreover, a sensitivity analysis was made to determine potential changes in the alternatives ranking. At this point, 29 scenarios were considered for evaluating all possible interactions between the criteria. The optimal sample depended on the scenario studied, which meant criteria weightages were significant. Moreover, a normalized priority ranking was calculated by taking all scenarios into consideration. Finally, the olive pomace and the blend of 75wt. % of olive pomace and 25wt. % of petcoke presented the best results.