PSA design for stoichiometric adjustment of bio-syngas for methanol production and co-capture of carbon dioxide

• Type: Article in International Scientific Journal
• Date: 2010

Authors

Ana M. Ribeiro (Author) FEUP; Santos, JC (Author) Other; Alírio Rodrigues (Author) FEUP

Journal

Title: Chemical Engineering Journal

Vol. 163 No. 3

Pages: 355-363

ISSN: 1385-8947

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 32 Citations

ISI Web of Science

Scopus - 43 Citations

Scientific classification

FOS: Engineering and technology > Chemical engineering

CORDIS: Technological sciences > Engineering > Chemical engineering

Other information

Authenticus ID: P-003-265

DOI: 10.1016/j.cej.2010.08.015

Abstract (EN): The use of synthesis gas obtained from biomass gasification as a feed stream to methanol production appears to be an environmental attractive alternative. However, the composition of the bio-syngas is deficient in hydrogen and therefore not suitable for direct methanol synthesis. A process to adjust the syngas composition to the required stoichiometric ratio (H-2-CO2)/(CO + CO2) of 2.1 is needed. In this study a pressure swing adsorption process used to adjust the stoichiometric ratio of a bio-syngas and co-capture carbon dioxide was designed. The results show that the separation and concentration of carbon dioxide to a stream ready for capture, purity above 95%, can be accomplished at high recovery of both products - 99.7% for CO2 and 99.5% for H-2, with a power consumption of 0.841 MW (1.83 kWh kmol(CO2)(-1)). An optimized operation of the process reduces the power consumption over 30% to 0.584 MW (1.27 kWh kmolCO(2)(-1)), but with a slight decrease in products recovery - 99.6% for CO2 and 98.6% for H-2.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 9