This work has been financed by Research Projects of the Regional Government of Asturias (project reference GRUPIN-IDI/2018/000116) and the Spanish Ministry of Economy and Competitiveness (CTQ2017-89443-C3-2-R). Raquel Peláez acknowledges the Spanish Ministry of Economy and Competitiveness for the PhD grant that supports her research.
This work has been financed by Research Projects of the Regional Government of Asturias (project reference GRUPIN14-078) and the Spanish Ministry of Economy and Competitiveness (CTQ2014-52956-C3-1-R and CTQ2017-89443-C3-2-R). Raquel Peláez acknowledges the Spanish Ministry of Economy and Competitiveness for the PhD Grant that supports her research (FPI Program).
This work has been financed by Research Projects of the Regional Government of Asturias (project reference GRUPIN14-078), Spanish Ministry of Economy and Competitiveness (CTQ2014-52956-C3-1-R) and by Blue Plasma Power (FUO-EM-222-14) company
Unconventional methane resources are usually diluted in air, which prevents their use as feedstock in chemical or thermal processes. Some of them (e.g. coal mine ventilation air or diluted landfill biogas) are emitted directly to the atmosphere without harnessing, increasing the contribution of methane to global warming. Gas permeation membranes offer an alternative for the concentration of these methane resources, increasing considerably their harnessing possibilities. Microporous materials, such as carbon molecular sieve, zeolite or metal organic frameworks, have emerged as alternative to polymeric materials for the preparation of these membranes. The present work is based on simulations of the separation of methane and nitrogen mixtures, using SAPO-34 and carbon molecular sieve membranes. Mass transfer has been modelled in two scales: the membrane material (modelled using the Maxwell-Stefan multicomponent surface diffusion model) and the membrane module (based on the plug flow model). A sensitivity analysis of the influence of the main operating variables on the membrane performance has revealed that the most important ones are transmembrane pressure difference, methane feed concentration and membrane loading. It has been found that SAPO-34 membranes are more suited to concentrate methane in lean mixtures, while the carbon membrane perform better with rich mixtures. The membrane process has been scaled-up for a feed gas flow rate of 1000 m3 /h n.t.p. with target methane recovery of 70% for two cases: lean (1%) and rich (50%) methane feed mixtures. ; This work has been financed by the Research Fund for Coal and Steel of the European Union (contract RFCS2016/754077-METHENERGYþ).
This work was supported by the Research Fund for Coal and Steel of the European Union (contract UE-10-RFCR-CT-2010-00004). N. Canto, A. González and E. Ongallo (HUNOSA-Spain) areacknowledged for providing us information about emission patternsin the coal shafts of the company
This work has been financed by Research Projects of the Regional Government of Asturias (project reference GRUPIN14-078) and the Spanish Ministry of Economy and Competitiveness (CTQ2014-52956- C3-1-R). The authors acknowledge Chempack and BASF companies for supplying the METS-1 and γ‑Al2O3 catalysts respectively. Raquel Peláez acknowledges the Spanish Ministry of Economy and Competitiveness for the PhD Grant that supports her research. Ewan Bryce acknowledges the financial support of the Erasmus Program (University of OviedoStrathclyde University, Glasgow).
This work has been financed by the Spanish Ministry of Economy and Competitiveness (CTQ2014-52956-C3-1-R) and by the Government of the Principality of Asturias (contract FC-15-GRUPIN14-078). Raquel Peldez acknowledges the Spanish Ministry of Economy and Competitiveness for the PhD grant that supports her research.
This work was financed by the Spanish Council of Environment (ref. 165/PC08/1-13.1). Emilio Muñoz thanks the Government of the Principality of Asturias for a PhD fellowship (Severo Ochoa Program). Catalyst samples were a generous gift from ARGILLON.
This work was supported by the Research Fund for Coal and Steel of the European Union (contract UE-10-RFCR-CT-2010-00004). The author Claire R. Thomson acknowledges the financial support of the Erasmus Program (University of Oviedo-Strathclyde University, Glasgow)
The authors would like to acknowledge the financial support provided by both Asturian Government (project GRUPIN14-078) and Spanish Ministry of Economy and Competitiveness (project CTQ2013-44447-R).
