Chromium-based MIL-101 metal organic framework as a fully regenerable D4 adsorbent for biogas purification. (August 2019)

• Record Type: Journal Article
• Authors: Gargiulo, Nicola; Peluso, Antonio; Aprea, Paolo; Marino, Ottavio; Cioffi, Raffaele; Jannelli, Elio; Cimino, Stefano; Lisi, Luciana; Caputo, Domenico
• Is Part Of: Renewable energy. Volume 138(2019)
• Page Start: 230
• Page End: 235
• Publication Date: 2019-08
• Subjects: Metal organic framework -- Siloxane -- Adsorption -- Biogas cleanup -- Fuel cells; Renewable energy sources -- Periodicals; Power resources -- Periodicals; Énergies renouvelables -- Périodiques; Ressources énergétiques -- Périodiques; 333.794
• DOI: 10.1016/j.renene.2019.01.096
• Languages: English
• ISSNs: 0960-1481

Abstract

Abstract: In this work, the chromium-based MIL-101 metal organic framework has been synthesized and investigated as a fully regenerable, high capacity sorbent for siloxanes, which are common contaminants in raw biogas from anaerobic digestion. Adsorption isotherms of D4, the most common siloxane in waste treatment plants, have been collected at different temperatures and modelled by means of the Langmuir theoretical isotherm. The selected metal organic framework shows a remarkable affinity for siloxane adsorption and an outstanding saturation capacity weakly dependent on temperature. Moreover, repeated adsorption isotherms, collected after a reactivation treatment of the same adsorbent sample, clearly indicate full regeneration capabilities. Considering that chromium-based MIL-101 is also a noticeable H2 S adsorbent, the results reported in this work pave the way to its potential application for the simultaneous removal of the two main poisoning compounds contained in biogas. Highlights: MIL-101 metal organic framework (MOF) was synthesized as a D4 siloxane adsorbent. D4 siloxane adsorption was studied by collecting adsorption equilibrium isotherms. MIL-101 MOF showed unprecedented regenerability after D4 adsorption. MIL-101 MOF is already acknowledged as a noticeable H2 S adsorbent. Effective removal of both siloxanes and H2 S from biogas can be likely achieved.