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Comment Separation Processes

Metal-organic-framework adsorbent promise to cut costs for capturing and storing flare gas

By Gerald Ondrey |

A process for the separation and recovery of stranded and associated natural gas is being developed by Framergy, Inc. (Wilmington, Del.; www.framergy.com), with support from the National Science Foundation’s Small Business Innovation Research (SBIR) Phase I program. The company is developing a re-usable, transport-ready container to store gas at low pressure with a low-cost metal-organic-framework (MOF) adsorbent. This will eliminate the need for expensive gas-capture, purification and multi-stage compression systems in conventional methods, and will utilize gas that is normally flared. Framergy’s unique MOF material is composed of high-valence transition metal ions (such as Al+3, Fe+3 and Cr+3), which provide chemical stability under flare-gas conditions, while delivering high working capacity when used under pressure-swing cyclic operation, explains Koray Ozdemir, vice president and senior engineer at Framergy. The MOFs are based on the so-called PCN-250 (porous coordinated network), which was invented by Hong-Cai Zhou, professor of chemistry at Texas A&M University (College Station, Tex.; www.tamu.edu). The company’s high-alkane adsorbed natural gas (trademarked, HAANG) technology further improves the MOFs’ working…
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