Accelerating the development of near zero-emission coal-fueled power generation has been proposed in the U.S. as one means of closing the gap between the need to utilize fossil-fuels while simultaneously reducing emissions.1 The technology integrates coal gasification, which can produce a relatively high-purity CO2 stream, with geologic sequestration2, i.e. injecting the captured CO2 stream into a target geologic formation at depths typically >1000 m where pressure and temperature are above the critical point for CO2. Without question, CO2 capture remains the most expensive component of an overall capture, transport, and sequestration system. Commercial carbon dioxide capture systems are available on a scale of a few hundred tons of CO2 captured per day. However, the capture of CO2 from large, industrial power or synfuel plants will require capture systems that are an order-of-magnitude larger (~1 million to 3 million tons per year) and an order-of-magnitude cheaper (i.e., reducing the cost from ~$50/ton to $5/ton of captured CO2). Hence, there is growing interest in alternative materials and processes for CO2 capture. Several alternative concepts for CO2 capture have been proposed, including chemisorption on oxide surfaces, physical adsorption on porous silicates, activated carbons, and zeolites. metal organic frameworks3 and non-porous organic crystals are receiving increasing attention because of recent discoveries regarding their gas absorption properties.4 In this paper, we discuss the remarkable CO2 absorption properties of a new solvent-free porous organic solid, p-tert-butylcalix[4]dihydroquionone, 1
Revised: July 18, 2007 |
Published: July 3, 2007
Citation
Thallapally P.K., B.P. McGrail, J.L. Atwood, C. Gaeta, and P. Neri. 2007.Carbon Dioxide Capture in a Self-Assembled Organic Nanochannels.Chemistry of Materials 19, no. 14:3355-3357.PNNL-SA-53978.doi:10.1021/cm0709121