中国P站

Abstract

The global organic biogas market was worth more than $19.5 billion (鈧�17.2bn) in 2015 and is forecast to exceed $32 billion by 2023, growing at more than 6% CAGR from 2016 to 2023. Biogas is primarily methane (CH4) and carbon dioxide (CO2). Separation of CO2 from CH4 is an importance step for biogas upgrading. Conventional approach uses pressure swing adsorption (PSA) to remove CO2 from biogas, which is energy intensive. Membrane separation is in general more energy efficient, but the low CO2 permeability of current CO2 membrane results in a consequence that the CO2 separation process typically requires compressing gas to a high pressure to achieve high separation flux, which also consumes a large amount of energy. Therefore a highly permeable and highly selective CO2 membrane is critical for cost-effective biogas purification. Reduced membrane thickness and precise pore size/chemistry control are the keys for achieving combined high flux and selectivity. Membranes in natural biological systems can be down to 4 nm in thickness and the pores are precisely constructed by molecular assembly, leading to unbeatable performance when compared to synthetic industrial membranes that are difficult to be fabricated with similar molecular level precision and are typically 100-1000 times thicker. ALD is a layer-bylayer deposition method that builds up a thin layer with atomic precision in structure and compositions. Here we introduce the membrane fabrication by the combination of molecule self- assembly and a 鈥減lasma-defined鈥� ALD process where the location of ALD modification is confined by plasma irradiation. Using this approach, hierarchically structured sub-20nm thick ultra-thin membranes with precisely defined pore size and pore surface chemistry have been successfully formed, leading to excellent CO2 permeability and selectivity. Recent Publications 1. Y. Fu, Y.鈥怋. Jiang, et al, and C. Brinker (2018), Bio鈥恑nspired ultrathin enzymatic nano鈥恠tablized liquid membrane for CO2 capture, Nature Communication (accepted, in press) 2. Fu, Y; Y.鈥怋. Jiang, et al and C. Brinker (2014), Atomic Layer Deposition of L鈥怉lanine Polypeptide. J. of Am. Chem. Soc., Vol 136 : p15821鈥�15824 3. Zhu, JL; et al, Jiang, YB et al, (2014), Porous Ice Phases with VI and Distorted VII Structures Constrained in Nanoporous Silica, Nano Letters, Vol 14, p6554鈥�6558 4. Liu, H. et al, Jiang Y.鈥怋. et al., Synthesis of core/shell structured Pd3Au@Pt/C with enhanced electrocatalytic activity by regioselective atomic layer deposition combined with a wet chemical method鈥� RSC ADVANCES Vol 6 (71) 66712鈥�66720 201 5. Moghaddam S, et al, Jiang YB et al (2010), An inorganic鈥恛rganic proton membrane for fuel cells with a controlled nanoscale pore structure鈥� Nature Nanotechnology, Vol. 5, 230鈥�236

Biography

Ying-Bing Jiang has his expertise in thin film materials and selectively permeable membranes. He developed the method of using plasma-defined atomic layer deposition (ALD) to make sub-10nm ultra-thin membranes. He is a research Professor at the University of New Mexico as well as the founder of Angstrom Thin Film Technologies LLC, USA. In recent years his researches focus on tuning nanostructures by ALD and plasma-ALD, and their applications in ultra-thin membranes for gas separation and selective ion transport. In 2011, one of his ultra- thin desalination membranes received the prestigious “R&D 100 Award” from R&D Magazine. In 2015, his liquideous CO2 separation membranes received another “R&D 100 Award” that was entitled “Green Technology Special Recognition Gold Award ”. Dr. Jiang has also been served as the symposium organizer/session chair and delivered invited talks for a number of major international conferences such as MRS meeting, ACS conferences etc.

E-mail: ybjiang@unm.edu