Ying-Bing Jiang
Univ. of New Mexico, USA
Title: Ultra thin membrane made by Atomic layer deposition for CO2 separation
Biography
Biography: Ying-Bing Jiang
Abstract
The global organic biogas market was worth more than $19.5 billion (???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 ???plasma-defined??? 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.???B. Jiang, et al, and C. Brinker (2018), Bio???inspired ultrathin enzymatic nano???stablized liquid membrane for CO2 capture, Nature Communication (accepted, in press) 2. Fu, Y; Y.???B. Jiang, et al and C. Brinker (2014), Atomic Layer Deposition of L???Alanine Polypeptide. J. of Am. Chem. Soc., Vol 136 : p15821???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???6558 4. Liu, H. et al, Jiang Y.???B. 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??? RSC ADVANCES Vol 6 (71) 66712???66720 201 5. Moghaddam S, et al, Jiang YB et al (2010), An inorganic???organic proton membrane for fuel cells with a controlled nanoscale pore structure??? Nature Nanotechnology, Vol. 5, 230???236