PDF Publication Title:
Text from PDF Page: 088
improvement and optimization of novel PSA cycle configurations for H2 purification and CO2 removal. Cen et al. [42] studied a bench-scale 1-bed 4-step PSA process, with activated carbon as the adsorbent, to remove CO2 from a feed mixture comprising 24.75% CO2, 24.75% H2, and 0.0001% H2S. Whysall and Wagemans [199] increased the H2 production capacity by extending the purge step in their 16-bed 13-step PSA cycle. Baksh et al. [18, 19] developed a simple 2-bed 12-step process which used layered beds packed with alumina, activated carbon and zeolite. With this configuration they were able to recover 76% H2 at a very high purity level of 99.996%. Xu et al. [204] developed a 6-bed 16-step PSA process in which only four pressure equalization steps were incorporated. Zhou et al. [213] proposed a 4-bed 13-step PSA cycle and explored the idea of using buffer tanks to carry out pressure equalization during the cycle. Jiang et al. [100] optimized a 5-bed 11-step PSA process, using layered beds of activated carbon and zeolite 5A, and were able to achieve a hydrogen recovery of around 89% with CO impurity as low as 10 ppm in the hydrogen product stream. Jee et al. [98] studied the adsorption characteristics of various permutations of mixtures composed of H2/CH4/CO/N2/CO2, on a layered bed packed with activated carbon and zeolite 5A, and concluded activated carbon to be a suitable adsorbent for CO2 extraction. Warmuzinski and coworkers [196] designed a 5- bed 8-step PSA process through rigorous mathematical simulation, for which they obtained a recovery of 74% for H2, as well as 92% for methane in the tail gas stream. They also verified their results using bench-scale experimentation [184]. Yang et al. [208] studied a 4-bed 9- step cycle experimentally and theoretically using layered beds of activated carbon and zeolite 5A, and recovered 66% of H2 from syngas at 99.999% purity. Ritter and Ebner [152] provide a comprehensive review on the use of adsorption technologies for H2 production and CO2 removal. In all the PSA cycles developed so far, the weakly adsorbed hydrogen (or the light-product) in the mixture is the desired product, and enriching the strongly adsorbed CO2 (or the heavy- product) is not a concern. On the other hand, for CO2 sequestration, it is necessary to concentrate CO2 to a high purity. The adsorbents designed to date preferentially adsorb 5.1 Introduction and Previous Work Chapter 5. Superstructure Case Study: Pre-combustion CO2 Capture 74PDF Image | Design and Operation of Pressure Swing Adsorption Processes
PDF Search Title:
Design and Operation of Pressure Swing Adsorption ProcessesOriginal File Name Searched:
anshul_thesis.pdfDIY PDF Search: Google It | Yahoo | Bing
CO2 Organic Rankine Cycle Experimenter Platform The supercritical CO2 phase change system is both a heat pump and organic rankine cycle which can be used for those purposes and as a supercritical extractor for advanced subcritical and supercritical extraction technology. Uses include producing nanoparticles, precious metal CO2 extraction, lithium battery recycling, and other applications... More Info
Heat Pumps CO2 ORC Heat Pump System Platform More Info
CONTACT TEL: 608-238-6001 Email: greg@infinityturbine.com (Standard Web Page)