Development of oxygen transport membranes for coal-based power generation

Rosen, Lee; Degenstein, Nick J.; Shah, Minish; Wilson, J.S.; Kelly, Sean; Peck, J.S.; Christie, Max

doi:10.1016/j.egypro.2011.01.115

Cited by 18 publications

(11 citation statements)

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“…Diffusive mass transport across the porous membrane was induced by injecting pure N2 on the outside and a pure fuel gas on the inside of the porous support layer. Fuel gases considered here included CH4, CO and CO2 to be commensurate to the planned usage of the OTM for natural gas reformation and combustion (Rosen et al, 2011). Hydrogen was not tested due to the inconsistent results observed in our previous work (Tjaden et al, 2016b).…”

Section: Diffusion Cell Experimentsmentioning

confidence: 99%

Contradictory concepts in tortuosity determination in porous media in electrochemical devices

Tjaden

Finegan

Lane³

et al. 2017

Chemical Engineering Science

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Porous media are a vital component in almost every electrochemical device in the form of electrode, support or gas diffusion layers. Microstructural parameters of porous layers such as tortuosity, porosity and pore size diameter are of high importance and crucial for diffusive mass transport calculations. Among these parameters, the tortuosity remains ill-defined in the field of electrochemistry, resulting in a wide range of different calculation approaches. Here, we present a systematic approach of calculating the tortuosity of different porous samples using image and diffusion cell experimental-based methods. Image-based analyses include a selection of geometric and flux-based tortuosity calculation algorithms. Differences between the image and diffusion cell-based results are encountered and attributed to the small pore diameters and thereby induced Knudsen effects within the samples which govern the diffusion flux. Highlights Microstructural analysis of oxygen transport membrane porous supports.  Correlative tortuosity determinations via X-ray tomography and diffusion cell experiments.  Evaluation of the effect of tortuosity, porosity and sample thickness on diffusion resistance.  Visible differences between different tortuosity calculation approaches are encountered.  Diffusion cell experiments yield the highest and geometric-based image quantification algorithms result in the lowest tortuosity values.

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Section: Diffusion Cell Experimentsmentioning

confidence: 99%

Contradictory concepts in tortuosity determination in porous media in electrochemical devices

Tjaden

Finegan

Lane³

et al. 2017

Chemical Engineering Science

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“…The calculated cost of hydrogen is significantly lower than the DoE announced goal of $3.00/kg in 2005. [11,12] Biomass Pretreatment Drying using vapor recompression and size reduction by milling…”

Section: Discussionmentioning

confidence: 99%

“…Current research and development activity for advancing IGCC technology include membrane based air separation [11,12] to separate O 2 at high temperatures, warm gas cleanup processes to remove pollutants and CO 2 at relatively high temperatures [13,14], and advanced gas turbines to serve as high efficiency power generators [15]. In order to fully realize the benefits of these advanced technologies, it is imperative to identify plant integration concepts that not only improve the efficiency of one single unit of the plant, but also provide synergistic enhancement of the overall plant efficiency and process economics.…”

Section: Introductionmentioning

confidence: 99%

Coproduction of transportation fuels in advanced IGCCs via coal and biomass mixtures

2015

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“…Several U.S. Patents have been resulted from these developments [11,12], specially an OTM boiler that enables steam generation and power cycle with CCS [13][14][15], and an OTM syngas system for autothermal reforming of NG enabling downstream synthesis and oxycombustion power cycle [16]. (oxycombustion).…”

Section: Introduction and Technology Surveymentioning

confidence: 99%

Oxygen transport membranes in a biomass/coal combined strategy for reducing CO 2 emissions: Permeation study of selected membranes under different CO 2 -rich atmospheres

et al. 2015

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ElsevierGarcía Fayos, J.; Vert Belenguer, VB.; Balaguer Ramirez, M.; Solis Díaz, C.; Gaudillere, CC.; Serra Alfaro, JM. (2015). Oxygen transport membranes in a biomass/coal combined strategy for reducing CO2 emissions: Permeation study of selected membranes under different CO2-rich atmospheres. Catalysis Today. 257 (2) AbstractThis contribution introduces how the integration of biomass as fuel in power plants would balance CO2 emissions and the related role of oxygen transport membranes (OTM) on it. CO2 capture techniques could be introduced to minimize CO2 emissions at the cost of a substantial energy penalty in the overall process. Among the different approaches, the use of pure O2and/or N2-free oxidation gases for combustion and/or for gasification leads to promising energy efficiencies. Ceramic OTM membranes could be successfully integrated in such thermal processes, which enable to increase the net plant efficiency when CO2 capture is implemented.Further, this work reviews how selected ceramic materials and membrane architectures behave under CO2 containing atmospheres at high temperatures above 700 ºC. These conditions have been selected for checking the viability of these compositions and configurations to fit in an oxy-co-gasification process, involving coal and biomass. The tested asymmetric membranes present promising oxygen fluxes in the range 0.6-1.2 ml·min -1 ·cm -2 when using 100% CO2 as sweep gas at 850 ºC (optimal membrane operation conditions in oxyfuel power plant) and stable oxygen production up to 100 hours of continuous operation in similar conditions. Specifically, La0.6Sr0.4Co0.2Fe0.8O3-δ and NiFe2O4 -Ce0.8Tb0.2O2-δ composite materials showed the best results for oxygen permeation and time stability under CO2-rich atmospheres.

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Development of oxygen transport membranes for coal-based power generation

Cited by 18 publications

References 0 publications

Contradictory concepts in tortuosity determination in porous media in electrochemical devices

Contradictory concepts in tortuosity determination in porous media in electrochemical devices

Coproduction of transportation fuels in advanced IGCCs via coal and biomass mixtures

Oxygen transport membranes in a biomass/coal combined strategy for reducing CO 2 emissions: Permeation study of selected membranes under different CO 2 -rich atmospheres

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