High-temperature attrition of sorbents and a catalyst for sorption-enhanced steam methane reforming in a fluidized bed environment

Johnsen, Kim; Grace, John R.

doi:10.1016/j.powtec.2007.01.005

Cited by 23 publications

(17 citation statements)

References 9 publications

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“…The mechanical strength of sorbents is estimated by an attrition resistance index test for 1-5 h (ARI 1 -ARI 5 ) of sorbents via the previous process. The results demonstrated that the prepared sorbents exhibited ARI 1-5 values of 0.1-0.2, which indicated the favorable anti-attrition characteristics of sorbents [23,24]. In other words, the recovery of samples can be as high as at least 99 % that was noted as the almost mass of the original particles recovered under fluidized conditions.…”

Section: Sorbent Characteristicsmentioning

confidence: 81%

Development of a Scalable Method for Manufacturing High‐Temperature CO₂ Capture Sorbents

Chen

2013

Chem Eng & Technol

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An engineered process for scalable manufacture of a calcium aluminum carbonate CO 2 sorbent with production amounts of about 1000 g per hour has been developed. The process includes mixing and heating, solid-liquid separation, drying and extrusion, crushing and conveying, and calcined molding steps. The sorbent preparation involves the coprecipitation of Ca 2+ , Al 3+ , and CO 3 2under alkaline conditions. By adjusting the Ca:Al molar ratio, a series of Ca-rich materials could be synthesized for use as CO 2 sorbents at 750°C. A calcium acetate-derived sorbent exhibited better cyclic stability than sorbents originating from CaCl 2 and Ca(NO 3 ) 2 . The initial sorption capacity increased with CaO concentration. High stability of more than 90 % was maintained by the Ca:Al sorbents after 40 looping tests.

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Section: Sorbent Characteristicsmentioning

confidence: 81%

Development of a Scalable Method for Manufacturing High‐Temperature CO₂ Capture Sorbents

Chen

2013

Chem Eng & Technol

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“…On the other hand, CaO‐based materials, which can be obtained from abundant natural resources (dolomite and limestone), have fast kinetics and favorable thermodynamics for removing CO 2 from reforming atmosphere 26. Limestone has greater stoichiometric capacity than dolomite (0.79 and 0.46 g CO 2 g −1 acceptor, respectively), and a better resistance to attrition 35. However, dolomite has shown better multi‐cycle performance than limestone 11, 35–37.…”

Section: Methodsmentioning

confidence: 99%

“…Limestone has greater stoichiometric capacity than dolomite (0.79 and 0.46 g CO 2 g −1 acceptor, respectively), and a better resistance to attrition 35. However, dolomite has shown better multi‐cycle performance than limestone 11, 35–37. The multi‐cycle carbonation–calcination performance of CaO‐based sorbents has been studied extensively, and the results revealed a significant decrease in pore volume and surface area as the main cause of capacity degradation 11, 37–40.…”

Section: Methodsmentioning

confidence: 99%

Sorption enhanced steam reforming (SESR): a direct route towards efficient hydrogen production from biomass‐derived compounds

Fermoso

Chen

2012

J of Chemical Tech & Biotech

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OVERVIEW: Efficient conversion of biomass to hydrogen is imperative in order to realize sustainable hydrogen production. Sorption enhanced steam reforming (SESR) is an emerging technology to produce high purity hydrogen directly from biomass‐derived oxygenates, by integrating steam reforming, water‐gas shift and CO2 separation in one‐stage. Factors such as simplicity of the hydrogen production process, flexibility in feedstock, high hydrogen yield and low cost, make the SESR process attractive for biomass conversion to fuels. IMPACT: Recent work has demonstrated that SESR of biomass‐derived oxygenates has greater potential than conventional steam reforming for hydrogen production. The flexibility of SESR processes resides in the diversity of feedstocks, which can be gases (e.g. biogas, syngas from biomass gasification), liquids (e.g. bioethanol, glycerol, sugars or liquid wastes from biomass processing) and solids (e.g. lignocellulosic biomass). SESR can be developed to realize a simple biomass conversion process but with high energy efficiency. APPLICATIONS: Hydrogen production by SESR of biomass‐derived compounds can be integrated into existing oil refineries and bio‐refineries for hydrotreating processing, making the production of gasoline and diesel greener. Moreover, hydrogen from SESR can be directly fed to fuel cells for power generation. Copyright © 2012 Society of Chemical Industry

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“…Unstable adsorbents can lead to lower equilibrium hydrogen yields. 107 For fluidized bed operations, resistance to attrition 108 is an important parameter and largely governs the performance of the adsorbant and the process as a whole. The mode used for desorption and its assessment in terms of energy requirement and time of regeneration are also important to achieve better design and performance.…”

Section: Sorption Enhanced Steam Methane Reformingmentioning

confidence: 99%

Process intensification aspects for steam methane reforming: An overview

2009

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Steam methane reforming (SMR) is the most widely used process in industry for the production of hydrogen, which is considered as the future generation energy carrier. Having been perceived as an important source of H2, there are abundant incentives for design and development of SMR processes mainly through the consideration of process intensification and multiscale modeling; two areas which are considered as the main focus of the future generation chemical engineering to meet the global energy challenges. This article presents a comprehensive overview of the process integration aspects for SMR, especially the potential for multiscale modeling in this area. The intensification for SMR is achieved by coupling with adsorption and membrane separation technologies, etc., and using the concept of multifunctional reactors and catalysts to overcome the mass transfer, heat transfer, and thermodynamic limitations. In this article, the focus of existing and future research on these emerging areas has been drawn. © 2009 American Institute of Chemical Engineers AIChE J, 2009

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High-temperature attrition of sorbents and a catalyst for sorption-enhanced steam methane reforming in a fluidized bed environment

Cited by 23 publications

References 9 publications

Development of a Scalable Method for Manufacturing High‐Temperature CO₂ Capture Sorbents

Development of a Scalable Method for Manufacturing High‐Temperature CO₂ Capture Sorbents

Sorption enhanced steam reforming (SESR): a direct route towards efficient hydrogen production from biomass‐derived compounds

Process intensification aspects for steam methane reforming: An overview

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High-temperature attrition of sorbents and a catalyst for sorption-enhanced steam methane reforming in a fluidized bed environment

Cited by 23 publications

References 9 publications

Development of a Scalable Method for Manufacturing High‐Temperature CO2 Capture Sorbents

Development of a Scalable Method for Manufacturing High‐Temperature CO2 Capture Sorbents

Sorption enhanced steam reforming (SESR): a direct route towards efficient hydrogen production from biomass‐derived compounds

Process intensification aspects for steam methane reforming: An overview

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Development of a Scalable Method for Manufacturing High‐Temperature CO₂ Capture Sorbents

Development of a Scalable Method for Manufacturing High‐Temperature CO₂ Capture Sorbents