Numerical Investigation of the Sorption Enhanced Steam Methane Reforming in a Fluidized Bed Reactor

Chao, Zhongxi; Wang, Yuefa; Jakobsen, Jana P.; Fernandino, María; Jakobsen, Hugo A.

doi:10.1016/j.egypro.2012.06.005

Cited by 30 publications

(13 citation statements)

References 12 publications

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“…More difficult problems arise in the case of additional heat and mass transfer between particles and fluid, possibly with simultaneous occurrence of chemical reactions. However, considering the SE‐SMR process, the chemical performance predicted by Wang et al., Chao et al., Wang et al . and Chao is of minor difference applying a two‐dimensional or three‐dimensional model approach.…”

Section: Resultsmentioning

confidence: 99%

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Numerical evaluation of a one‐dimensional two‐fluid model applied to gas–solid cold‐flows in fluidised beds

2013

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Computational demanding two‐ and three‐dimensional two‐fluid models are frequently adopted simulating gas–solid flows in fluidised beds. Reduced computational cost is favourable for efficient numerical studies of technologies such as the novel chemical looping combustion (CLC), chemical looping reforming (CLR), and sorption‐enhanced steam methane reforming (SE‐SMR) processes. In this study, we elucidate the potential of a one‐dimensional two‐fluid model to describe gas–solid cold‐flows in fluidised beds. The validity of the numerical simulation results of the bubbling beds and risers have been compared to experimental data in the literature. Moreover, sensitivity analyses on drag closure laws and operation condition have been performed and a number of model solution techniques and algorithms are studied. In addition, simulation results of the one‐dimensional model are compared to results of a two‐dimensional model. For particular sets of operating conditions and flow characteristics, the one‐dimensional model compares fairly well to the simulation results of the two‐dimensional model and to experimental data. Under other operating conditions, large quantitative deviations can be observed. However, the one‐dimensional model is assumed to be sufficently accurate for particular reactor process optimisation and design evaluations.

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Section: Resultsmentioning

confidence: 99%

“…Moreover, these authors further extended their work incorporating chemical reactions to study the SE‐SMR process . Furthermore, Chao et al . proposed a three‐phase flow model with the aim to investigate the effect of segregation in the SE‐SMR process.…”

Section: Introductionmentioning

confidence: 99%

Numerical evaluation of a one‐dimensional two‐fluid model applied to gas–solid cold‐flows in fluidised beds

2013

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“…The particle‐particle drag coefficient, in the fourth term on the right hand side of Equation (10), is modelled by the sum of a collisional part and a frictional part …”

Section: Model Equationsmentioning

confidence: 99%

“…In addition, the validation of this drag term was not performed in a sufficient manner. On the other hand, the present authors have derived and applied a three‐fluid model for modelling a SE‐SMR reactor using a validated binary particle‐particle drag model, hence, a more realistic sorbent‐catalyst segregation effect was predicted. Natural light dolomite with a density smaller than the catalyst particles was applied as a sorbent in this investigation.…”

Section: Introductionmentioning

confidence: 99%

Modelling of binary fluidized bed reactors for the sorption‐enhanced steam methane reforming process

et al. 2016

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A 1 m high laboratory‐scale and a 4 m high industrial‐scale sorption‐enhanced steam methane reforming (SE‐SMR) fluidized bed reactor were simulated using a three‐fluid model. The performance of the SE‐SMR process was compared with the steam methane reforming (SMR) process. The influences of the superficial gas velocities and the solid loading (packed bed heights) on the reactor performance (hydrogen purity) were studied. The simulation results show that a higher purity of the hydrogen product can be obtained in a SE‐SMR reactor. The superficial gas velocity is an important parameter. In the present study, it has been found that the binary sorbent‐catalyst particles are well mixed when the bed is operated at 0.2 m/s. The sorbent can adsorb CO2 steadily, thus the dry mole fraction of the hydrogen product can get above 0.95 in the 1 m laboratory‐scale bed, and above 0.97 in the 4 m industrial‐scale bed. However, when the laboratory scale bed is operated at a lower superficial gas velocity of 0.15 m/s, the binary sorbent‐catalyst particles are segregated. When the bed is operated at a higher superficial gas velocity of 0.3 m/s, the process work load is increased, and the gas residence time in the reactor is decreased. Therefore, the hydrogen product purity is further decreased. The simulation results also show that there is an optimal bed height limit for the 4 m industrial‐scale bed, at which further increase of the packed bed height cannot increase the hydrogen purity.

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“…Solid CO 2 falls onto a melt tray then this tray is warmed under pressure to allow the CO 2 to melt and the liquid CO 2 is poured out of the column. [82][83][84][85] Whilst this forgoes the need for additives, the equipment used is large and bulky so is problematic for offshore applications, though it has been successfully implemented at inland facilities such as the Shute Creek gas treating facility in Wyoming. 82 There is also more to be desired in the energy cost of the operation as the high pressures, 34 bar, and low temperatures, around -60 °C, that are required are expensive to maintain, leading to a hybrid systems that use CFZ in succession with the more traditional non-subliming methods.…”

Section: Distillationmentioning

confidence: 99%

Problems Associated with Sour Gas in the Oilfield Industry and Their Solutions

2015

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. (2015) 'The problems associated with sour gas in the oil eld industry and their solutions.', Energy fuels., 29 (8). pp. 4667-4682. Further information on publisher's website:http://dx.doi.org/10.1021/acs.energyfuels.5b00952Publisher's copyright statement:This document is the Accepted Manuscript version of a Published Work that appeared in nal form in Energy Fuels, copyright c 2015 American Chemical Society after peer review and technical editing by the publisher. To access the nal edited and published work see http://dx.doi.org/10.1021/acs.energyfuels.5b00952.Additional information:Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-pro t purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. AbstractFossil fuels are still a necessary and important part of modern living, keeping cars running and houses heated for example. As demands have risen and reservoirs of oil and natural gas have depleted, it has become increasingly more important to tap in to fields that were once classified as undesirable. Sour fields, fields high in acidic gases such as hydrogen sulfide and carbon dioxide, are one such option. There are many difficulties and dangers associated with working sour fields, such as toxicity of the sour gases, hydrate formation and corrosion of equipment that have prevented these resources being used in the past. Many varied methods of overcoming these problems have been developed, from removing the sour components to inhibiting their effects. This review highlights the major issues raised by sour fields as well as a wide range of solutions in use today.

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Numerical Investigation of the Sorption Enhanced Steam Methane Reforming in a Fluidized Bed Reactor

Cited by 30 publications

References 12 publications

Numerical evaluation of a one‐dimensional two‐fluid model applied to gas–solid cold‐flows in fluidised beds

Numerical evaluation of a one‐dimensional two‐fluid model applied to gas–solid cold‐flows in fluidised beds

Modelling of binary fluidized bed reactors for the sorption‐enhanced steam methane reforming process

Problems Associated with Sour Gas in the Oilfield Industry and Their Solutions

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