Design and cold flow testing of a Gas-Solid Vortex Reactor demonstration unit for biomass fast pyrolysis

Gonzalez‐Quiroga, Arturo; Reyniers, Pieter; Kulkarni, Shekhar R.; Torregrosa, María M.; Perreault, Patrice; Heynderickx, Geraldine; Geem, Kevin Van; Marin, Guy

doi:10.1016/j.cej.2017.06.003

Cited by 61 publications

(39 citation statements)

References 61 publications

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“…Unit‐1 used in the experiments is described in detail in previous publications . The fluidizing gas is fed to the jacket through a single gas inlet.…”

Section: Experimental Setupsmentioning

confidence: 99%

“…The GVU and GSVU studies explored and demonstrated various process intensification capabilities of vortex units. Based on a full hydrodynamic study of the GSVUs, research was extended to explore the possibilities of this technology to be used as a GSVR, for example, catalytic cracking, biomass fast pyrolysis, oxidative coupling of methane (OCM), and more. A multi‐inlet vortex reactor which operates on similar principles as that of the GSVRs, has been shown useful in production of functional nanoparticles .…”

Section: Introductionmentioning

confidence: 99%

“…During the gas‐only flow, gas undergoes multiple rotations inside the unit before exiting via the central gas exhaust. Depending on the gas velocities at the mouth of the gas inlet slots, unit dimensions, and so on the gas residence times in the unit are in the range 10–50 ms . The average gas residence time does not change from gas‐only to gas–solid flows, only the gas residence time distribution in the unit changes.…”

Section: Introductionmentioning

confidence: 99%

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An experimental and numerical study of the suppression of jets, counterflow, and backflow in vortex units

et al. 2019

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Vortex units are commonly considered for various single and multiphase applications due to their process intensification capabilities. The transition from gas-only flow to gas-solid flow remains largely unexplored nonetheless. During this transition, primary flow phenomenon, jets, and secondary flow phenomena, counterflow and backflow, are substantially reduced, before a rotating solids bed is established.This transitional flow regime is referred to as the vortex suppression regime. In the present work, this flow transition is identified and validated through experimental and computational studies in two vortex units with a scale differing by a factor of 2, using spherical aluminum and alumina particles. This experimental data supports the proposed theoretical particle monolayer solids loading that allows estimation of vortex suppression regime solids capacity for any vortex unit. It is shown that the vortex suppression regime is established at a solids loading theoretically corresponding to a monolayer being formed in the unit for 1g-Geldart D-and 1g-Geldart B-type particles. The model closely agrees with experimental vortex suppression range for both aluminum and alumina particles. The model, as well as the experimental data, shows that the flow suppression regime depends on unit dimensions, particle diameter, and particle density but is independent of gas flow rate.This combined study, based on experimental and computational data and on a theoretical model, reveals the vortex suppression to be one of the basic operational parameters to study flow in a vortex unit and that a simple monolayer model allows to estimate the needed solids loading for any vortex device to induce this flow transition. K E Y W O R D Sgas-solid vortex reactor, gas-solid vortex units, monolayer model, process intensification, vortex suppression regime Abbreviations: GSVR, gas-solid vortex reactor; GSVU, gas-solid vortex unit; GVU, gasvortex unit; HDPE, high density polyethylene.

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“…Unit‐1 used in the experiments is described in detail in previous publications . The fluidizing gas is fed to the jacket through a single gas inlet.…”

Section: Experimental Setupsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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An experimental and numerical study of the suppression of jets, counterflow, and backflow in vortex units

et al. 2019

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“…Furthermore, the high centrifugal forces cause separation of the fluids with different densities while at the same time there will be a low-pressure zone where the hydrogen can be removed. 227 Currently these reactors have not been tested for any dehydrogenation reaction discussed above but conceptually they could provide a promising pathway for onboard dehydrogenation of hydrogen carriers.…”

Section: Reactor Developmentmentioning

confidence: 99%

Challenges in the use of hydrogen for maritime applications

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Laffineur

Campe

et al. 2021

Energy Environ. Sci.

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“…The toroidal fluidized bed reactor is a special type of fluidized bed reactor, with a gas distribution system that consists of angled blades, located at the bottom of the reactor [20]. This arrangement allows intensification of the bed performance [21,22], i.e., intensification of heat and mass transfer [20,21] as well as improved mixing [21,23,24]. This is due to the vortex flow pattern and is characteristic for all vortex reactors [24][25][26][27].…”

Section: Toroidal Bed Reactormentioning

confidence: 99%

Drying of Lignite of Various Origins in a Pilot Scale Toroidal Fluidized Bed Dryer using Low Quality Heat

et al. 2019

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An experimental study was carried out for lignites of different places of origin, i.e., Poland, Greece, Romania and Australia, using a toroidal bed dryer. The effect of the temperature on the drying efficiency, including the loss of moisture content over time under fixed drying conditions was the subject of the investigation. The main goal was to confirm the possibility of the use of a toroidal bed as a base for a drying system that could utilize low quality heat from sources such as flue gases from a boiler and determine the optimum parameters for such a system. The conducted study has conclusively proven the feasibility of the use of low temperature heat sources for drying lignite in a toroidal bed. A moisture content of 20% could be achieved for most of the tested lignites, using the toroidal bed, with reasonably short residence times (approx. 30 min) and an air temperature as low as 60 °C. Moreover, the change of the particle size distribution, to some degree, affected the final moisture content due to the entrainment of wet, fine particles. The study also determined that the in-bed attrition of the particles is partially responsible for the generation of fines.

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Design and cold flow testing of a Gas-Solid Vortex Reactor demonstration unit for biomass fast pyrolysis

Cited by 61 publications

References 61 publications

An experimental and numerical study of the suppression of jets, counterflow, and backflow in vortex units

An experimental and numerical study of the suppression of jets, counterflow, and backflow in vortex units

Challenges in the use of hydrogen for maritime applications

Drying of Lignite of Various Origins in a Pilot Scale Toroidal Fluidized Bed Dryer using Low Quality Heat

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