Evaluation of a novel gas-liquid contactor/reactor system for natural gas applications

El‐Naas, Muftah H.; Mohammad, Ameera F.; Suleiman, Mabruk I.; Musharfy, Mohamed Al; Al‐Marzouqi, Ali H.

doi:10.1016/j.jngse.2017.01.031

Cited by 19 publications

(13 citation statements)

References 17 publications

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“…In addition, the gas was reported to be perfectly distributed into the reactor and hence improved the mass and heat transfer between phases [ 4 ]. The inert particles used in the contact system previously [ 1 ] were made of polymethyl methacrylate with an average particle diameter of 0.013 m, density of 1020 kg/m 3 , surface area of 4.92 cm 2 /particle, and sphericity of 1.0; these particles were also used in the present study. In the discrete phase model, the trajectory of the particles was tracked using the Newtonian equation of motion [ 5 , 22 ]:

where

is the resistance impacting on a unit-mass particle and

represents the air resistance impacting on the particle

where

is the fluid velocity,

is the particle velocity,

is the fluid molecular viscosity,

is the fluid density,

is the particle density, and

is the particle diameter.…”

Section: Cfd Simulationmentioning

confidence: 99%

“…In addition, the gas was reported to be perfectly distributed into the reactor and hence improved the mass and heat transfer between phases [4]. The inert particles used in the contact system previously [1] were made of polymethyl methacrylate with an average particle diameter of 0.013 m, density of 1020 kg/m 3 , surface area of 4.92 cm 2 /particle, and sphericity of 1.0; these particles were also used in the present study. In the discrete phase model, the trajectory of the particles was tracked using the Newtonian equation of motion [5,22]:…”

Section: Mixing Particlesmentioning

confidence: 99%

“…The system was developed and tested by El-Naas et al. [ 1 , 2 ] for the reaction of CO 2 with ammoniated brine. The interfacial area, mass and heat transfer were found to be enhanced by the addition of mixing particles [ 3 ].…”

Section: Introductionmentioning

confidence: 99%

“…RSM has also been reported to be more effective in revealing the factors that most strongly contribute to the regression coefficient and in identifying insignificant quadratic terms. The main objective of the present work is to optimize the hydrodynamic parameters of the IPSBR [ 1 , 2 , 5 ]. CFD simulation has been combined with RSM to study the effect of the feed-gas velocity, orifice diameter, gas head, diameter of mixing particles, and the mixing particles loading on the average air velocity distribution and gas volume fraction in the IPSBR.…”

Section: Introductionmentioning

confidence: 99%

“…Inert particles spouted bed reactor (IPSBR) is a special case of a spouted bed, where a gas jet is injected at the bottom of a conical vessel containing liquid and coarse inert particles. The system was developed and tested by El-Naas et al [1,2] for the reaction of CO 2 with ammoniated brine. The interfacial area, mass and heat transfer were found to be enhanced by the addition of mixing particles [3].…”

Section: Introductionmentioning

confidence: 99%

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CFD and statistical approach to optimize the average air velocity and air volume fraction in an inert-particles spouted-bed reactor (IPSBR) system

Mohammad

Mourad

Al‐Marzouqi

et al. 2021

Heliyon

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Inert-particles spouted bed reactor (IPSBR) is characterized by intense mixing generated by the circular motion of the inert particles. The operating parameters play an important role in the performance of the IPSBR system, and therefore, parameter optimization is critical for the design and scale-up of this gas–liquid contact system. Computational fluid dynamics (CFD) provides detailed modeling of the system hydrodynamics, enabling the determination of the operating conditions that optimize the performance of this contact system. The present work optimizes the main IPSBR operating parameters, which include a feed-gas velocity in the range 0.5–1.5 m/s, orifice diameter in the range 0.001–0.005 m, gas head in the range 0.15–0.35 m, mixing-particle diameter in the range 0.009–0.0225 m, and mixing-particle to reactor volume fraction in the range 2.0–10.0 vol % (which represents 0.01–0.1 kg of mixing particles loading). The effects of these parameters on the average air velocity and average air volume fraction in the upper, middle, and conical regions of the reactor were studied. The specific distance for each region has been measured from the orifice point to be 50 mm for the conical region, 350 mm for the middle region and 550 mm for the upper rejoin. The selected factors were optimized to obtain the minimum air velocity distribution (maximum gas residence time) and the maximum air volume fraction (maximum interfacial area concentration) because these conditions will increase the gas holdup, the gas–liquid contact area, and the mass transfer coefficient among phases. Response surface methodology (RSM) was used to determine the optimum operating conditions. The regression analysis showed an excellent fit of the experimental data to a second-order polynomial model. The interaction between the process variables was evaluated using the obtained three-dimensional surface plots. The analysis revealed that under the optimized parameters of a feed-gas velocity of 1.5 m/s, orifice diameter of 0.001 m, gas head of 0.164 m, mixing-particle diameter of 0.0225 m, and mixing-particle loading of 0.02 kg, the minimum average air velocity and highest air volume fraction were observed throughout the reactor.

show abstract

where

is the resistance impacting on a unit-mass particle and

represents the air resistance impacting on the particle

where

is the fluid velocity,

is the particle velocity,

is the fluid molecular viscosity,

is the fluid density,

is the particle density, and

is the particle diameter.…”

Section: Cfd Simulationmentioning

confidence: 99%

“…In addition, the gas was reported to be perfectly distributed into the reactor and hence improved the mass and heat transfer between phases [4]. The inert particles used in the contact system previously [1] were made of polymethyl methacrylate with an average particle diameter of 0.013 m, density of 1020 kg/m 3 , surface area of 4.92 cm 2 /particle, and sphericity of 1.0; these particles were also used in the present study. In the discrete phase model, the trajectory of the particles was tracked using the Newtonian equation of motion [5,22]:…”

Section: Mixing Particlesmentioning

confidence: 99%