Effect of axial gas dispersion on MTO light–olefin yield: Microreactor data

Tshabalala, Samuel N.; Squires, Arthur M.

doi:10.1002/aic.690421021

Cited by 13 publications

(3 citation statements)

References 11 publications

(7 reference statements)

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“…This is the then so-called and now hugely successful MTO process. As stated earlier, the bench-scale studies on the MTO process were carried out by researchers' at Mobil Oil Corporation (Chang et al 1984;Schoenfelder et al 1994;Tshabalala and Squires 1996), primarily over a ZSM-5 catalyst, in a fixed-bed configuration. The researchers' at Union Carbide were the first to show the excellent shape selectivity and control over a product distribution of light olefins, C 2 -C 4 over a novel SAPO-34 catalyst.…”

Section: Methanol-to-olefins (Mto) Processdiscovery and Developmentmentioning

confidence: 99%

Methanol-to-olefins process technology: current status and future prospects

Gogate¹

2019

Petroleum Science and Technology

107

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The methanol-to-gasoline (MTG) and methanol-to-olefins (MTO) process are 2 epochal technological discoveries in the synfuels arena, first introduced by Mobil Oil Corporation, some 50 years after the Fischer-Tropsch process. Apart from the technological breakthroughs, the MTG and MTO processes have also provided a rich tableau for scientific research and pursuits. In this report, we will first provide anecdotal information pertaining to the discovery and development of these 2 processes. We will then focus on how the MTO process has evolved into a stand-alone technology in its own right for the 2 value-added products, ethylene, and propylene.

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Section: Methanol-to-olefins (Mto) Processdiscovery and Developmentmentioning

confidence: 99%

Methanol-to-olefins process technology: current status and future prospects

Gogate¹

2019

Petroleum Science and Technology

107

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“…The latter is of special interest because it can shed light on the time response of shallow beds, where the column behaves as a solid block. Adequately tuning this time response may enhance the result of bulk solids management operations like vibratory transport, − vibrated bed dryers − and vibrated bed reactors. , …”

Section: Introductionmentioning

confidence: 99%

“…Adequately tuning this time response may enhance the result of bulk solids management operations like vibratory transport, 1−7 vibrated bed dryers 8−11 and vibrated bed reactors. 12,13 The simplest approximation to a vibrated bed is the wellknown inelastic bouncing ball model (IBBM). 14−16 The IBBM describes the motion of a single point mass, bouncing on a sinusoidally driven plate, considering completely inelastic collisions with the plate.…”

Section: ■ Introductionmentioning

confidence: 99%

Influence of Air on the Bouncing Dynamics of Shallow Vibrated Granular Beds: Kroll’s Model Predictions

Guerrero

Idler

Sánchez

2016

Ind. Eng. Chem. Res.

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In the present work, we explore the modification of the periodicity of the motion of shallow granular columns in the framework of Kroll's one-dimensional model for the motion of a vibrated bed. Within the model, bed dynamics depend on two parameters, the dimensionless maximum acceleration, Γ, and a dissipative parameter, α, depending on air viscosity, grain density, bed static porosity, oscillation frequency and grain diameter. We show how the bifurcation diagram for the flight time of the bed as a function of Γ changes with α. For α = 0, Kroll's prediction equals that of the inelastic bouncing ball model. When α is increased, bifurcations shift to higher Γ up to a point where not even a single bifurcation is predicted in a range of Γ where an inelastic bouncing ball displays several bifurcations. We also illustrate how the flight time reduces nonlinearly with increasing α in a monotonic way. We introduce isoperiodic maps to illustrate regions of single, double, or more periodicities in the phase space. We also show and discuss the dependence of the flight time on the parameters entering the definition of α within ranges of those parameters that have been explored in the literature. Grain diameter, grain density and vibration frequency are the most determinant.

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Chemical process opportunities for vibrated powders

Squires

2004

Powder Technology

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Effect of axial gas dispersion on MTO light–olefin yield: Microreactor data

Abstract: Pulsed-tracer experiments conducted for horizontal gas flow through a horizontal duct of rectangular cross section (height = 12.7 mm) containingpowder in the coherent-expanded vibrated-bed state have been reported Squires and Benge, 1995

Cited by 13 publications

References 11 publications

Methanol-to-olefins process technology: current status and future prospects

Methanol-to-olefins process technology: current status and future prospects

Influence of Air on the Bouncing Dynamics of Shallow Vibrated Granular Beds: Kroll’s Model Predictions

Chemical process opportunities for vibrated powders

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