Effect of Inventory Change in a Liquid – Solid Circulating Fluidized Bed (LSCFB)
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Nirmala Gnanasundaram
,
Aswin Venugopal
Abstract
Circulating fluidized beds (CFB) play a major role in the chemical industry especially as heterogeneous catalytic reactors. Research on hydrodynamic properties of Liquid – Solid CFBs (LSCFB) is significantly under-reported as compared to Gas – Solid CFBs (GSCFB). Steadily, prominent research is being established in fields like food industry (whey protein recovery), waste management (removal of heavy metals from radioactive wastes) and others, which use LSCFBs. In this context, it is important to have significant knowledge about the changes occurring in hydrodynamic properties like solid hold-up, rate of solid circulation etc., on changing certain critical physical properties such as inventory height. An LSCFB of height 2.95 m and riser outer diameter 0.1 m was chosen and the effect of inventory height on the properties was studied by taking the initial inventory heights as 15 cm, 25 cm and 35 cm. The hydrodynamic studies concentrated on axial solid holdup, average solid holdup, solid circulation rate and slip velocity. On increasing the inventory, uniformity of axial solid holdup was confirmed along with studying holdup patterns. Solid flux was seen to follow an inverse relationship to holdup, as expected. The change in slip velocity with varying inventory was also checked, and was found to decrease with inventory. The distribution parameter, Co of the drift flux model was used to determine the extent of non-uniformity in solid distribution. Co was calculated to be less than unity in the range of 0.983–0.994, suggesting non-uniformity in solid distribution, with higher solid concentration by the walls compared to the core.
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© 2017 Walter de Gruyter GmbH, Berlin/Boston
Artikel in diesem Heft
- Editorial
- Editorial: Special Issue of 29th Symposium of Malaysian Chemical Engineers (SOMChE) 2016 – Process System Engineering
- Research Articles
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Artikel in diesem Heft
- Editorial
- Editorial: Special Issue of 29th Symposium of Malaysian Chemical Engineers (SOMChE) 2016 – Process System Engineering
- Research Articles
- Effect of Inventory Change in a Liquid – Solid Circulating Fluidized Bed (LSCFB)
- Simulation and Optimization of the Utilization of Triethylene Glycol in a Natural Gas Dehydration Process
- Development of Adaptive Soft Sensor Using Locally Weighted Kernel Partial Least Square Model
- Comparison of Turbulence Models for Single Sphere Simulation Study Under Supercritical Fluid Condition
- Integrated Palm Biomass Supply Chain toward Sustainable Management
- Multi-Scale Control of Bunsen Section in Iodine-Sulphur Thermochemical Cycle Process
- Optimisation of Design and Operation Parameters for Multicomponent Separation via Improved Lewis-Matheson Method
- The Effect of Various Components of Triglycerides and Conversion Factor on Energy Consumption in Biodiesel Production
- CFD Simulation on the Hydrodynamics in Gas-Liquid Airlift Reactor
- Analysis of the Steady-State Multiplicity Behavior for Polystyrene Production in the CSTR
- Numerical Studies on the Laminar Thermal-Hydraulic Efficiency of Water-Based Al2O3 Nanofluid in Circular and Non-Circular Ducts
- Simultaneous Carbon Capture and Reuse Using Catalytic Membrane Reactor in Water-Gas Shift Reaction
