International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395 -0056
Volume: 04 Issue: 05 | May -2017
p-ISSN: 2395-0072
www.irjet.net
Vapour Adsorption and Recovery using Fluidized Bed Reactor: A Study Omkar J.Gawas1, Sahil D.Thool2, Anand A.Dubey3, Indrajit N.Yadav4 1, 2, 3 B.E.
Chemical Engineering Students
4Assistant
Professor Department of Chemical Engineering, Bharati Vidyapeeth College of Engineering, Sector-7, Belpada, Navi Mumbai-400614, India. ---------------------------------------------------------------------***---------------------------------------------------------------------
Abstract - Organic vapors cannot be vented to atmosphere directly. Their toxic effect needs to be suppressed or treated before venting it to the atmosphere. TCE is one of the pollutant which harms environment. So their toxicity should be minimized and try to avoid their direct entry into the atmosphere. Currently various organic vapours is being absorbed and recovered using adsorption which is generally carried out in cyclic batch process. The present work deals with the study of adsorption and recovery of TCE (the two important processes which play a vital role in process industries) in a Modified Fluidized Bed Reactor using activated carbon bed. The concept that is used behind the designing of the Modified Fluidized bed is being studied for the adsorption and recovery of TCE. The Computational Fluid Dynamics associated with the reactor is also studied. Considering the vast application of CFD, the external column of the reactor section is considered for computation and is being studied for different sets of velocities. The velocity and pressure contours are generated for the study of the fluid behaviour within the column to check for the negative pressure generation just below the expander section. Key Words: Trichloroethylene (TCE), Pollutant, Fluidised bed Reactor, Adsorption, Recovery
1. INTRODUCTION
|
2. Materials and Operating Conditions: The facilities required for the proposed project work are: 1. Fluidized bed reactor setup. 2. Condensing system. 3. Storage Tank. 2.1 Materials: The materials used for the trial includes activated carbon having hydrodynamic radius between 0.25 to 5mm possessing high abrasion resistance and high thermal stability[4]. The fluid used is TCE (Trichloroethylene) which is synthetic, light sensitive having chloroform like odor [5]. 2.2 Apparatus:
Adsorption and Recovery are two of the important industrial processes that are widely used for various mass transfer operations. Mass transfer is the net movement of mass from one location, usually meaning stream, phase, fraction or component, to another [1]. Mass transfer occurs in many processes, such as absorption, evaporation, adsorption, drying, precipitation, membrane filtration, and distillation etc. Adsorption is the adhesion of atoms, ions, or molecules from a gas, liquid, or dissolved solid to a surface.[2] This process creates a film of the adsorbate on the surface of the adsorbent. This process differs from absorption, in which a fluid (the absorbate) is dissolved by or permeates a liquid or solid (the absorbent), respectively.[3] Adsorption is a surface-based process while absorption involves the whole volume of the material. Recovery is the evaluation of the completeness with which an initial raw material is used in separation technological processes(including concentration of mineral products, metallurgical processes and processes involving chemical technology).A raw material in technological processes is Š 2017, IRJET
never completely separated into its constituent elements or compounds but rather the concentration of substances in the material changes upto the present value ,the recovery depends upon the initial concentration. Currently the organic vapours are adsorbed and recovered using the adsorption which is carried out in cyclic batch manner (adsorption and recovery in separate column) which is pretty time consuming and costly. So a research is ongoing to carry out this two processes within the same system .This would not only benefit the efficiency of the process but would also provide an alternative to the current one.
Impact Factor value: 5.181
|
The Modified Fluidized Bed Setup (Made from SS316L) comprising up of heating system within was used for the study of the concept used for behind the design of the Modified Fluidized Bed Reactor.
ISO 9001:2008 Certified Journal
|
Page 394