extraction of water from air using activated alumina balls
TRANSCRIPT
GREEN TECHNOLOGY AND CHEMISTRYAn Innovative way to extract water from air by hygroscopic material. Authors: 1: Tanvay Shinde 2: Saurabh Deshpande
CHEMICAL Thadomal Shahani Engineering College
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Table of contents Importance of water What are hygroscopic Elements? Relative Humidity Why Activated alumina? Procedure Calculations Observation and Mechanism Future Prospects Conclusion Acknowledgements Bibliography
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IMPORTANCE OF WATER
Most important substance
Primary usesSecondary usesProblems
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Water problemsImprovements over
the decades for water availability
Large population is left without water
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INTRODUCTION
How to solve this problem?
Alternate Ways to solve the problem
1)Reverse water gas reaction 2)Moisture from air
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RELATIVE HUMIDITY What is Relative Humidity units for Relative Humidity are
gm/m3. Example, if the actual vapor density
is 10 g/m3 at 20°C compared to the saturation vapor density at that temperature of 17.3 g/m3 , then the relative humidity is
R.H= 10/17.3* 100= 57.8%
Source: www.mumbaitemperature.com
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Hygroscopic ElementsWhat are hygroscopic elements ?
Examples:
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Hygroscopic ElementsVarious elements studied
Material used Observation1)Calcium Chloride Forms a slurry 2)Silica Gel Does not have a high
adsorbing power3)Activated Alumina Does not react with
moisture
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Activated Alumina(Al2O3)How is Alumina Activated ?Uses
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Activated AluminaPhysical Properties
Size 3-6 mm
Colour ivory
Total Pore Volume 0.80
Melting point 2072deg C
Thermal conductivity 30 W/mk
Surface area 200m^2/g
Bulk density 641kg/m^3
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Procedure
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Calculations
Flow rate of coolant : 1.30 lpmAmount of hygroscopic element :
1kgTemperature of vacuum oven :
200deg CPressure used in Vacuum Pump:
560 mm of Hg. 12
ObservationsTests from our sample Standard Drinking
Water Quality
PH: 8.0 PH: 6.5-8.5
Hardness (by EDTA method): 170ppm
Hardness: 200 ppm
Turbidity: 3.1 NTU Turbidity: 5 NTU
Colour : Transperant Colour : Transparent
Odour : Odourless Odour : odourless
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COST FACTOR1 Kg of Activated Alumina = Rs 20-23It can be reused several times 1 bottle of water = Rs 15 - 20Since alumina is reusable in the long
run it becomes more viable.Electricity required for extraction is
mainly used by the Vacuum Pump. We are working on better ways for reducing this cost, like solar energy , etc.
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Future prospects Energy Efficient
Application of Nanotechology
Process Type
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Why this method ?Factors OUR METHOD DESALINATION
PROBLEMS Variations in Relative Humidity
Water pollution(BRINE)
Fails to remove harmful chemicals from drinking water
POWER CONSUMPTION
Comparatively low High
ConclusionsThe basic aim of extracting water
from moisture was done with the help of hygroscopic element alumina.
Comparing the Standard Water conditions and our conditions, we conclude that our sample can be made potable with Treatment.
If future prospects are met we can make our product industry viable. 17
ACKNOWLEDGEMENTS
WE WOULD LIKE TO THANK DR. S.J. PUROHIT FOR HER MORAL
SUPPORT AND HELP.
A SPECIAL THANKS TO DR. PARAG SUTAR ANDMRS. ANJALI KIRKIRE FOR GUIDANCE AND LAB ASSISTANCE
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Copy Rights This Reasearch was done under
guidance Dr: Parag Sutar (ICT) and Dr: S.J.Purohit
The Research Paper is published with ISBN 978-81-904760-8-9
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THANK YOU
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