This method is an innovative way to produce water from air using activated alumina balls. Activated alumina balls acts as hygroscopic material in this experiment.Research was done on college apparatus and results were noted.

1. GREEN TECHNOLOGY
AND CHEMISTRY
An 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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2. 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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3. IMPORTANCE OF WATER
 Most important
substance
 Primary uses
 Secondary uses
 Problems
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4. Water problems
 Improvements over the
decades for water
availability
 Large population is left
without water
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5. 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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6. 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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7. Hygroscopic Elements
 What are hygroscopic elements ?
 Examples:
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8. Hygroscopic Elements
 Various elements studied
Material used Observation
1)Calcium Chloride Forms a slurry
2)Silica Gel Does not have a high
adsorbing power
3)Activated Alumina Does not react with
moisture
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9. Activated Alumina(Al2O3)
 How is Alumina Activated ?
 Uses
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10. Activated Alumina
Physical 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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11. Procedure
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12. Calculations
 Flow rate of coolant : 1.30 lpm
 Amount of hygroscopic element : 1kg
 Temperature of vacuum oven : 200deg
C
 Pressure used in Vacuum Pump: 560
mm of Hg.
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13. Observations
Tests 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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14. COST FACTOR
 1 Kg of Activated Alumina = Rs 20-23
 It can be reused several times
 1 bottle of water = Rs 15 - 20
 Since 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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15. Future prospects
 Energy Efficient
 Application of Nanotechology
 Process Type
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16. Why this method ?
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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

17. Conclusions
 The 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.
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18. ACKNOWLEDGEMENTS
WE WOULD LIKE TO THANK
DR. S.J. PUROHIT FOR HER MORAL
SUPPORT AND HELP.
A SPECIAL THANKS TO
DR. PARAG SUTAR AND
MRS. ANJALI KIRKIRE
FOR GUIDANCE AND LAB
ASSISTANCE
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19. 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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20. THANK
YOU
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