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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