INNOVATIVE WAY TO DEVELOP A FIRE EXTINGUSIHER

Guide - Dr. Anita Kumari (IIT-Delhi)Authors- Tanvay Shinde

Saurabh Deshpande

Afreen Shaikh

College- Thadomal Shahani Engineering

College – Mumbai

B.E – Chemical Engineering

Introduction

Fire and hazards

Introduction to fire extinguisher

Types of fire and fire extinguisher used

Types of Fire extinguisher

PORTABLE TYPE

WATER TYPE FIRE EXTINGUISHER

FOAM FIRE EXTINGUISHER

DRY POWDER FIRE EXTINGUISHER

DRY CHEMICAL EXTINGUISHER

CARTRIDGE OPERATED DRY CHEMICAL

Two main type of fire extinguisher

1)Stored pressure 2)Cartridge operated

Source- safety108.blogspot.com

Innovation in fire extinguisher

Fire Extinguisher improvements

Materials improvement

Chemicals Change

Design change

What we did?

Basic working of Fire Ball

1)Fire Ball

2)FIRE

3)After fire scene

Fire ball extinguisher model

Implications of this method

Human safety

Easy to use

No Technical Knowledge required

Less space required.

Reaction Involved

Sulphuric acid and sodium bicarbonate reaction

2NaHCO3 + H2SO4 -> Na2SO4+ 2CO2 +H2o

Aluminium Sulphate and sodium bicarbonate

Al2(SO4)3 +6 NaHCO3 = 3 Na2SO4 +2Al(OH)3 + 6 CO2

Acetic acid and Sodium carbonate

CH3COOH + Na2CO3 ----> 2 CH3COONa + H2O + CO2

Calculations

For the Reaction of Sulphuric acid

and Sodium bicarbonate

2NaHCO3+H2SO4 = Na2SO4 +

2H2O

+ 2CO2

Weight of NaHCO3 taken 168gms

Volume of H2SO4 taken 53.26 cm3

Calculation-

*No of moles = weight/molecular

weight

Weight =moles× molecular

weight

=2×84

Weight =168 gms of NaHco3

* Volume of sulphuric acid

for the other two reactions.

No of moles = weight/molecular

weight

Mass = moles×molecular

weight

= 1×98

Mass =98gms

Density = 1.84 gm/cm3

Volume = mass/density

= 98/1.84

= 53.26 cm3

Total amount of reactants=

98+168= 266 gms

CalculationsEnthalpy Calculation

∆H(NaHCO3)= -947.68 Kj/mol

∆H(H2SO4)= 1295.23 Kj/mol

∆H(CO2)= -393.51 Kj/mol

∆H(H2O)= -241.82 Kj/mol

∆H(Na2SO4)= -1387.1 Kj/mol

∆H®=∆H(reactants)-∆H(products)

=(2(-393.51)+2(-241.82)+(-

1387.1))-(2(947.68)+1295.23)

= -2057.63 Kj/mol

∆H= -2057.63 Kj/mol

Entropy Calculation

∆S(NaHCO3)= 102

∆S(H2SO4)= 2392

∆S(CO2)= 219

∆S(H2O)= 69.95

∆S(Na2SO4)= 149.6

∆S®=∆S(reactans)-∆S(products)

=(2(219)+2(69.95)+149.64)-

(2(102)+157)

=366.54 j/mol k

∆S=366.54 j/mol k

In the similar manner calculations

were conducted for other two

reactions was conducted.

Comparison of the reactions

Reactant Products Amount of heat released

Entropy Amount of

CO2

Acetic

acid,Sodiumbicarbonate

Carbon

dioxide,Water,Sodium Acetate

1282.96 Kj/Mol -2509.9 J/MolK 264

gms

Sulphuric

acid,Sodium bicarbonate

Carbon

dioxide,Water,Sodium sulphate

-2057.63 Kj/Mol 366.54 J/MolK 88

gms

Aluminium

Sulphate,Sod

ium bicarbonate

Aluminium

hydroxide,Carbon dioxide,Sodium sulphate

67.72 Kj/Mol -1139.4 J/MolK 264

gms

Specifications

Amount of co2 produced- 264 gm

Materials –

poly vinyl chloride

poly vinyl ether

Reaction time – 3-4 secs

FUTURE PROSPECTS

Manufacturing of Fire extinguisher

material

Design of the Fire Extinguisher

Improve Impact distance

CONCLUSION

Our proposed method is an innovative

way to use an fire extinguisher.

The Enthalpy Calculation was conducted

to find out suitable pressure which will be

determine the material of construction.

In this method we are constantly studying

and finding better way to reduce the cost

of this method so that it can be

economically feasible.

Acknowledgment

This project was supported by Thadomal

Shahani Engineering College,Chemical

Department,Mumbai.

We would like to show grattitude to our

guide Dr. Anita Kumari mam,HOD Dr.

S.J.Purohit mam.

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http://www.extinguisheradvice.org.uk/types-of-fire-extinguisher.php