Green Chemistry

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12 Inherently Safer Chemistry for Accident Prevention

Substances and the form of a substance used in a chemical process should be chosen to minimise the potential for chemical accidents, including releases, explosions, and fires.

The 12 Principles of Green Chemistry (7-12)

Slide 8

“It is better to prevent waste than to treat or clean up waste after it is formed”

Chemical

Process

Slide 9

Slide 10

Slide 11

“The use of auxiliary substances (e.g. solvents, separation agents, etc.) should be made unnecessary wherever possible, and innocuous when used”

Slide 12

“Energy requirements should be recognized for their environmental impacts and should be minimized. Synthetic methods should be conducted at ambient pressure and temperature”

Slide 13

Heating

Cooling

Stirring

Distillation

Compression

Pumping

Separation

Energy Requirement

(electricity)

Burn fossil

fuel

CO2 to

atmosphere

GLOBAL WARMING

Slide 14

“A raw material of feedstock should be renewable rather than depleting wherever technically and economically practical”

Non-renewable

Renewable

Slide 15

Slide 16

Resource Depletion

Renewable resources can be made increasingly viable technologically and economically through green chemistry.

Biomass

Nanoscience

Solar

Carbondioxide

Waste utilization

Slide 17

Poly lactic acid (PLA) for plastics production

Slide 18

Polyhydroxyalkanoates (PHA’s)

Slide 19

The major uses of GREEN CHEMISTRY

Energy

Global Change

Resource Depletion

Food Supply

Toxics in the Environment

Slide 20

Energy

The vast majority of the energy generated in the world today is from non-renewable sources that damage the environment.

Carbon dioxide