Sustainable
Sustainable ((Chemical Chemical) ) Solutions Solutions
Alvise
Alvise Perosa Perosa
Sustainable
Sustainable
…to
…to avoid avoid this this::
Rethinking
Rethinking Nature Nature equals
equals Rethinking
Rethinking Science… Science…
…from
…from a a chemist chemist’s ’s perspective perspective..
Nature
Science
Chemistry
Role of chemistry
Role of chemistry? ?
Impact on:
Impact on:
ENERGY
ENERGY PRODUCTS PRODUCTS
Oil
Oil--based industry based industry
Burn 90%
Burn 90% Products 10% Products 10%
Where are we now Where are we now? ?
Burn 90%
Burn 90% Products 10% Products 10%
Green Green Chemistry Chemistry Green: possibly
Green: possibly Sustainable: no!
Sustainable: no!
Green
Green Chemistry Chemistry
Alternative chemical processes
Greener solvents
Safer chemicals Molecular design
Higher efficiency
The way forward:
The way forward:
Learn from Nature Learn from Nature
Move away from fossil resources Move away from fossil resources
Grand challenge Grand challenge What Nature does
What Nature does
H2O → H2 + O2
CO2
O2
H2O
One step a
One step a a a time time
Alternative energy sources Alternative energy sources
Wind
Wind SolarSolar NuclearNuclear Renewable resourcesRenewable resources
Energy
Energy EnergyEnergy EnergyEnergy Energy + ProductsEnergy + Products
Green: yes Green: yes
Sustainable: yes
Sustainable: yes
Renewable biomass Renewable biomass
Chemical Chemical technologies technologies
Fuels
Fuels Bio Bio--based based
chemical products chemical products
CO
CO 2 2
Aim: the
Aim: the biorefinery biorefinery
Lignin:
Lignin:
renewable chemical feedstock renewable chemical feedstock
•• Useful as a source for a Useful as a source for a variety of chemicals variety of chemicals variety of chemicals variety of chemicals
•• Only source of Only source of
renewable aromatics.
renewable aromatics.
Last generation
Last generation biofuels biofuels
H O H H O
H O H H
Low Value $ O
Low Value $ O O High Value $ High Value $
H H
H O
O O H H
H O
Low Value $ High Oxygen
Low Value $ High Oxygen
High Value $
Low Oxygen
High Value $
Low Oxygen
Chemistry Chemistry: :
Green AND Beautiful Green AND Beautiful
•• It It improves improves knowledge knowledge of of the the laws laws of of Nature Nature
•• It It teaches teaches to to apply apply the the laws laws of of Nature Nature
•• … and … and it it’s ’s creative creative
•• … and … and it it’s ’s creative creative
That
That makes makes us us “ “molecular molecular designers designers” ”
Creative Creative
N
NH3 CO2CH3
H
+ O
P OH O
OH -
NH2 CO2CH3 Na2CO3
H2O a2
a1
N
NH2 CO2H
H H3PO4
(H3CO)2CO (DMC)
CH3OH SOCl2 b
CO2CH3 +
N
NH2
H N
NH3
H + HCl Cl-
a3
1
O c
O
O
H
N
NH2 CO2CH3
O O H
Cl-
2
N
N
O O H
N O
O CH3
Tadalafil
95%
d + e 88%