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GREEN CHEMISTRY
Dr Nam T. S. Phan
Faculty of Chemical Engineering
HCMC University of Technology
Office: room 211, B2 Building
Phone: 38647256 ext. 5681
Email: ptsnam@hcmut.edu.vn
1


Chapter 5:

RENEWABLE
MATERIALS AND GREEN
CHEMISTRY
A raw material as
feedstock should
be renewable
rather than
depleting
wherever

technically and
economically
practicable
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Renewable
energy

3


Solar power is the
name given for using
the energy of the sun
to provide electricity
or to heat water.
4


Wind power harnesses
the power of the wind
to provide electricity 5


Hydropower
means using the
power of water to
make electricity or
run machinery

6


Geothermal power
Geothermal energy is the
natural heat of the earth
which can be used to heat or
cool buildings and provide
7


hot water.


Biomass is
a collective
term for all
animal and
plant
material.
Biomass
energy is
produced
by burning
or
digesting
some
forms of
these
materials8


Hydrogen fuel:
Hydrogen (H2) is being
aggressively explored as
a fuel for passenger
vehicles. It can be used
in fuel cells to power
electric motors or
burned in internal
combustion engines
(ICEs).

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Disadvantages
• Technologies still under development
• Costly
• Needs more space
• Low-intensity energy production

10


Nonrenewable energy

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• A non-renewable resource is a natural resource which
cannot be produced, grown, generated, or used on a
scale which can sustain its consumption rate, once used
there is no more remaining
• These resources often exist in a fixed amount and are
consumed much faster than nature can create them
• Fossil fuels (such as coal, petroleum and natural gas)
and nuclear power (uranium) are examples

12


Oil is most often used to make
gasoline, the liquid that powers
vehicles and other internal
combustion devices.

13


• Coal is a combination of carbon and trace amounts of
other elements such as sulfur.
• It is mined out of the ground and used to create
electricity and for burning

14


• A nuclear reaction can produce a vast amount of energy,
primarily containing heat
• Nuclear power plants typically have four main part; the
reactor core, the steam generator, the turbine, and the
condenser.

15


• Biofuel is any fuel with an
80% minimum content by
volume of materials derived
from living organisms
harvested within the 10 years
preceding its manufacture
• The carbon in biofuels Æ
extracted from atmospheric
CO2 by the growing plants Æ
burning it does not result in a
net increase of CO2

• Solid biomass
• Liquid biomass
• Gaseous biomass

Renewable

16


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Bioethanol

There are mainly two ways of producing ethanol:
synthesis of hydrocarbons and from biomass. Only the
second approach deserves the terminology
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"bioethanol".


Bioethanol production process

19


Production of bioethanol from wood

20


Production of bioethanol from sugarcane

21


Production of bioethanol from corn

22


Production of bioethanol from sugarbeet

23


Production of bioethanol from cereals

24


Biodiesel

Biodiesel Æ ester (more generally methyl ester)
usually produced from vegetable oil.

25


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