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FROM THE RICE HUSK TO MATERIALS PROCESSING
Gerardo Contreras Puente, Jorge Aguilar Hernández, Hilda Margarita Alfaro, Enrique Hoyos García, Sergio Fernández
Escuela Superior de Física y Matemáticas del IPNEdificio de Física Avanzada, UPALM, C.P. 07738, México D.F.
Photovoltaic
sIndustry
Silicon
More efficient
processes and
reduction of costs
To Create Environment Friendly Technology
To reduce production costs
Search of new materials
Use of waste materials
Sustainable development
To Solve Needs
Environment
Our generation
Future generations
Why Rice?
Rice as Universal Food
Rice is the most important dish for more than a half of the world’s population.
United Nations Organization declared 2004 as the International Year of Rice.
National and International Rice Production
In the year 2009, 678 million tons of rice were produced in the world (FAO).
Mexico produced 224 thousand tons of rice just in 2008 (SAGARPA).
World’s Rice Consumption Per Person
100 g 20 g
Rice Husk
170 millon tons of rice husk in the world (FAO)
56 thousand tons of rice husk produced in Mexico
(SAGARPA)
World Rice Production
Use of rice husk
Biomass
To feed animals
Organic fertilizer
Furniture manufacture
SiO₂
100 g 22 g
Rice husk SiO2 Silicon Solar
Cell
Process to Obtain Silicon Oxide
It consists of four stages:
Calcination
Fusion
Evaporation
Filtration
EDS
Rice husk
Calcination
Calcinated rice husk
Fusion
The obtained ashes are mixed with sodium carbonate and sodium peroxide.
Fusion
Evaporation
The fusion that results is cooled and mixed with chloridric acid in order to start the evaporation.
Filtration and Heat Treatment
The obtained products is filtred and washed with HCl and distilled water.
Finally it receives heat treatment.
Final Product SiO₂
Final Product SiO₂
Cristobalite
Tridymite
.
790,str., s
473, ben
621,ben
1100, str. as
233
420.5
THANK YOU
Dr. Gerardo Contreras [email protected]
Escuela Superior de Física y Matemáticas del IPNEdificio de Física Avanzada, UPALM, C.P. 07738, México D.F.
