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 IPN Edificio de Física Avanzada, UPALM, C.P , México D.F.
To Create Environment Friendly Technology 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? Why Rice?
Rice as Universal Food 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 20 g Rice Husk 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 Use of rice husk Biomass To feed animals To feed animals Organic fertilizer Furniture manufacture Furniture manufacture
SiO ₂ 100 g 22 g 22 g
Rice husk SiO2Silicon Solar Cell
Process to Obtain Silicon Oxide It consists of four stages: CalcinationFusionEvaporationFiltration
EDS Rice husk
Calcination 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 SiO ₂
Final Product SiO ₂ Final Product SiO ₂
Cristobalite
Tridymite
. 790,str., s 473, ben 621,ben 1100, str. as
THANK YOU Dr. Gerardo Contreras Puente Escuela Superior de Física y Matemáticas del IPN Edificio de Física Avanzada, UPALM, C.P , México D.F.