DSpace
 

EPrints@IIT Delhi >
Faculty Research Publicatons  >
Chemical Engineering >

Please use this identifier to cite or link to this item: http://eprint.iitd.ac.in/handle/2074/2368

Title: Energy and chemicals from rice husk
Authors: Jain, Ankur
Rao, T Rajeswara
Sambi, S S
Grover, P D
Keywords: rice husk
pyrolysis
amorphous silica
activated carbon
potassium silicate
Issue Date: 1995
Citation: Biomass and Bioenergy, 7(1-6), 285-289p.
Abstract: Rice husk is the only agro residue having maximum siliceous ash content and available in dry form. The present work on rice husk describes processes for producing controlled carbon-silica mixtures in amorphous form, electronic-grade potassium silicate and activated carbon. Rice husk is first pyrolised in a reactor at less than 973 K to obtain the char which is subsequently heated and activated with steam at 1073–1173 K for about 1 h in another reactor. The char is leached with HCl. Analysis of the leached char indicates that it is amorphous in nature and contains mainly 40% carbon and 56% silica with small quantities of volatile matter. The utility of the material as filler for reinforcement of rubbers is tested. Test results show that a tenfold increase in tensile strength and modulus of elasticity can be achieved with 100 phr. In another development, the leached char is digested with 10–15% KOH solution in the temperature range of 303–373 K for about 1–10 h. It is found that electronic-grade potassium silicate could be easily produced compared to the conventional method of fusion of sand with alkali at 1273–1473 K. The residue from this process is a good-quality activated carbon. A process flowsheet is presented for producing these chemicals with energy recovery aspects from rice husk.
URI: http://eprint.iitd.ac.in/dspace/handle/2074/2368
Appears in Collections:Chemical Engineering

Files in This Item:

File Description SizeFormat
jainene94.pdf134.51 kBAdobe PDFView/Open
View Statistics

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

 

Valid XHTML 1.0! DSpace Software Copyright © 2002-2010  Duraspace - Feedback