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http://hdl.handle.net/2074/2368
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| DC Field | Value | Language |
|---|
| contributor.author | Jain, Ankur | - |
| contributor.author | Rao, T Rajeswara | - |
| contributor.author | Sambi, S S | - |
| contributor.author | Grover, P D | - |
| date.accessioned | 2007-01-11T08:35:49Z | - |
| date.available | 2007-01-11T08:35:49Z | - |
| date.issued | 1995 | - |
| identifier.citation | Biomass and Bioenergy, 7(1-6), 285-289p. | en |
| identifier.uri | http://eprint.iitd.ac.in/dspace/handle/2074/2368 | - |
| description.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. | en |
| format.extent | 137734 bytes | - |
| format.mimetype | application/pdf | - |
| language.iso | en | en |
| subject | rice husk | en |
| subject | pyrolysis | en |
| subject | amorphous silica | en |
| subject | activated carbon | en |
| subject | potassium silicate | en |
| title | Energy and chemicals from rice husk | en |
| type | Article | en |
| Appears in Collections: | Chemical Engineering
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| jainene94.pdf | | 134Kb | Adobe PDF | View/Open |
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