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

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dc.contributor.authorJain, Ankur-
dc.contributor.authorRao, T Rajeswara-
dc.contributor.authorSambi, S S-
dc.contributor.authorGrover, P D-
dc.identifier.citationBiomass and Bioenergy, 7(1-6), 285-289p.en
dc.description.abstractRice 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
dc.format.extent137734 bytes-
dc.subjectrice husken
dc.subjectamorphous silicaen
dc.subjectactivated carbonen
dc.subjectpotassium silicateen
dc.titleEnergy and chemicals from rice husken
Appears in Collections:Chemical Engineering

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