MECHANISM AND REACTION KINETICS OF PEAT DECOMPOSITION

Edi , Mulyadi and Nurul , Wiji Triana (2011) MECHANISM AND REACTION KINETICS OF PEAT DECOMPOSITION. In: Bali Internasional Seminar on science and technology 2011, 22-23 july 2011, Bali.

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    Abstract

    Peat is one of natural resources with high potential which have not been used well, either as land or peat itself as a material. This researc aims to determine steps of rate limiting reaction, with data of kinetic parameter based on unreacted core model, and empirical model for correlation of conversion, reaction time at various variables. Research on peat pyrolisis was done batch wise in fixed bed reactor. Variation of time, temperature and bead diameter was done in the first year to formulate reaction mechanism and kinetic parameters. Second year was planned to study variation of gas flow, process pressure, and effect of catalyst which then used to optimize decomposition process. Data taken was the changes in peat masses in reactor at all time which was done by direct weighing. Also it was found the time needed for complete was found that all data could be well correlated using unreacted core model. Therefore, in the process of peat decomposition it can be assured that the limiting reaction was chemical reaction, following 1 st order reaction. Similar to the effect of time, the rising of pyrolisis temperature also cause volatilized material rise in amount, thus collision frequency (k o) and activation energy (E) rising. From correlation of temperature (T) to k, it was found that collision frequency, k o =1.407.10 -4 minutes, activation energy, E = 4326.2 cal/gmol, and k = 0.14(10 -3 ) exp (-4326.2/RT) Keywords: pyrolisis, fixed bed, peat, reaction kinetic

    Item Type: Conference or Workshop Item (Paper)
    Subjects: T Technology > TP Chemical technology > TP155 Chemical engineering
    Divisions: Conference/Seminar > Bali International Seminar on science and technology
    Depositing User: Users 8 not found.
    Date Deposited: 27 Jan 2014 15:48
    Last Modified: 27 Jan 2014 15:49
    URI: http://eprints.upnjatim.ac.id/id/eprint/4900

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