Abstract：
:Hydrothermal carbonization (HTC) is a pretreatment process to convert diverse feedstocks to homogeneous energy-dense solid fuels. Understanding of reaction kinetics is necessary for reactor design and optimization. In this study, the reaction kinetics and effects of particle size on HTC were investigated. Experiments were conducted in a novel two-chamber reactor maintaining isothermal conditions for 15s to 30 min reaction times. Loblolly pine was treated at 200, 230, and 260°C. During the first few minutes of reaction, the solid-product mass yield decreases rapidly while the calorific value increases rapidly. A simple reaction mechanism is proposed and validated, in which both hemicellulose and cellulose degrade in parallel first-order reactions. Activation energy of hemicellulose and cellulose degradation were determined to be 30 and 73 kJ/mol, respectively. For short HTC times, both reaction and diffusion effects were observed.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Reza MT,Yan W,Uddin MH,Lynam JG,Hoekman SK,Coronella CJ,Vásquez VRdoi
10.1016/j.biortech.2013.04.028subject
Has Abstractpub_date
2013-07-01 00:00:00pages
161-9eissn
0960-8524issn
1873-2976pii
S0960-8524(13)00632-9journal_volume
139pub_type
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