Thermogravimetric analysis on global mass loss kinetics of rice hull pyrolysis

Journal Article · Mon Sep 01 04:00:00 EDT 1997 · Industrial and Engineering Chemistry Research

DOI:https://doi.org/10.1021/ie970017z· OSTI ID:538249

Teng, H; Lin, H C; Ho, J A ^[1]

---

1. National Cheng Kung Univ., Tainan (Taiwan, Province of China). Dept. of Chemical Engineering

Pyrolyses of rice hulls were performed in a thermogravimetric analyzer from room temperature to 11732 K at heating rates of 10, 30, 60, and 100 K/min. The global mass loss during rice hull pyrolysis was modeled by a combination of the volatile evolutions of four independent parallel lumps: one for moisture and the other three for nonmoisture volatiles. The decomposition of each lump was characterized by a single reaction, first-order with respect to the amount of volatile yet to evolve. The moisture lump evolves mainly at low temperatures with an activation energy of 48 kJ/mol. The activation energies for the evolution of the nonmoisture volatile lumps, which are attributed to the decompositions of hemicellulose, cellulose, and lignin, are 154, 200, and 33 kJ/mol, respectively. Excellent agreement between the experimental data and model predictions was found.

• OSTI ID: 538249
• Journal Information: Industrial and Engineering Chemistry Research, Journal Name: Industrial and Engineering Chemistry Research Journal Issue: 9 Vol. 36; ISSN IECRED; ISSN 0888-5885
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
ACTIVATION ENERGY
AGRICULTURAL WASTES
CELLULOSE
CHEMICAL REACTION KINETICS
HEMICELLULOSE
LIGNIN
MATHEMATICAL MODELS
PYROLYSIS
RICE
THERMAL GRAVIMETRIC ANALYSIS