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Comprehensive Char Particle Gasification Model Adequate for Entrained-Flow and Fluidized-Bed Gasifiers
| Content Provider | Semantic Scholar |
|---|---|
| Author | Tilghman, Matthew B. Haugen, N. E. L. Mitchell, Reginald E. |
| Copyright Year | 2017 |
| Abstract | A robust, single-particle gasification model is presented that is capable of predicting char particle behavior in environments established in typical fluidized-bed and entrained-flow gasifiers. It employs a heterogeneous reaction mechanism that describes char reactivity to CO2, H2O, and O2 in the presence of H2 and CO, gases that inhibit char reactivity. An effectiveness factor–Thiele modulus (η–φ) approach is used to determine overall conversion rates when species concentration gradients exist inside particles, which occur at high particle temperatures when chemical reaction rates and mass transport rates through particle pores become competitive. In the approach taken, a η–φ relation is determined for each reactive gas (CO2, H2O, and O2) and deviations from first-order behavior are correlated with the concentrations of the inhibitors (CO and H2). A mean effectiveness factor is defined on the basis of the individual species effectiveness factors and used in a mode of conversion model that governs the var. |
| Starting Page | 2164 |
| Ending Page | 2174 |
| Page Count | 11 |
| File Format | PDF HTM / HTML |
| DOI | 10.1021/acs.energyfuels.6b02148 |
| Volume Number | 31 |
| Alternate Webpage(s) | https://sintef.brage.unit.no/sintef-xmlui/bitstream/handle/11250/2608133/Thilgman2017ccp.pdf?isAllowed=y&sequence=1 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
