Studies of the Flash Carbonization Process. 1. Propagation of the Flaming Pyrolysis Reaction and Performance of a Catalytic Afterburner
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- 作者：Teppei Nunoura ; Samuel R. Wade ; Jared P. Bourke ; and Michael Jerry Antal ; Jr.
- 刊名：Industrial & Engineering Chemistry Research
- 出版年：2006
- 出版时间：January 18, 2006
- 年：2006
- 卷：45
- 期：2
- 页码：585 - 599
- 全文大小：363K
- 年卷期：v.45,no.2(January 18, 2006)
- ISSN：1520-5045
文摘
The flash carbonization process quickly and efficiently produces biocarbon (i.e., charcoal) from biomass.This process involves the ignition of a flash fire at elevated pressure in a packed bed of biomass. The firemoves upward through the bed, against the downward flow of air, triggering the transformation of biomassinto gas at elevated pressure and charcoal with fixed-carbon yields that can reach the thermochemicalequilibrium "limit" within 20 min of reaction time. Research described in this paper had two foci. The firstconcerned the propagation of the flaming pyrolysis reaction. The spatial distribution of the products' propertiesconfirmed that the carbonization reaction propagated upward from the bottom of the bed to its top, and revealedthat the charcoal products were further carbonized and combusted from the top downward after the entirebed was converted to charcoal. In addition, we found that higher pressures increased the upward speed of theflame through the bed. The second focus concerned the use of an afterburner that operated at elevated pressures,and used a commercially available catalytic monolith to reduce emissions. When the afterburner was suppliedwith sufficient secondary air, virtually all carbon monoxide emissions were eliminated.