Pyrolysis of Potassium-Doped Wood at the Centimeter and Submillimeter Scales

Autor:	Mishal H. Shah, Hayat Bennadji, Elizabeth M. Fisher, Lei Deng
Rok vydání:	2015
Předmět:	Exothermic reaction Thermogravimetric analysis Centimeter Chemistry General Chemical Engineering Potassium Doping Analytical chemistry Energy Engineering and Power Technology chemistry.chemical_element Fuel Technology Distilled water Organic chemistry Potassium level Pyrolysis
Zdroj:	Energy & Fuels. 29:7350-7357
ISSN:	1520-5029 0887-0624
DOI:	10.1021/acs.energyfuels.5b01776
Popis:	The effect of potassium additives on pyrolysis of poplar was investigated at 427 °C, both at the submillimeter scale, through thermogravimetric analysis (TGA), and at the centimeter scale, through pyrolysis of wood cylinders in a turbulent reactor. Internal temperatures and time-resolved rates of production of gases and light volatiles were measured in the centimeter-scale study. The potassium level in the samples was varied through vacuum treatment with distilled water or solutions of KCl or K2CO3, resulting in potassium levels of approximately 100, 4500, and 7000 ppm (dry, mass basis). At the centimeter scale, potassium addition had a dramatic effect on conversion time and on the magnitude of exothermic temperature excursions, as well as a significant effect on the yields of gases and light volatiles. Consistent with the literature, submillimeter-scale TGA experiments with external temperature control also indicated a catalytic effect of the potassium additives, with K2CO3 more effective than KCl in pro...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::859b01d8c2b8d7f7fce8da1179971053 https://doi.org/10.1021/acs.energyfuels.5b01776 Zobrazit plný text záznamu