Slagging Behavior of Wood Ash under Entrained-Flow Gasification Conditions

Autor:	Paul J. de Wild, Jacob H. A. Kiel, B. Coda, Mariusz K. Cieplik
Rok vydání:	2007
Předmět:	Work (thermodynamics) Silicon Thermodynamic equilibrium General Chemical Engineering Metallurgy Energy Engineering and Power Technology chemistry.chemical_element Slag Mineralogy Wood ash Fraction (chemistry) Alkali metal Viscosity Fuel Technology chemistry visual_art visual_art.visual_art_medium
Zdroj:	Energy & Fuels. 21:3644-3652
ISSN:	1520-5029 0887-0624
DOI:	10.1021/ef700247t
Popis:	The overall objective of the work described in this paper was to determine the behavior of wood ash under entrained-flow gasification conditions. Experimental work in atmospheric and pressurized entrained-flow gasification simulators, combined with thermodynamic equilibrium calculations, has shown that wood ash is not prone to form a molten slag at typical operating conditions of (pressurized, dry-feed, oxygen-blown) entrained-flow gasifiers, in spite of the presence of a relatively high amount of low-melting alkaline elements. This appears mostly due to the formation of mainly high-temperature-melting compounds (e.g., CaO) and only a small fraction of Ca silicates, which are characterized by a lower melting temperature. Phosphor and silicon may contribute to creating a higher melt amount, whereas low-melting alkali metal compounds are mostly partitioned into the vapor phase. Experiments, as well as modeling work performed for three types of wood, have shown consistent results. Addition of a fluxing agent...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::dea3df30707bd368943b625c94811eb7 https://doi.org/10.1021/ef700247t Zobrazit plný text záznamu