Effective Diffusivity and Spalling Models for Slagging Coal Gasifiers

Journal Article · Tue Jan 08 00:00:00 EST 2008 · Journal of the American Ceramic Society, 91(12):4016-4022

DOI:https://doi.org/10.1111/j.1551-2916.2008.02755.x· OSTI ID:947919

Williford, Rick E; Johnson, Kenneth I; Sundaram, S K; Pilli, Siva Prasad

A major impact on the economics of coal gasification is the spalling degradation of hot-face refractories in slagging coal gasifiers. Two predictive models for spalling have been previously proposed and benchmarked. Both models express molten slag ingress into the porous refractory in terms of an effective diffusivity, a formulation for which is developed in the present Communication. The results appear useful for predicting the lifetimes of refractories in slagging coal gasifiers, and for determining whether the spall originated from tensile or compressive mechanisms.

• Research Organization: Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 947919
• Report Number(s): PNNL-SA-58518; JACTAW; TRN: US200905%%309
• Journal Information: Journal of the American Ceramic Society, 91(12):4016-4022, Vol. 91, Issue 12; ISSN 0002-7820
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
COAL
COAL GASIFICATION
ECONOMICS
REFRACTORIES
SLAGS