Published Resources Details
Conference Paper
- Title
- The agglomeration behaviour of Lochiel coal during fluidised bed gasification
- In
- Chemeca 2003: Products and Processes for the 21st Century : Proceedings of the 31st Australasian Chemical Engineering Conference
- Imprint
- , pp. 32-38
- ISBN/ISSN
- 0863968295
- Url
- https://search.informit.org/doi/10.3316/informit.067103997304933
- Description
[This paper was awarded the John A Brodie Medal 2003]
- Abstract
Fluidised bed gasification (FBG) is a promising process for utilising high-sodium and highsulphur coals, but agglomeration and defluidisation are potential problems. Experiments have been conducted to investigate these phenomena, to assist in elucidating the mechanisms at play and to develop operating solutions. It was found that agglomeration and defluidisation of Lochiel coal occur, within the 4-hour timeframe of these experiments, only when bed temperature exceeds 850 C and the air/fuel ratio is above 2.5. Agglomerates are composed mainly of silicate material, in combination with Na, Ca, Mg, Al and Fe in varying amounts. It is surmised that non-crystalline phases in agglomerates are sodium disilicate, with inclusions of Ca, Fe, Mg and Al that are expected to lower the mixture melting point, causing FBG operating problems when the total inorganic content of the bed rises above approximately 88wt% and with temperatures exceeding 850 C. It is expected that defluidisation can be avoided if operation is maintained outside of these conditions.
Related Published resources
isCitedBy
- Institution of Engineers Australia, Engineers Australia Annual Report 2003-4 (2004), 77 pp. Details