Synthetic fuel pellet and methods
a technology of synthetic fuel and pellets, applied in the field of synthetic fuels, can solve the problems of reducing increasing the cost of production, so as to achieve acceptable stability and reduce the amount of binder
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Coal Fines Binder Step.
[0076]It is essential that the binder be non-water-soluble. While there are numerous such binders commercially available, one of the less expensive options appears to be that of a highly-hydrolyzed grade of polyvinyl alcohol (PVOH) such as Elvanol 90-50 (commercially available from Dupont). This material provides a high degree of cold-water insolubility, and its use as a binder is well known.
[0077]Experimentation with PVOH show that water resistant briquettes can be made with PVOH alone, with addition rates in the range of 0.1-1% (solids ratio), and preferably in the range of 0.1-0.4%.
[0078]PVOH also crosslinks with a number of materials, and experiments with crosslinkers have shown that the PVOH does indeed insolubilize, but the crosslinked material has a tendency to gel. Various crosslinkers were tested, ranging from aldehydes to metals. Invariably, as gelation occurs, the structural integrity of the briquette diminishes.
[0079]Testing has confirmed that gela...
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