Fuel block for high temperature electrochemical device

Abstract

A fuel block system which includes a solid fuel. The solid fuel includes one or more of the following: a biomass or a charcoal generated from a biomass; the solid fuel is configured to release a gaseous and electrochemically-active fuel when exposed to heat.

What is claimed is: 
     
         1 . A fuel block system, comprising:
 a solid fuel which includes one or more of the following: a biomass or a charcoal generated from a biomass, wherein the solid fuel is configured to release a gaseous and electrochemically-active fuel when exposed to heat.   
     
     
         2 . The fuel block system of  claim 1 , wherein at least one of the following is naturally low in chlorine: the biomass or the charcoal generated from a biomass. 
     
     
         3 . The fuel block system of  claim 1 , wherein a chlorine removal process is performed on at least one of the following: the biomass or the charcoal generated from a biomass. 
     
     
         4 . The fuel block system of  claim 3 , wherein the chlorine removal process includes washing with a liquid to remove chlorine. 
     
     
         5 . The fuel block system of  claim 1  further comprising a wrapper. 
     
     
         6 . The fuel block system of  claim 1 , wherein at least one of the following is finely divided: the biomass or the charcoal generated from a biomass. 
     
     
         7 . The fuel block system of  claim 6 , wherein the fuel block system is formed into a self-supporting object. 
     
     
         8 . The fuel block system of  claim 7 , wherein the fuel block system is formed into one or more of the following: a pellet, a block, a pill, a sheet, or a tablet. 
     
     
         9 . The fuel block system of  claim 1  further comprising a potassium-containing compound, wherein the potassium-containing compound is 0-20 weight percent of the fuel block system. 
     
     
         10 . The fuel block system of  claim 9 , wherein the potassium-containing compound includes one or more of the following: potassium carbonate, potassium bicarbonate, potassium hydroxide, potassium nitrate, or potassium sulfate. 
     
     
         11 . The fuel block system of  claim 1  further comprising an oil. 
     
     
         12 . The fuel block system of  claim 1  further comprising an oil and a potassium-containing compound, wherein at least two of the following are mixed together: the solid fuel, the oil, or the potassium-containing compound. 
     
     
         13 . The fuel block system of  claim 1  further comprising an indicator ingredient configured to change color during one or more of the following: exposure to heat or release of the gaseous and electrochemically-active fuel. 
     
     
         14 . The fuel block system of  claim 1  further comprising a lid. 
     
     
         15 . The fuel block system of  claim 1 , wherein the charcoal generated from a biomass is generated using pyrolysis in the one or more of the following ranges of 300-600° C. or 400-500° C.