TECHNOLOGY FOCUS - MECHANICAL ENGINEERING - Preferred Components: The water generating assembly further comprises control system for controlling the amount and introduction of fuel and/or oxygen to the catalyst. The catalyst is disposed on an element, which may include a substrate. The catalyst is disposed within chamber, in chamber, and on aspect of a chamber. It may be disposed within anode or cathode chamber of the fuel cell. It may be disposed on an exterior aspect of the tubular substrate, and the tubular substrate is coupled with the source of fuel in such a manner that fuel is introduced into an interior aspect of the tubular substrate whereby some of the fuel passes from the interior aspect of the tubular substrate to the catalyst on the exterior aspect and the fuel reacts with oxygen, producing carbon dioxide, water and heat. It may be applied to at least a first portion of the tubular substrate and at least one second portion of the exterior aspect is exposed and is catalyst free such that water produced on the exterior aspect passes back into the interior aspect of the tubular substrate. The substrate is a tubular substrate including fluted walls. The exterior aspect of the tubular substrate is enclosed with a liquid-impermeable, gas-permeable material forming an enclosure defining a space between the exterior aspect and the enclosure as a water generation and collection area. The enclosure provides either a pressure or a concentration gradient across the tubular substrate, and where carbon dioxide produced by oxidation of the fuel is released from the enclosure through the liquid-impermeable, gas-permeable material enclosing the tubular substrate. The tubular substrate has the catalyst disposed on an interior aspect of the tubular substrate that is coupled with the source of fuel in such a manner that fuel and oxygen are introduced to the interior aspect of the tubular substrate whereby carbon dioxide, water and heat are produced on the interior aspect of the tubular substrate. The tubular substrate may be comprised of a gas-permeable, liquid-impermeable material such that water, heat and carbon dioxide are generated at the interior aspect of the tubular substrate and carbon dioxide generated passes out through walls of the tubular substrate. The oxygen is introduced to the catalyst through the tubular substrate. At least one portion of the tubular substrate is left uncatalyzed so that excess air and carbon dioxide may pass through to an exterior aspect of the tubular substrate resulting in liquid water being collected, substantially gas free on an interior aspect of the gas-permeable, liquid-impermeable material.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The carbonaceous fuel includes methanol.