[Digestion] condensation in gas lines

[Zietsman, Rex]

Stan has a point about condensation. The same can also be said about
using a wet scrubber and to a lesser extent to condensing out tars. Good
practise would be to have a low point water trap that you drain every
day if you stop the gasifier. If it runs continuously, you put two
valves in with a short piece of pipe in between. To drain, with the
bottom valve closed, open the top valve to allow condensate to fill the
pipe. Close the top valve and open the bottom valve and drain. Repeat.
Rex

Gentlemen,
Regarding the water based CO2 scrubbing, wouldn't this give you methane
that was saturated with water vapor?  I'm not sure what this would do
inan engine.  Maybe cause icing in your carburetor?
The beauty of absorption cooling is that it is driven primarily by low
quality (thermal) energy rather than expensive shaft power or
electricity. Hence you could make electricity with your methane and then
use the waste engine jacket and exhaust pipe heat to create cooling. 
Have your cake and eat it too.
Stan L Simon, P.E.