There is also something written about electric gas filtration in the Swiss book. One filter is introduced. Power consumption 120 to 140 Watt. Cleaning interval 8 to 50 hours, meaning dismantle it and brush the electrodes. Used 15.000 Volt direct current, so problems with too moist gas could lead to electric short circuit. They said that this filter designed by Lurgi company seems promising, but two other companies stopped their developments because of too many problems.
Long story short: Doable and filters well, if it works. But more delicate. Better suited for stationary applications than for mobile use.
A bit comparable to a diesel conversion with ignition by a small amount of injected diesel. It works, but in the end installing a spark plug is easier.
Well, all depends if you want to use your gasifier more as an object to study or for every-days work.
If you are dependent on it, I totally second @SteveUnruh. Keep it simple but sturdy, able to withstand some abusive use etc.
This is why steam locomotives in the end of the steam age where in principle the same design as Robert Stephenson built his Rocket in 1829. Many different designs were tried. Different boilers with much higher pressures, steam turbines, steam-diesel hybrids or steam-electric versions.
All were superior in theory, but much more complicated, thus required more maintenance or were unreliable. The simple but robust direct drive piston steam engine and the Stephenson boiler survived them all, because it succeeded in the rough every-days life of railroading under all weather conditions.