Sure, you have less particles with gas.

Markus is right.

But don't forget that when we use reformer gas in an engine it is only because we have this gas to use.

So the problem is how to use it in an engine : gas engine (it is not a diesel) dual fuel engine (that means conversion of the diesel engine )....

Any gaseous fuel forms better homogeneous mixture inside the combustion chamber than liquid fuels. Liquid fuels being sprayed into the combustion chamber forms heterogeneous mixture which suffers from varying equivalence ratio (rich near the injector nozzle and lean farther  away from it). This causes non uniform local temperature inside combustion during combustion and eventually results in varying local emission formations.

Reformed gas can be used as a fuel in spark ignition engine or as an added fuel in dual compression ignition engines. In both cases it reduces the emitted emissions and relatively improve the performance. However, as it is a gas, the storage and fueling system must be modified to suit it.

How will the fuel perfom  with exhaust gas recirculation engine..

Dear Dr Afif

Using EGR with gaseous fuel may reduce the volumetric efficiency highly which reflects on the overall engine performance.

Regards