ok i was under the impression you were using a current IC fueled engine and using DEF so i just assumed it was diesel which i'm still wondering about because after doing some research on ammonia engines no technology has been developed yet for any engine to run solely off ammonia. The technology still requires a catalyst/pilot fuel to aid in the combustion process. Therefore it requires a duel fuel process to make it work. So what is your catalyst? H2? LPG? NG?