[Wayne Bridgeman]

Also in regards to the mild gasifier in my previous post. I suspect not but want to be sure.

Thanks.

[eugenedakin]

Hi Wayne,

As a general rule, no. Since there may be a 'purist' out there, there could be the slight possibility (0.000000000001 % chance) that one may recombine spontaneously. When I troubleshoot this in the field, I typically assume that hydrocracked hydrocarbons do not recombine spontaneously. 

There is an exception to this rule ... if there is insufficient hydrogen (usually hydrogen is used), then the cracked hydrocarbons can definitely recombine.

Sincerely,

Eugene

[BillBullock]

There are two variations of this. One is termed "condensation reactions" and the other is termed "retrogressive condensation reactions." The difference, according to my understanding, is that the latter forms recombined molecular structures of ever-increasing length and complexity. Both are valuable tools in the research into the gasification and liquifiaction of coal and the upgrading of heavy/extra-heavy crudes. One indication that this has taken place is a very dark or black coloration of the produced fluids. This is usually caused by colloidal carbon with a positive charge. It usually cannot be separated by centrifuging or settleing and is too fine to be filtered. Fractional distillation will usually separate the liquid phase from the solids. In some cases I have seen these products continue to react for some extended time in the sample container after collection. Chemo-electric separation sometimes works. Hope this helps.

Bill