Preparation of CO2 from Engine Exhausts

[Frederick J Sparber]

A ready CO2 source for use as an ion exchange
chemical to lower the ash in biomass is the exhaust stream of an I.C.
Engine.

An air compressor that takes in the cooled exhaust gases can sparge the
compressed gases
into a cold water solution of potassium
carbonate (K2CO3)where the CO2 is absorbed:

1,          CO2 + H2O <--->  H2CO3

2, (2 K+) + CO3= + H2CO3 <---> (2K+)+ 2 HCO3-

When the pressure is decreased and the water temperature is raised,almost
pure CO2 comes
off as reactions 1, and 2, shift to the left.

The CO2 can be stored as a liquid in steel cylinders where it will have a
pressure of about 1,050 psi at 88 degrees F.

By a twist of fate, liquid Nitrous Oxide N2O at about the same temperature
has a pressure about the same as liquid CO2, due to the fact that their
molecules have the same number of atoms, the same molecular weight, and the
same number of electrons.

But, DO NOT try to use one in place of the other.   :-)

Regards,   Frederick