Elimination of arsenic-containing emissions from gasification of chromated copper arsenate wood

• Bench-scale gasification tests of CCA wood.
• Product gas cleaning system for removing arsenic using a hot filter.
• Equilibrium modeling of arsenic behavior using combined thermodynamic database.

The behavior of arsenic in chromated copper arsenate containing wood during gasification was modeled using thermodynamic equilibrium calculations. The results of the model were validated using bench-scale gasification tests. It is shown that over 99.6% of arsenic can be removed from the product gas by a hot filter when the gas is cooled below the predicted condensation temperature.