The premise of this research is to find whether methane (CH4) and carbon dioxide (CO2) produced during biomass gasification can be converted to carbon monoxide (CO) and hydrogen (H-2). Simultaneous steam and dry reforming was conducted by selecting three process parameters (temperature, CO2:CH4, and CH4:steam ratios). Experiments were carried out at three levels of temperature (800 degrees C, 825 degrees C and 850 degrees C), CO2:CH4 ratio (2:1, 1:1 and 1:2), and CH4:steam ratio (1:1, 1:2 and 1:3) at a residence time of 3.5 x 10(3) g(cat) min/cc using a custom mixed gas that resembles biomass synthesis gas, over a commercial catalyst. Experiments were conducted using a Box-Behnken approach to evaluate the effect of the process variables. The average CO and CO2 selectivities were 68% and 18%, respectively, while the CH4 and CO2 conversions were about 65% and 48%, respectively. The results showed optimum conditions for maximum CH4 conversion was at 800 degrees C, CO2:CH4 ratio and CH4:steam ratios of 1:1. Copyright (c) 2012, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.