The Oak Ridge National Laboratory (ORNL) and the Westvaco Corporation are both engaged in the development of novel adsorbent carbons. This CRADA facilitated close cooperation between these partners in the characterization and performance of several novel adsorbent carbon materials. The research and development activities conducted under this CRADA fell into three major areas: (1) The determination of the methane storage capacities of ORNL's adsorbent carbon monoliths. (2) The determination of the thermal conductivity of ORNL's adsorbent carbon monoliths and Westvaco's powdered activated carbon product. (3) The use of X-ray diffraction analysis to characterize the structure of Westvaco's powdered activated carbon and investigate structural changes after heat-treatment to high temperatures. The results of activities in these three areas are reported and discussed here.