1. Key Laboratory of Green Process and EngineeringState Key Laboratory of Multiphase Complex SystemsInstitute of Process EngineeringChinese Academy of Sciences Beijing 100190 People's Republic of China
2. Department of Chemistry [IndustrialUniversity of Ibadan Ibadan, Oyo State Nigeria
3. Department of Forest Products Development and UtilizationForestry Research Institute of Nigeria Ibadan, Oyo State Nigeria