1. Energy-saving System Team, Research Center for New Fuels and Vehicle Technology, National Institute of Advanced Industrial Science and Technology, 16-1 Onogawa, Tsukuba 305-8569, Japan
2. Membrane Separation Processes Group, Research Institute for Innovation in Sustainable Chemistry, National Institute of Advanced Industrial Science and Technology, Central 5, 1-1-1 Higashi, Tsukuba 305-8565, Japan
3. Adsorption Functional Materials Development Group, Research and Development Department, Mizusawa Industrial Chemicals Ltd., 1-1 Mizusawa, Tainai 959-2638, Japan
4. Mitsui Mining & Smelting Co., Ltd., 1013-1 Ageoshimo, Ageo 362-0025, Japan