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Chen W.-M.,Institute of Environment and Resources | Kim H.,Seoul National University | Yamaguchi H.,Energy and Environmental Quality
Energy Policy | Year: 2014

Japan, South Korea, and Taiwan are deficient of domestic fossil energy sources and depend significantly on imported fuels. Since the oil shock in the 1970s, all three countries have promoted renewable energy as an alternative energy source to improve energy security. Currently, renewable energy is being promoted to build low-carbon economies. This study reviews the development of renewable energy policies and roadmaps. It also examines and compares strengths, weaknesses, opportunities, and threats (SWOT) of these countries in the context of advancing renewable energy policies and technologies and expanding domestic renewable energy installations, as well as strategically positioning themselves in the international renewable energy market as exporters of clean energy technologies. Through the SWOT analysis, this paper identifies a capacity for additional renewable energy deployment in these countries and highlights the necessity of increased cooperation between the three countries to strengthen their domestic and regional renewable energy sectors and compete in the global renewable energy market in the post-Fukushima era. © 2014 Elsevier Ltd. Source

Chen C.-W.,National Kaohsiung Marine University | Liao Y.-L.,Institute of Environment and Resources | Chen C.-F.,National Kaohsiung Marine University | Dong C.-D.,National Kaohsiung Marine University
Journal of Bionanoscience | Year: 2013

Nano-TiO2 particles were synthesized using the hydrothermal technique and evaluated for photocatalytic degradation phenol. Results show that the TiO2 catalyst enhanced both the detoxification and the oxidation rate. Five intermediates (e.g., aromatic compounds) and further oxidized by-products (e.g., organic acids) were identified based on HPLC and IC measurements. The concentrations of intermediates varied with reaction time. Aromatic products were at maximum concentration (13.7%) at 90 min, organic acids were maximum (21.5%) at 270 min, and the end-product, CO2 (68% or 2.04 mM) appeared at 480 min. Results from the Microtox tests (TU50) show that the TU50 value was 2.42% at the beginning of the test. However, it reached to a maximum of 18.7% at 90 min, then decreased to 0% at 180 min. This indicates that the toxicity of intermediate products was greater than that of the reactant-phenol. Results from this study could be used to establish reaction mechanisms and design a photocatalytic system for the treatment of phenol-contaminated waters. The effects of crystallite sizes, specific surface area, and crystalline phases of TiO2 on photoactivity were also studied. Like the commercial product, Degussa P25, the prepared nano-TiO 2 has similar characteristics for the degradation of phenol. Copyright © 2013 American Scientific Publishers. All rights reserved. Source

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