Kui-Hao Chuang
National Chung Hsing University
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Publication
Featured researches published by Kui-Hao Chuang.
Environmental Science & Technology | 2015
Minhua Su; Changzhong Liao; Kui-Hao Chuang; Ming-Yen Wey; Kaimin Shih
This study investigated the stabilization efficiencies of using an aluminum-rich precursor to incorporate simulated cadmium-bearing waste sludge and evaluated the leaching performance of the product phase. Cadmium oxide and γ-alumina mixtures with various Cd/Al molar ratios were fired at 800-1000 °C for 3 h. Cadmium could be crystallochemically incorporated by γ-alumina into CdAl4O7 monoclinic phase and the reaction was strongly controlled by the treatment temperature. The crystal structure details of CdAl4O7 were solved and refined with the Rietveld refinement method. According to the structural refinement results, the stabilization efficiencies were quantified and expressed as a transformation ratio (TR) with optimized processing parameters. The preferred treatment temperature was found to be 950 °C for mixtures with a Cd/Al molar ratio of 1/4, as its TR value indicated the cadmium incorporation was nearly completed after a 3 h treatment scheme. Constant-pH leaching tests (CPLT) were conducted by comparing the leachability of the CdO and CdAl4O7 phases in a pH 4.0 environment. A remarkable reduction in cadmium leachability could be achieved via monoclinic CdAl4O7 structure formation to effectively stabilize hazardous cadmium in the waste stream. The CPLT and X-ray photoelectron spectroscopy (XPS) results suggested incongruent dissolution behavior during the leaching of the CdAl4O7 phase.
international conference on chemistry and chemical engineering | 2010
Kui-Hao Chuang; Ming-Yen Wey; Zhen-Shu Liu; Chi-Yuan Lu
In this study, the catalytic activities of Raw CNTs and Co/CNTs for CO removal were determined between 100 and 300°C. To confirm the characterization of Raw CNTs and Co/CNTs, the composition and morphology of two catalysts were analyzed by using XRD, SEM, TEM and Raman spectra. The results showed that the CO conversion was 98% by using Raw CNTs at 250°C and this conversion was similar to that of using Co/CNTs. Since no purification and no re-immersion steps are needed for the preparation of Raw CNTs, this application can save the preparation procedures and reduce the waste yields and costs.
International Journal of Hydrogen Energy | 2012
Bing-Shun Huang; Hsin-Yi Chen; Kui-Hao Chuang; Ren-Xuan Yang; Ming-Yen Wey
Applied Catalysis A-general | 2011
Kui-Hao Chuang; Chi-Yuan Lu; Ming-Yen Wey; Ya-Ni Huang
Applied Catalysis B-environmental | 2009
Chi-Yuan Lu; Ming-Yen Wey; Kui-Hao Chuang
Fuel | 2009
Chi-Yuan Lu; Hui-Hsin Tseng; Ming-Yen Wey; Ling-Yi Liu; Jia-Hong Kuo; Kui-Hao Chuang
Energy & Fuels | 2015
Ren-Xuan Yang; Kui-Hao Chuang; Ming-Yen Wey
Materials Science and Engineering B-advanced Functional Solid-state Materials | 2009
Chi-Yuan Lu; Hui-Hsin Tseng; Ming-Yen Wey; Ling-Yi Liu; Kui-Hao Chuang
Materials Science and Engineering B-advanced Functional Solid-state Materials | 2010
Kui-Hao Chuang; Zhen-Shu Liu; Ming-Yen Wey
International Journal of Hydrogen Energy | 2013
Kui-Hao Chuang; Kaimin Shih; Chi-Yuan Lu; Ming-Yen Wey