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收集所有交通大學研究人員與學生個人或團體所發表之各項學術著作，涵蓋期刊論文、教師專書、學位論文等項。;;Collections of Publications of NCTU Researchers and Students Like Journal Papers and Thesis.

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🏛️國立陽明交通大學機構典藏

Access type: Metadata onlyAuthor: search.filters.author.Bai, HL

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    Design model for selective catalytic reduction process: Solution of convective diffusion and NOx reaction
    (1998-12-01)
    Bai, HL
    ;
    Chwu, JW
    ;
    環境工程研究所
    ;
    Institute of Environmental Engineering
    A simple model for the design of selective catalytic reduction (SCR) process is presented. The two-dimensional mass transfer equation shown in Bai and Chwu (1997) is simplified and the analytic solution is obtained. The analytic solution is verified by the solution of the numerical two-dimensional model as well as published experimental data. Then it is applied for the design of the SCR reactor. Effects of operating temperature, inlet molar ratio of NH3/NO, channel pitch, and gas flow rate on the SCR reactor volume are evaluated based on a designed NO removal efficiency. The NH3 slip problem of a given inlet ratio of NH3/NO also is discussed. It is shown that the injection ratio of NH3/NO must be slightly higher than the desired NO removal efficiency so that the reactor volume can be reduced and the problem of NH, slip is not a major concern.
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    Measurement of atmospheric particles and anionic species across central Taiwan
    (2003)
    Fang, GC
    ;
    Chang, KF
    ;
    Lu, CS
    ;
    Bai, HL
    ;
    環境工程研究所
    The ambient air concentrations and fluxes of various anionic species were sampled by MOUDI, TSP and dry deposition plates at a traffic sampling site in Taichung, central Taiwan. In the sampling period, from September to December 2000, the ambient air particle concentrations (PM1, PM2.5, PM10 and TSP) were lower in the September than in the other three months (October to December). The reason is that the northwest wind brought more particles (diameter less than 10 mum) and the higher wind speed caused higher dry deposition fluxes and TSP concentrations in the last three months. The anion species percentages of TSP were 0.24%, 13.7%, 0.52%, 12.0%, 18.9% and 54.6% for F-, Cl-1 Br-1 NO2-1 NO3 and SO42-, respectively. The results revealed that SO42-, NO3, Cl- and NO2- were the dominant species at the traffic sampling site. The ion-size distributions of Cl-, NO2- and NO3 were unimodal, the main peak being between 3.2 and 5.6 mum. In contrast, the size distribution Of SO42- was bimodal, with the main peaks in the particle size ranges 0.32-0.56 mum and 3.2-5.6 mum. The ambient average particle dry deposition flux was 6.28 mug/m(2)/s, and the dry deposition fluxes were 0.01, 94.6, 0.05, 34.7, 72.2 and 376.4 ng/m(2)/s for F-, Cl-, Br, NO2-, NO3- and SO42-, respectively. The dry deposition velocities were 3.10, 0.03, 3.67, 0.05, 1.54, 2.03 and 3.67 cm/s for F-, Cl-, Br-, NO2-, NO3- and SO42-, respectively.