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Different paths
Get PDFHKDI Alumi Gary Lee and Chak Yun Hei have both been quick to carve out promising careers in design, but each has had to discover their own path to succes
Enhanced activity and stability of La-doped CeO2 monolithic catalysts for lean-oxygen methane combustion
No full textEffective utilization of coal bed methane is very significant for energy utilization and environment protection. Catalytic combustion of methane is a promising way to eliminate trace amounts of oxygen in the coal bed methane and the key to this technology is the development of high-efficiency catalysts. Herein, we report a series of Ce1-xLaxO2-δ (x = 0–0.8) monolithic catalysts for the catalytic combustion of methane, which are prepared by citric acid method. The structural characterization shows that the substitution of La enhance the oxygen vacancy concentration and reducibility of the supports and promote the migration of the surface oxygen, as a result improve the catalytic activity of CeO2. M-Ce0.8La0.2O2-δ (monolithic catalyst, Ce0.8La0.2O2-δ coated on cordierite honeycomb) exhibits outstanding activity for methane combustion, and the temperature for 10 and 90% methane conversion are 495 and 580 °C, respectively. Additionally, Ce0.8La0.2O2-δ monolithic catalyst presents excellent stability at high temperature. These Ce1-xLaxO2-δ monolithic materials with a small amount of La incorporation therefore show promises as highly efficient solid solution catalysts for lean-oxygen methane combustion
In praise of sake 清酒的進擊
Get PDFFrom the tables of Hong Kong to Europe, North America and beyond, the traditional Japanese rice wine is increasingly being accepted as an enjoyable and versatile accompaniment to food, and not simply for dishes from the beverage’s Asian homeland.
在香港、歐洲、北美以至世界各地，日本傳統米酒不僅越來越受歡迎，更被視為與各地菜式配搭的佳品，不再局限於亞洲菜式
HoSTS e-Newsletter: Issue 7
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Top-up degree scholarships help IVE graduates shine in the world
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Let\u27s be-gin 氈氈自喜
Get PDFThis juniper-flavoured liquor has experienced a meteoric rise in popularity, thanks to the craft spirits movement and an explosion of botanical experimentation. Now, with a first distillery set to open in Hong Kong, the trajectory points ever higher.
手工精釀烈酒的熱潮， 加上專家不停進行各種草本植物配方的試驗，造就了近年以杜松子調味的氈酒人氣急升。今天，香港也迎來 首間氈酒蒸餾廠，氈酒的火紅程度可謂一時無兩
Investigation on the regeneration performance of liquid desiccant by adding surfactant PVP-K30.
No full textThe liquid desiccant cooling system (LDCS) is a promising alternative for the conventional vapor compression system due to its high energy efficiency. To enhance the mass transfer between the regeneration air and liquid desiccant in the regenerator, the paper firstly introduced a kind of surfactant called polyvinyl pyrrolidone (PVP-K30) which was added into the LiCl solution for better desiccant regeneration performance. The falling film characteristics and regeneration performance were investigated and compared with and without surfactant. The results indicated that the contact angle of desiccant solution on plate decreased from 58.5° to 28.0° by adding surfactant with 0.4% of concentration. The average wetting area increased from 0.174 m2 to 0.209 m2 with a relative increment of 20.1% with the addition of surfactant. Correspondingly, the film thickness had a reduction of 0.103 mm from 0.696 mm to 0.593 mm averagely. The regeneration rate had an average enhancement of 26.3% under the same working conditions, resulting from the decrement of solution contact angle with the addition of the surfactant. Finally, correlations to predict the mass transfer coefficient were proposed with and without surfactant and the mean absolute relative deviation between the results of correlations and the experiments were kept within 8%. The results and findings of present paper could be applied to guide the design of compact regenerator for higher regeneration performance
