(For USM Staff/Student Only)

EngLib USM > Ω School of Chemical Engineering >

Combustion characteristics and flame stability within catalytic micro combustion

Combustion characteristics and flame stability within catalytic micro combustion / Siti Nur Rabi’atul ’Adawiyah Azahar
Sejak beberapa tahun kebelakangan ini, dunia telah menghadapi kemajuan trend dalam kejuruteraan pengecilan dan elektrokimia peranti mekanikal, dan menyebabkan permintaan tinggi penjanaan kuasa mikro dengan peranti rendah berat badan, tahan lama yang telah meningkatkan penyelidikan dan pembangunan dalam bidang pembakaran berskala mikro. Penjana kuasa mikro menyediakan elektrik untuk peranti mudah alih elektronik. Walau bagaimanapun, pembakar mikro, yang merupakan kunci penjanaan kuasa mikro, menghadapi satu isu penting, iaitu pembakaran mikro mempunyai kestabilan yang rendah. Oleh itu, pembakaran pemangkin dicadangkan untuk menyiasat kestabilan nyalaan. Dalam eksperimen ini, pemangkin digunakan untuk meningkatkan kestabilan nyalaan. Pemangkin ini disediakan melalui kaedah pengisitepuan dengan menggunakan alumina (Al2O3) dan asid cholorplatinic (H2PtCl6). Had kemudahbakaran dengan pelbagai kadar aliran masuk udara telah diambil. Julat kadar aliran 0.2-1.2 sl / m. Pembakaran pemangkin dapat dikekalkan pada kadar aliran serendah 0.05 sl / l dan mampan diri pembakaran pemangkin adalah maksimum pada 0.18 sl / m. Bagi pembakaran tanpa pemangkin, pembakaran dapat dikekalkan dari 0.05 sl / m hingga 0.25 sl / m kadar aliran air. Suhu dinding purata diukur untuk kedua-dua kes (pemangkin dan pembakaran bukan pemangkin). Hasil suhu dinding pembakaran pemangkin adalah lebih tinggi sedikit daripada itu pembakaran bukan pemangkin. Dari segi pelepasan gas, pembakaran pemangkin menunjukkan pembakaran hampir lengkap jika dibandingkan dengan pembakaran tanpa pemangkin apabila kenaikan kadar aliran udara. Walaubagaimanapun, pembakaran pemangkin menunjukkan sisi lemah iaitu ketinggian pelepasan gas nitrogen oksida dan juga ketinggian suhu dinding. _______________________________________________________________________________________________________ Since the last few years, the world have faced an accelerated trend in the miniaturization of mechanical and electrochemical engineering devices which resulting the high demand for micro power generation with low-weight, long-life devices that has increased the researches and development of the field of micro-scale combustion. Micro power generators provide electricity for portable electronic devices. However, the micro combustor, which is the key of the micro power generation, faces one important issue, which is the micro combustion has low stability. Thus, the catalytic combustion is proposed in order to investigate the flame stability. In this experiment, catalyst is applied to improve the flame stability. The catalyst is prepared by impregnation method by using alumina (Al2O3) and cholorplatinic acid (H2PtCl6).The flammability limits under different inlet flow rate were measured. The flow rate ranges from 0.2 to 1.2 sl/m. The catalytic combustion could be sustained at flow rate as low as 0.05 sl/l and the self-sustaining of catalytic combustion was maximum at 0.18 sl/m. For non-catalytic combustion, the combustion could be sustained from 0.05 sl/m to 0.25 sl/m of air flow rate. The average wall temperature are measured for both cases (catalytic and non-catalytic combustion). The result of the wall temperature for catalytic combustion is slightly higher than that non-catalytic combustion. In term of emission of gas, catalytic combustion shows the almost complete combustion compared to non-catalytic combustion as the air flow rate increases. However, catalytic combustion shows the higher amount of nitrogen oxide. Hence, catalytic combustion shows the weak intensity, which are higher emission of nitrogen oxide and also the higher average wall temperature.
Contributor(s):
Siti Nur Rabi'atul 'Adawiyah Azahar - Author
Primary Item Type:
Final Year Project
Identifiers:
Accession Number : 875005643
Language:
English
Subject Keywords:
miniaturization; electrochemical; combustion
First presented to the public:
6/1/2015
Original Publication Date:
8/4/2020
Previously Published By:
Universiti Sains Malaysia
Place Of Publication:
School of Chemical Engineering
Citation:
Extents:
Number of Pages - 50
License Grantor / Date Granted:
  / ( View License )
Date Deposited
2020-08-04 10:19:55.817
Submitter:
Mohd Jasnizam Mohd Salleh

All Versions

Thumbnail Name Version Created Date
Combustion characteristics and flame stability within catalytic micro combustion1 2020-08-04 10:19:55.817