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Development of catalytic microporous media using platinum-based catalyst for mesoscale power generation system

Development of catalytic microporous media using platinum-based catalyst for mesoscale power generation system / Muhammad Yusri Ahmad
Meso pembakar mempunyai kepaduan tenaga yang tinggi tetapi rendah kestabilannya menyebabkan pemangkin digunakan untuk penambahbaikan. Dalam kajian ini, pemangkin Pt/Al2O3 telah dibangunkan untuk sistem penjanaan kuasa berskala meso. Busa Al2O3 sebagai sokongan telah menjalani proses rawatan modifikasi ke atas permukaannya dengan menggunakan kaedah pembasuhan salutan bersama larutan γ-Al2O3 sebelum pemangkin disediakan menggunakan kaedah penjerapan jisim basah bersama larutan akueus H2Cl6Pt pada kepekatan (0.002M; 0.005M; 0.008M; dan 0.01M) dan masa celupan (1jam; 2jam; dan 3jam). Morfologi permukaannya diperincikan dengan menggunakan mikroskop imbasan electron yang dilengkapi dengan spektroskopi penyerakan tenaga. Prestasi meso-pembakar berpemangkin terhadap kedudukan nyalaan api dan efisiensi pembakaran telah dikaji pada kondisi pembakaran sedikit (perkadaran ratio bahan api/udara sebanyak 1.4 dan nisbah udara kepada bahan api lebih tinggi daripada 1). Efisiensi pembakaran meningkat dengan meningkatnya kepekatan di mana pemangkin 0.01M Pt/Al2O3 telah menghasilkan efisiensi pembakaran yang tertinggi iaitu sebanyak 53% dan kedudukan nyalaan api berlaku dikeseluruhan busa pemangkin. Dengan menggunakan kaedah satu faktor pada satu masa, larutan 0.01M H2Cl6Pt telah dipilih untuk dimalarkan dan masa celupan diubah. Namun, kesan masa celupan terhadap efisiensi pembakaran tidak terlalu ketara dimana pemangkin 1jam. 2jam dan 3jam xiii 0.01M Pt/Al2O3 hanya menghasilkan 46%, 52% dan 57% efisiensi. Justeru, pemangkin 0.01M Pt/Al2O3 dengan masa celupan 3jam memberikan prestasi yang terbaik. _______________________________________________________________________________________________________ Meso-scale combustors have high power density but low stability, thus catalyst is applied to improve it. In this experiment, Pt/Al2O3 catalyst was developed for meso-scale power generation system. The support, Al2O3 foam was undergone surface modification via wash coating method with γ-Al2O3 before catalysts are prepared through wet impregnation of aqueous solution of H2Cl6Pt at various concentration (0.002M; 0.005M; 0.008M; and 0.01M) and dipping time (1hr; 2hr; and 3hr). Surface morphology of the catalyst was characterized by using scanning electron microscopy (SEM) equipped with an energy dispersive X-ray (EDX) spectroscopy. The performance of catalytic meso-scale combustor on the flame location and combustion efficiency are being investigated at lean combustion condition (ER of LPG/air equal to 1.4 and AFR higher than 1). The combustion efficiency increases as the increase in concentration where 0.01M Pt/Al2O3 catalyst gives the highest combustion efficiency which about 53% and flame location occurs at the whole part of the catalytic foam. By applying one-factor-at-one time method, 0.01M H2Cl6Pt solution is chosen to keep constant and vary the dipping time. However, the effect towards combustion performance is not so significant where 0.01M Pt/Al2O3 catalyst of 1hr, 2hr and 3hr dipping time only gives 46%, 52%, and 57% efficiency respectively. Thus, 0.01M Pt/Al2O3 catalyst which 3hr dipping time give the best performance among others.
Contributor(s):
Muhammad Yusri Ahmad - Author
Primary Item Type:
Final Year Project
Identifiers:
Accession Number : 875005401
Language:
English
Subject Keywords:
Meso-scale; power; Pt/Al2O3
First presented to the public:
6/1/2014
Original Publication Date:
8/18/2020
Previously Published By:
Universiti Sains Malaysia
Place Of Publication:
School of Chemical Engineering
Citation:
Extents:
Number of Pages - 81
License Grantor / Date Granted:
  / ( View License )
Date Deposited
2020-08-18 09:47:36.984
Submitter:
Mohd Jasnizam Mohd Salleh

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