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Mesoporous catalyst caoγ-Al2O3 for selective conversion of glycerol to lactic acid

Mesoporous catalyst caoγ-Al2O3 for selective conversion of glycerol to lactic acid / Zahira Mohamed Malik
Tahun kebelakangan ini, pertumbuhan industri biodiesel meningkat pesat di Malaysia dan telah menghasilkan lebihan gliserol mentah sebagai produk utama. Berdasarkan keadaan semasa, penukaran gliserol kepada bahan kimia tambah nilai yang lebih tinggi seperti asid laktik telah menarik minat ramai penyelidik untuk mengekalkan ekonomi industri biodiesel. Dalam projek ini, pemangkin yang disokong, CaO/γ-Al2O3 disintesis dengan beban CaO yang berlainan (4,7,11 dan 14%) dan penalaan pada suhu optimum 700°C. Pencirian pemangkin yang disintesis dilakukan dengan cara analisis permukaan seperti BET, SEM dan EDX. Ciri-ciri pemangkin dikaitkan dengan aktiviti katalitik berdasarkan penukaran gliserol dan hasil asid laktik. Telah didapati bahawa hasil tinggi asid laktik telah dikenal pasti dengan menggunakan pemangkin 14 CaO/γ-Al2O3 yang telah disediakan dengan menggunakan 40% kalsium asetat dan dikalsin pada 700°C dalam pengeluaran asid laktik dari gliserol. Reaksi untuk semua pemangkin dilakukan pada 10 wt. % pemangkin pemangkin, suhu tindak balas 290°C dan masa reaksi 2 jam. Untuk projek ini, pemangkin 14 CaO / γ-Al2O3 menunjukkan aktiviti pemangkin yang baik kerana ia menghasilkan hasil tertinggi asid laktik tetapi kajian masih perlu dilakukan untuk menentukan pembebanan CaO yang terhad. Secara keseluruhan, pemangkin CaO/γ-Al2O3 menunjukkan aktiviti yang baik dan ia adalah pemangkin aktif yang sesuai untuk digunakan dalam reaksi yang melibatkan gliserol. _______________________________________________________________________________________________________ In recent years, the growth of biodiesel industry increases rapidly in Malaysia and has generated a surplus of crude glycerol as the primary co-product. Based on the current condition, the conversion of glycerol to higher value-added chemicals like lactic acid has spark interest in many researchers to sustain the economics of the biodiesel industry. In this present project, supported catalyst of CaO/ γ-Al2O3 was synthesized with different CaO loadings (4,7,11 and 14 wt. %) and calcination at optimum temperature of 700 °C. The characterization of synthesized catalysts was conducted by means of BET surface analysis, SEM and EDX. The characteristics of the catalysts were correlated with the catalytic activity based on the glycerol conversion and lactic acid yield. It was found that high yield of lactic acid was identified by using 14 CaO/γ-Al2O3 catalyst which was prepared using 40 wt % of calcium acetate and calcined at 700°C in the production of lactic acid from glycerol. The reaction for all catalyst was conducted at 10 wt. % of catalyst loading, a reaction temperature of 290°C and a reaction time of 2 h. For this project, 14 CaO/ γ-Al2O3 catalyst showed good catalyst activity as it produced the highest yield of lactic acid but still further research needs to be conducted to determine the limiting CaO loading. Overall, CaO/γ-Al2O3 catalyst showed good activity and it is an active catalyst that is suitable to be used in the reaction involving glycerol.
Contributor(s):
Zahira Mohamed Malik - Author
Primary Item Type:
Final Year Project
Identifiers:
Accession Number : 875008134
Language:
English
Subject Keywords:
biodiesel; glycerol; lactic
First presented to the public:
6/1/2019
Original Publication Date:
6/28/2019
Previously Published By:
Universiti Sains Malaysia
Place Of Publication:
School of Chemical Engineering
Citation:
Extents:
Number of Pages - 64
License Grantor / Date Granted:
  / ( View License )
Date Deposited
2019-07-01 16:15:18.964
Submitter:
Mohd Jasnizam Mohd Salleh

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Mesoporous catalyst caoγ-Al2O3 for selective conversion of glycerol to lactic acid1 2019-07-01 16:15:18.964