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Study rates of reaction of co2 on nano-sized calcium oxide hydrotalcite mixture /Low Sing Ei

Study rates of reaction of co2 on nano-sized calcium oxide hydrotalcite mixture_Low Sing Ei_K4_2011_NI
Tesis ini mengkaji tahap penyerapan/ jerapan karbon dioksida pada kalsium oksida bersaiz nano dan hidrotalsit komersil dan campurannya. Percubaan dan hasil kajian disajikan untuk tahap penyerapan/ jerapan untuk campuran 100%, 66.67%, 33.33% dan 0% zarah kalsium oksida bersaiz nano dengan hydrotalsit pada suhu 30°C, 100°C dan 700°C. Kajian menunjukkan100% kalsium oksida bersaiz nano mempunyai tahap penyerapan awal tertinggi pada suhu 30°C sedangkan 0% kalsium oksida bersaiz nano mempunyai tahap awal tertinggi serapan pada 100°C. Untuk experimen pada 700°C, 33.33% kalsium oksida bersaiz nano mempunyai tahap penyerapan awal tertinggi. Pekali difusi yang selanjutnya dinilai untuk 100% kalsium oksida bersaiz nano dan 100% hydrotalsit. Difusi Knudsen dominan dalam 100% kalsium oksida bersaiz nano sedangkan difusi permukaan lebih dominan dalam proses jerapan 100% hydrotalsit. Pemalar laju reaksi dinilai untuk 100% kalsium oksida bersaiz nano dan ia meningkat dengan peningkatan suhu semasa proses penyerapan. ___________________________________________________________________________________ This paper studies on the rates of absorption/ adsorption of carbon dioxide on nanosized calcium oxide and commercial hydrotalcite and mixtures thereof. Experiment studies and results are presented for rates of absorption/ adsorption for 100%, 66.67%, 33.33% and 0% nano-sized calcium oxide particles in hydrotalcite at 30°C, 100°C and 700°C. From the results, it was found that 100% nano-sized calcium oxide had the highest initial rate of absorption at 30°C whereas 0% nano-sized calcium oxide had the highest initial rate of sorption at 100°C. For experiments conducted at 700°C, 33.33% nano-sized calcium oxide had the highest initial rate of sorption. The diffusion coefficients were thereafter evaluated for 100% nano-sized calcium oxide and 100% hydrotalcite. Knudsen diffusion is dominant in 100% nano-sized calcium oxide while surface diffusion is more dominant in adsorption process of 100% hydrotalcite. Reaction rate constants were evaluated for 100% nano-sized calcium oxide and it increases with increasing temperature during absorption process.
Contributor(s):
Low Sing Ei - Author
Primary Item Type:
Final Year Project
Language:
English
Subject Keywords:
absorption/ adsorption ; hydrotalcite ; nanosized calcium oxide
First presented to the public:
4/1/2011
Original Publication Date:
8/28/2020
Previously Published By:
Universiti Sains Malaysia
Place Of Publication:
School of Chemical Engineering
Citation:
Extents:
Number of Pages - 84
License Grantor / Date Granted:
  / ( View License )
Date Deposited
2020-09-03 11:38:42.44
Submitter:
Nor Hayati Ismail

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