Effect of Addition of K to Ni/SiO2 and Ni/Al2O3 Catalysts on Hydrothermal Cracking of Bitumen注意:本論文已在《Sekiyu Gakkaishi (J. Japan Petrol.
Inst.) 》43 (5), pp.357. 發表 Jie CHANG, Noritatsu TSUBAKI*, and Kaoru FUJIMOTO Abstract:Hydrothermal cracking of Canadian Athabasca bitumen was performed over Ni/SiO2 and Ni/Al2O3 catalysts under 703 K and 5.0 MPa of hydrogen pressure in a batch reactor. Comparing with thermal cracking under the same reaction conditions, hydrothermal cracking process obviously suppressed the formation of coke from 5.5wt% to 3.5wt% (Ni/SiO2) and to 3.0wt% (Ni/Al2O3), and the formation of gaseous hydrocarbon products. To decrease coke formation further, a small amount of potassium was impregnated in the catalysts. The spectroscopy of NH3-TPD showed that the amount of acidic sites in both catalysts, Ni/Al2O3 and Ni/SiO2, was dramatically decreased by K2O modification. The acid-catalyzed polymerization of residuum induced by acidic sites in the catalyst, that might result in the formation of coke, was suppressed by neutralization of the acidic sites. Adding 3% of potassium onto Ni/SiO2 decreased the yield of coke from 3.5wt% to 2.1wt%. 1、瀏覽PDF格式全文需要使用軟件--Abode Acrobat(由于軟件較大并常見,我站不提供下載) 2、下載論文全文請點擊(54KB)
本站收錄的本文作者的其他論文: 2、Initiation Effect of Local Heating in Hydro-Thermal Cracking of Resids 3、The Promotional Effect of Initiators in Hydro-thermal Cracking of Resids 4、Study on Hydrothermal Cracking of Heavy Oils: Formation of Radical Under Lower Reaction Temperature
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