| 초록 |
Propane and butane are the main components of LPG which has well-developed infrastructure for transportation. Nevertheless, studies on partial oxidation(POX) of LPG are very few. In this work, POX of propane and butane was studied in our laboratory by using ceria-promoted nickel-calcium hydroxyapatite (CexNi2.5Ca10(OH)2(PO4)6 ; x = 0.1-0.3) catalysts and then the experimental results from propane and butane feed were compared. The experiments were carried out with varying ceria content in the catalyst, O2/C3 or C4 molar feed ratio(1.5-3.0) and temperature(823-1073 K). The optimum ceria content in the catalyst(x) was 0.1 for both propane and butane feed. The optimum O2/C3H8 and O2/C4H10 ratios were 2.0 and 2.5-2.75, respectively. Under these conditions, CH4 selectivity as higher while C2+(C2, C3 and/or C4) selectivity was lower from propane when compared with those from butane. On the whole, the H2 yield was higher from propane than butane. The long-term stability tests under the optimum conditions, exhibited that higher conversion, lower CH4 and C2+ selectivity and thus higher H2 yield were obtained on the whole from butane than propane. |
