Partial oxidation of methane to syngas over nickel-based catalysts modified by alkali metal oxide and rare earth metal oxide

Partial oxidation of methane and ethane to synthesis gas over a LiLaNiO/γ-Al2O3 catalyst

“…Appropriate amounts of LiNO 3 , Ni(NO 3 ) 2 and La(NO 3 ) 3 were impregnated on ␥-Al 2 O 3 support for 24 h, dried at 393 K, and then calcined in air at 823-1073 K for 4 h. The elemental content of the catalyst is provided in Section 3. The catalyst that has been operated for 100 h was labelled as 'catalyst'-100 h, e.g.…”

“…The 100, 200 and 500 h life tests of partial oxidation of methane and ethane to synthesis gas were performed using a microreactor with an internal diameter of 8 mm and 500 mg catalyst. The analysis methods of the reaction products were the same as published before [2].…”

“…Sufficiently good performance for the POM reaction was reported for oxide systems such as NiO-CaO [7], NiO-MgO [8], CoO-MgO [9], NiO-rare earth oxides [10], Ni/Al 2 O 3 [11], NiO/␥-Al 2 O 3 [2]. Mean-while, it was found that NiO/␥-Al 2 O 3 was also a good catalyst for the partial oxidation of ethane (POE) to synthesis gas [12].…”

“…Owing to these reasons, we adopted alkali and rare earth metal oxides to modify the NiO/␥-Al 2 O 3 catalyst. The results indicated that modification with alkali and rare earth metal oxides could not only stabilize the support ␥-Al 2 O 3 phase, but also suppress the sintering and loss of nickel, and in addition, enhance the ability of suppressing carbon deposition over the NiO/␥-Al 2 O 3 during a high temperature reaction [2,13,14]. In the present paper, reaction performance of a LiLaNiO/␥-Al 2 O 3 catalyst for CH 4 -C 2 H 6 -O 2 reaction to synthesis gas and 500 h life test of the LiLaNiO/␥-Al 2 O 3 for natural gas-O 2 to synthesis gas were investigated.…”

“…Commonly, the amount of C 2 H 6 is relatively lower than that of CH 4 . With regard to the utilization of methane, partial oxidation of methane (POM) to synthesis gas over nickel-based catalysts has received intensive attention [1,2]. For mixture gases containing CH 4 and C 2 H 6 , their conversion to synthesis gas is also of significance (but has not gained adequate attention), because complete separation of ethane from methane may not be economical [3].…”