文献类型：期刊文献

中文题名：甲烷在氧化钼系催化剂上的选择氧化

英文题名：Studies on MoO_3-SiO-2 Catalysts for Direct Partial Oxidation of Methane

作者：金杏妹[1];汪仁[1];戚蕴石[1];姚成[1];程宏[1];徐福书[1]

机构：[1]华东化工学院工业催化研究所

年份：1993

卷号：19

期号：3

起止页码：376

中文期刊名：华东化工学院学报

收录：国家哲学社会科学学术期刊数据库;Scopus;CSCD:【CSCD2011_2012】；

语种：中文

中文关键词：甲烷;甲醛;氧化氟;选择氧化;氧化钼

外文关键词：methane;formaldehyde;nitrous oxide;iron;cobalt;selective oxidation;molybdenum oxide

摘要：以MoO_3-SiO_2为主催化剂,研究了助剂Fe、Co的催化作用。Fe的加入,提高了催化剂对甲烷的脱氢能力,从而提高生成HCHO的选择性;Co的掺入与Mo形成CoMoO_4相,改善了MoO_3在含水气氛中的稳定性。考察了空气作氧化剂取代N_2O进行CH_4选择氧化的可能性。反应过程中水的加入抑制了深度氧化反应的进行,使生成HCHO选择性提高。
The effects of promoters iron and cobalt, the possibility of substitution of air for N_O as oxidizing agent and the influence of water on the reaction were investsgated. The TPD results showed that the addition of iron enhances the dehydrogenation ability and increased the selectivity of HCHO. The LRS results showed that the introduction of cobalt results in the formation of "CoMoO_4" phase and increases the stability of MoO_3 in the presence of water. The comparative studies, using N_2O and air as oxidizing agent, indicated that over Mo-Fe-Co-O/SiO_2 catalyst at 500℃, CH_4:N_2O:N_2:H_2O= 1:3:1:4(mol), the yield of HCHO is 3.4% and that at 400 ℃, CH_4: N_2:air:H_2O = 11: 8.4 : 3.3: 44, the yield of HCHO is 2.7%. However, when the catalyst is Mo-Fe-O/SiO_2, under otherwise equal conditions, the yield of HCHO is 4.6% and 2.6% respectively for N_2O and air. It was found that the addition of water increases the selectivity of HCHO.