摘要
在发烟硫酸溶液中,对低浓度煤层气液相部分氧化的催化剂进行了筛选,考察了硫酸盐化合物系列、过渡金属化合物系列、碘化合物系列对低浓度煤层气液相部分氧化的催化活性,对筛选出的碘催化剂进行了催化剂加入量的考察,并对碘催化剂的催化机理进行了讨论。结果表明,碘单质的催化效果最好,低浓度煤层气中甲烷转化率可达79.69%,甲烷选择性可达83.74%。在对碘催化剂加入量的考察中发现,随着碘催化剂加入量的增加,低浓度煤层气的转化率先增加,达到最大值以后,再逐渐减小。根据甲烷在发烟硫酸溶液中液相部分氧化的反应机理,提出低浓度煤层气在发烟硫酸溶液中液相部分氧化的反应机理属于亲电反应机理。
In oleum, a series of the catalyst such as sulfate compound, transition metal compound, iodine compound that could be used for catalyzing low concentration of CBM were observed. The experimental results show that catalytic effect of iodine was the best, conversion rate of low concentration of CBM could reach 79.69% and the methane selectivity reached 83.74%. Then, the effect of concentration of iodine catalyst was studied. With the concentration of iodine catalyst increased, the conversion of low concentration of CBM increased untill it reached a maximum and then dropped down. According to the liquid partial oxidation reaction mechanism of methane in oleum solution, the liquid partial oxidation reaction mechanism of low concentration of CBM in oleum solution may be the electrophilic substitution.
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
2012年第7期838-842,共5页
Journal of Fuel Chemistry and Technology
关键词
低浓度煤层气
液相部分氧化
发烟硫酸
碘
low concentration of CBM
liquid phase partial oxidation
oleum
iodine
