摘要
利用ＴＰＲ、Ｈ２脉冲吸附和ＴＰＤ方法，对轻油预转化催化剂ＣＮ－１４和Ｇ１－８０进行了还原性考察和表面性能研究。ＴＰＲ实验结果表明，两种催化剂的微分还原曲线均存在３个大小不同的还原峰，它们分别对应于３种不同状态的、ＮｉＯ，其ＮｉＯ的相对含量有较大差异，改变制备方法或预处理条件，可使不同状态ＮｉＯ含量得到改变。吸附－ＴＰＤ实验表明，Ｇ１－８０催化剂经运转后，Ｎｉ表面积减少约３４％；而ＣＮ－１４催化剂经运转后其Ｎｉ表面积不仅未减少，反而增大了１１％左右，其催化活性和稳定性最好。实验还表明，在４５０℃下，催化剂上起催化作用的部位主要是低温活性中心。
The reducibility and surface characteristic of catalysts CN-14 and Gl-80 for pre reform ing light oil have been investigated by means of TPR. H2 pulse adsorption and TPD methods. The experimental results of TPR show that there are three different sized reduction peaks on the differential reduction curves of the two types of catalysts, corresponding to three kinds of NiO with different states. The contents of different state of NiO can be changed by altering the preparation method and pre treatment condition. The experiment of adsorption-TPR indicates that. the Ni stlrface area of Gl-80 catalyst decreases by some 34% after operation, while that of CN-14 catalyst increases by about 11%. When it is correlated with catalyst activity. its activity stability is excellent. The experiment also shows that the low temperature active sites of the catalyst plays a key role in the catalytic process.
出处
《天然气化工—C1化学与化工》
CAS
CSCD
北大核心
1994年第4期5-9,共5页
Natural Gas Chemical Industry
关键词
轻油
预转化
富甲烷气
催化剂
pre-reforming of light oil
enriched methane gas
reduction of catalyst
