原位红外光谱研究Ru/Al2O3催化剂上一氧化碳吸附态  

STUDY ON Ru/Al2O3 CATALYST FOR ADSORPTION OF CO WITH IN SITU DRIFTS

作　　者：张齐[1] 鲁树亮[1] 彭晖[1] Zhang Qi;Lu Shuliang;Peng Hui(Beijing Research Institute of Chemical Industry,SINOPEC,Beijing 100013,China)

机构地区：[1]中国石油化工股份有限公司北京化工研究院

出　　处：《精细石油化工》2019年第6期14-18,共5页Speciality Petrochemicals

摘　　要：运用原位红外光谱研究了Ru/Al2O3催化剂在不同条件下,CO以及CO与氢气在催化剂表面共吸附行为的转化,并考察了吸附态氢与CO对催化剂活性中心竞争吸附的关系。结果表明,CO在Ru/Al2O3催化剂表面形成了孪生吸附以及线式吸附,而且由于Ru的特殊电子结构较容易失去电子形成缺电子中心,同时Ru与Al2O3载体相互作用较强。因此相比其他过渡态金属更容易在大频率范围产生孪生吸附。在加氢过程中,高频的孪生吸附态参与反应生成了甲烷,并且低频的孪生吸附态有可能会与吸附态氢产生新的吸附形态,该吸附态也有可能是CO在加氢过程中在催化剂表面活性中心解离吸附产生的中间吸附态。In situ infrared spectroscopy was used to study the CO adsorption behavior of Ru/Al2O3 catalyst under different conditions,and the competitive adsorption relationship between the adsorption state of hydrogen and CO on the active site of the catalyst.The results showed that CO forms twin adsorption and linear adsorption on the surface of Ru/Al2O3 catalyst,and due to the special electronic structure of Ru,it was easy to lose electrons and form electron deficient center.At the same time,because of the strong interaction between Ru and Al2O3,it was easier to produce twin adsorption in a large frequency range than other transition metals.In the process of hydrogenation,the high-frequency twin adsorption state was involved in the reaction to generate methane,and the low-frequency twin adsorption state might generate a new adsorption form with the adsorbed hydrogen,and the adsorption state might also be the intermediate adsorption state produced by the dissociation of CO from the active center on the catalyst surface during the hydrogenation process.

关 键 词：一氧化碳 加氢 钌/三氧化二铝 孪生吸附 

分 类 号：O643.36[理学—物理化学]