CO2部分氧化乙烷制乙烯Pd—Cu／MoO3—SiO2催化剂的研究

用化学吸附－红外光谱、化学吸附－程序升温脱附（ＴＰＤ）和微型反应技术研究了Ｐｄ－Ｃｕ／ＭｏＯ３－ＳｉＯ２（ＭｏＳＯ）催化剂对ＣＯ２和乙烷的吸附活化和部分氧化反应性能．结果表明，乙烷以Ｃ—Ｈ键中的Ｈ吸附于ＭｏＳＯ载体表面ＭｏＯ键的端基氧上；Ｐｄ－Ｃｕ／ＭｏＳＯ催化剂对ＣＯ２有良好的化学吸附活化性能，ＣＯ２的吸附除有线式吸附态和剪式吸附态外，还有一种新的卧式吸附态；Ｐｄ－Ｃｕ／ＭｏＳＯ催化剂的晶格氧参与了化学反应．探讨了在Ｐｄ－Ｃｕ／ＭｏＳＯ催化剂上ＣＯ２的部分氧化乙烷反应机理

Study of PdCu/MoO3SiO2 Catalyst for Partial Oxidation of Ethane to Ethene by CO2

Chemisorption combined with IR spectrometry and TPD and microreactor techniques have been used to investigate the adsorption activation and partial oxidation reactivity of CO2 and C2H6 on title catalyst. It is found that C2H6 is chemisorbed on the surface of the catalyst through H of its CH bond and terminal O of Mo=O bond. For the adsorption of CO2 on the catalyst mm,WK20mm,WK35mm,WK13mm,WK45mmW]besides the linear type and the scissors type there appears another horizo ntal type . The lattice oxygen of the catalyst is found to play an important role in partial oxidation. A mechanism of partial oxidation is proposed.