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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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丙烷脱氢负载型ptsnna/suz-4催化剂中na+助剂组分的作用
, PP. 857-861
Keywords: 丙烷脱氢,ptsn催化剂,suz-4分子筛载体,钠离子助剂,催化稳定性
Abstract:
？用微型催化反应装置结合x射线衍射(xrd)、h2化学吸附、nh3吸附-程序升温脱附(nh3-tpd)和h2-程序升温还原等多种物理化学手段研究了丙烷脱氢负载型ptsnna/suz-4催化剂中na+助剂组分的作用。结果表明,na+组分可中和suz-4载体表面的强酸中心、提高催化剂的pt金属分散度、抑制脱氢产物的裂解和积炭的生成,从而提高催化剂的丙烷脱氢选择性和反应稳定性。但是过量na+组分的存在会削弱sn物种与载体之间的相互作用,使其易被还原,导致催化剂丙烷脱氢活性显著下降。
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