| 余长春,路勇.Ni／Al2O3催化剂上CH4／CO2重整的脉冲反应研究[J].分子催化,1997,(4):261-267 |
| Ni／Al2O3催化剂上CH4／CO2重整的脉冲反应研究 |
| CH 4/CO 2 Reforming Reaction over a Ni/Al 2O 3 Catalyst Using a Pulsed Flow Microreactor |
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| DOI： |
| 中文关键词: 重整反应 积炭 镍 催化剂 氧化铝 催化 |
| 英文关键词:Refoming, CH 4, CO 2, Carbon deposition, Nickel catalyst, |
| 基金项目: |
| 余长春 路勇 |
| 中国科学院兰州化学物理研究所羰基合成与选择氧化国家重点实验室 |
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| 中文摘要: |
| 报道了用脉冲反应研究Ｎｉ／Ａｌ２Ｏ３催化剂上ＣＨ４／ＣＯ２重整反应的结果。脉冲反应显示，在还原的Ｎｉ／Ａｌ２Ｏ３催化剂上，ＣＨ４在６７３Ｋ就开始发生分解，并有Ｃ２Ｈ６、Ｃ２Ｈ４生成，１０２３Ｋ下，ＣＨ４几乎完全分解，单纯的ＣＯ２则很难在还原的催化剂上发生反应，在９７３Ｋ以上的高温下才会有少量Ｃ胜成ＣＯ．ＣＨＣＯ２的脉冲反应表明，当ＣＨ４在较低温度下开始分解时，ＣＯ２也会发生分解，并生成ＣＯ。脉冲反 |
| 英文摘要: |
| The dry reforming of methane over a Ni/Al 2O 3 catalyst was studied using pulsed flow microreactor. Temperature programmed desorption of CO 2 and n C 4H 9 NH 2 showed that the catalyst surface is strongly acidic. Temperature programmed pulse reaction (TPPR) over the reduced catalyst indicated that CH 4 started to decompose at a lower temperature of 673 K with the formation of ethane and ethylene, and completely decomposed at 1023 K. However, pure CO 2 is difficult to decompose on the reduced catalyst, only small amount of CO was detected when CO 2 pulse reactions was carried out at 973 K. CH 4/CO 2 TPPR revealed that CO 2 easily reacted with the fragments of CH X(x=0-3) decomposed from CH 4 at temperatures higher than 673 K, and gave out CO and hydrogen. The mechanism of CH 4/CO reforming reaction is suggested in which CH 4 decomposes at high temperatures to form surface CH X(X=0-3), then CO 2 reacts with the CH X species to synthsis gas. |
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