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merrylutao新蟲 (正式寫手)
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[求助]
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| 催化氣化選用K2CO3催化劑，從而提高碳水反應(yīng)和甲烷化反應(yīng)速率。催化劑的加載方式有水溶液浸漬，干混等。通過水溶液浸漬，催化劑分布比較均勻，并可進(jìn)入煤的空隙中。使K與煤中的-COOH，-OH官能團(tuán)結(jié)合形成C-O-K活性中間體，起到催化作用。另一方面，催化氣化適宜在低溫高壓下操作，最適宜的爐型是流化床，由于K2CO3的密度及粒徑與所選用的煤差別很大，通過干混的方式加載催化劑，在流化床氣化的過程中容易出現(xiàn)分層的現(xiàn)象，使催化劑不能與煤很好地進(jìn)行結(jié)合。 |
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ssssllllnnnn 
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- 翻譯EPI: 1690
- 應(yīng)助: 452 (碩士)
- 金幣: 31580.9
- 紅花: 100
- 帖子: 7681
- 在線: 19966.6小時(shí)
- 蟲號(hào): 3328089
- 注冊(cè): 2014-07-17
- 專業(yè): 腫瘤發(fā)生
【答案】應(yīng)助回帖
★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ...
merrylutao: 金幣+100, 翻譯EPI+1, ★有幫助, XX 2015-01-08 14:32:41
merrylutao: 金幣+100, 翻譯EPI+1, ★有幫助, XX 2015-01-08 14:32:41
| K2CO3 catalysts were selected for catalytic gasification to increase carbon-water reaction and methanation reaction rates. Catalyst loading methods included dipping solution and dry mix. By dipping solution, the catalyst was more evenly distributed and was able to access to coal gap, which made it possible for K to interact with such functional groups as -COOH and -OH and form reactive intermediates C-O-K, functioning as a catalyst. On the other hand, catalytic gasification was best operated at low temperature and high pressure. Therefore, fluidized bed was the most suitable furnace. However, since there was a big difference in the density and particle size between K2CO3 and the selected coal, stratification phenomenon was prone to occur when dry mix method was used for catalyst loading in the flow fluidized bed in the gasification process, which made it difficult for catalyst to bind coal well. |
2樓2015-01-08 12:01:48
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