Potassium-Salt-Catalyzed Tar Reduction during Pyrolysis Oil Gasification
Potassium-Salt-Catalyzed Tar Reduction during Pyrolysis Oil Gasification
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DOI：
10.1021/acs.iecr.6b01095
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发表时间：
2016-06
影响因子：
4.2
通讯作者：
Rolf S. Postma;S. Kersten;G. van Rossum
中科院分区：
文献类型：
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作者：
Rolf S. Postma;S. Kersten;G. van Rossum
研究了溶解有氢氧化钾的松木热解油的气化，使用负载钾盐的炭作为催化剂，以筛选这是否会导致产物流中焦油产率较低。实验在 700 °C 下进行，之后将产物流彻底冷凝并对气流进行分析。结果表明，在气时空速 (GC1HSV) 为 237 h–1 时，固定的负载钾的炭床焦油显着减少。如果减少 GC1HSV，焦油的减少量就会增加。当进料中还含有 5 wt% KOH 时，观察到减少了 10 倍。基于钾离子催化焦油裂解成焦油或气体的原理，提出这种形成的焦油易于完全气化，从而形成可行的、连续的低焦油热解石油气化工艺。结果表明，在更恶劣的条件下，有望实现深度焦油去除，从而导致随后的焦油去除步骤小得多。这个过程会...
The gasification of pinewood pyrolysis oil with potassium hydroxide dissolved was investigated, using a potassium salt loaded char as catalyst, to screen if this would result in a lower tar yield in the product stream. Experiments were performed at 700 °C, after which the product stream was thoroughly condensed and the gas stream was analyzed. The results show a significant tar reduction for a fixed potassium-loaded char bed at a gas hourly space velocity (GC1HSV) of 237 h–1. If the GC1HSV is reduced, the reduction in tar increases. A reduction of a factor of 10 was observed when the feed was also loaded with 5 wt % KOH. Based on the principle that the potassium ion catalyzes the cracking of tars into char or gas, it is proposed that this formed char is easily and fully gasifiable, leading to a feasible, continuous low-tar pyrolysis oil gasification process. The results show promise of deep tar removal under more severe conditions, resulting in a much smaller tar removal step afterward. This process would...