生物质甘油重整制氢研究

发布时间：2018-02-24 12:51

  本文关键词： 甘油 重整 制氢 催化剂　出处：《华东理工大学》2015年硕士论文　论文类型：学位论文

【摘要】：本文采取水蒸气催化重整法在固定床中对甘油进行重整以制取氢气,研究了甘油在不同催化剂上的重整工艺条件,为生物柴油副产物--甘油的有效利用及重整制氢工业化应用作了有益的探索。研究了以木炭作为催化剂催化甘油重整的反应,考察了常压下反应温度、质量空速(WHSV)和水碳比(S/C)等因素对反应的影响。研究表明木炭催化甘油重整相较于木炭灰、石英砂等有较好的催化活性。在反应条件为温度800℃、WHSV为1.5h-1、 S/C为4：1的操作条件下,氢产率、潜在氢产率分别达到75.12%与84.31%,气相碳转换率达到89.08%。采用浸渍法制取Co-La-Ni/Al2O3金属催化剂对甘油进行了催化重整研究,考察了反应温度、S/C和WHSV对甘油重整反应的影响。研究表明反应温度及S/C的升高有助于氢产率、潜在氢产率及气相碳转化率的提高,Co-La-Ni/Al2O3对甘油气化重整反应具有较好的催化作用。在温度为700℃、WHSV为2.5h-1与S/C为3：1的条件下,氢产率、潜在氢产率分别达到77.64%与89.64%,气相碳转换率达到96.36%。由于催化剂容易积碳失活,采用了木炭和金属催化两段重整的制氢系统。研究表明,采用两段重整,不但提高了重整效果,而且可以延长金属催化剂使用寿命。在温度为700℃、WHSV为2.5h-1与S/C为3：1的相同条件下分别使用木炭、Co-La-Ni/Al2O3和木炭与Co-La-Ni/Al2O3共同催化甘油重整,通过GC/MS对重整的液体产物进行分析,据此推断其可能的催化反应路径。结果表明催化剂的选择改变了甘油的反应路径和液体产物的选择性。
[Abstract]:In this paper, the reforming conditions of glycerol on different catalysts were studied by reforming glycerol in a fixed bed to produce hydrogen by steam catalytic reforming. The effective utilization of glycerol, a by-product of biodiesel, and the industrial application of reforming hydrogen to hydrogen were explored. The catalytic reforming of glycerol with charcoal as catalyst was studied, and the reaction temperature at atmospheric pressure was investigated. The effects of mass space velocity (WHSVV) and water-carbon ratio (S / C) on the reaction were studied. The results show that the catalytic glycerol reforming of charcoal has better catalytic activity than that of charcoal ash and quartz sand. The reaction conditions are as follows: temperature 800 鈩，

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