Thermal cracking of Canola oil: Reaction products in the presence and absence of steam
Thermal cracking of Canola oil: Reaction products in the presence and absence of steam
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DOI：
10.1021/ef960029h
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发表时间：
1996-11-01
期刊：
影响因子：
5.3
通讯作者：
Bakhshi, NN
中科院分区：
文献类型：
--
作者：
Idem, RO;Katikaneni, SPR;Bakhshi, NN
在常压固定床反应器中，研究了油菜籽油菜热裂解产物在300-500℃温度范围内，气体每小时空速(GHSV)在3.3-640h(-1)范围内，惰性物料以及有无水蒸气的情况下的产物分布。结果表明，菜籽油的转化率很高(54-100wt%)，并且对操作变量有很强的依赖性。产品主要由C-4和C-5碳氢化合物、芳烃和C-6(+)脂肪烃、C-2-C-4烯烃以及柴油类燃料馏分和氢气组成。GC-MS分析表明，碳氢化合物和含氧碳氢化合物的产物分布和碳链长度不仅强烈依赖于裂化温度和空速，而且还取决于裂化是否在有水蒸气的情况下进行。另一方面，在惰性物质上的裂解表明，转化率和产物分布完全与裂解表面的形态无关。提出了菜籽油热裂解产物分布的反应方案。观察到的菜籽油转化率和产物分布随操作变量的变化与反应方案一致。
The product distribution obtained from the thermal cracking of canola ail was studied at atmospheric pressure in a fixed-bed reactor in the temperature range 300-500 degrees C and gas hourly space velocity (GHSV) in the range 3.3-640 h(-1) over inert materials and in the presence and absence of steam. Results showed that canola oil conversions were high (54-100 wt %) and depended strongly on the operating variables. Products essentially consisted of C-4 and C-5 hydrocarbons, aromatic and C-6(+) aliphatic hydrocarbons, and C-2-C-4 olefins, as well as a diesel-like fuel fraction and hydrogen. GC-MS analyses showed that product distribution as well as the lengths of the carbon chain of hydrocarbons and oxygenated hydrocarbons depended strongly not only on the cracking temperature and space velocity but also on whether cracking was conducted in the presence or absence of steam. On the other hand, cracking over inert materials showed that both conversion and product distribution were completely independent of morphology of the cracking surface. A reaction scheme has been proposed to account for the product distribution obtained from the thermal cracking of canola oil. The observed changes in both canola oil conversion and product distribution with changes in the operating variables were found to be consistent with the reaction scheme.