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[求助]
一段英语译成汉语,急需啊,在线等。
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| Bubble column reactors(BCRs) have been widely used for conducting gas-liquid reactions in numerous industrial applications.However,utilization of BCR for biodiesel production has only been reported by Yamazaki et al.[1]and Joelianingsih et al.[2,3].Those reports showed that the BCR can be used for catalysr-free biodiesel production at atmospheric pressure.The reaction wad carried out in semi-batch mode,where bubbles of superheated methanol(MeOH) vapor were continuously blown into the oil-containing teactor.The advantage of this method is that it requires no catalyst ,and thereby transesterification of oils with high free fatty acid content can be accomplished without prior treatments.Joelianingsih et al.[2]studied the effect of reaction temperatures(250,270 and 290℃)on the rate constant,conversion of reaction , yield of biodiesel andmethyl esters(MEs)content in the biodiesel product on the kinetics of the non-catalytic transesterification of palm oil at atmospheric pressure.For larger capacity commercial production, a continuous transesterification processes are preferrde over batch processes due to the requirement of consistent product quality and low capital and operation costs per unit of product. |
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sltmac: 金币+1 2012-06-02 11:18:42
sltmac: 金币+25, 翻译EPI+1 2012-06-21 08:55:00
sltmac: 金币+1 2012-06-02 11:18:42
sltmac: 金币+25, 翻译EPI+1 2012-06-21 08:55:00
| 在许多工业应用中,鼓泡塔反应器(BCRs)被广泛用来进行气液相反应。然而,利用BCR生产生物柴油仅见于山崎等[1]和Joelianingsih等[2,3]报道。这些报道表明,在正常大气压力、无催化剂条件下,可以利用BCR生产生物柴油。反应采用半批处理模式,过热甲醇蒸汽形成的泡沫不断被风吹到含油反应器中。这种方法的优点是它不需要催化剂,也不需要预处理,就可以完成高游离脂肪酸含量的油酯交换反应。Joelianingsih等[2]研究了反应温度(250、270和290℃)对反应速率常数、反应的转化率、生物柴油产量的影响,以及生物柴油产品中甲基酯(MES)的含量对正常大气压力下棕榈油酯交换反应非催化动力学的影响。基于稳定的产品质量、较低的资本和单位产品经营成本的要求,对于大规模的商业化生产来说,持续酯交换工艺优于批处理工艺。 |
2楼2012-06-01 17:24:49
3楼2012-07-13 23:01:29













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