求化学专业翻译

来源：百度知道 编辑：UC知道 时间：2024/05/09 09:19:10
丙酸是一种重要的化工原料，由于国内技术的欠缺，本文旨在研究低要求、高活性的乙醇羰基合成丙酸催化剂。活性炭载体经过水洗和酸洗后，结果发现，水洗后的活性炭具有更高的比表面积和较好的微孔结构，有利于催化剂活性组分在其表面的吸附。实验中，采用经典的浸渍法来制备两种活性炭为载体的羰化催化剂C1和C2。在催化剂活性评价过程中，通过改变乙醇空速和反应温度两个主要影响因素来考察乙醇的转化率、丙酸的选择性及丙酸乙酯的选择性。实验结果表明，乙醇空速较大和反应温度较高时，由于乙醇与CO的接触时间减少和反应中的甲烷化程度加重，导致催化剂的活性降低；最佳乙醇空速和反应温度分别为0.3mlC2H5OH/g.Cat.h和260℃，此时对催化剂C1来说，乙醇转化率高达92.78%，丙酸选择性可达63.55%；对催化剂C2来说，乙醇转化率高达94.01%，而丙酸选择性只有38.82%，这说明了活性炭2要成为理想的羰化催化剂的载体时仍需进一步的探讨与研究。

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Propionic acid is an important chemical raw materials, due to the lack of domestic technology, the paper is to study low, High activity of ethanol Oxo acid catalyst. Activated Carbon Carrier washed and acid-washing, the results showed, After washing the activated carbon is more surface area and better than the microporous structure, to the activity of catalyst components in surface adsorption. Experiments using classical impregnation method to prepare two carrier activated carbon for the carbonylation catalyst C1 and C2. Catalyst activity in the evaluation process, By changing the ethanol space velocity and temperature two main factors to inspect ethanol conversion, and the selective acid ethyl selective. Experimental results show that ethanol larger space velocity and the reaction temperature is higher, Because ethanol and CO exposure and response time to reduce the extent of methanation increase, resulting catalyst activity; Best ethanol space velocity and temperature of 260 ° C a