标题: | 以氢氧化钠辅助乙炔分解制备碳材料 Fabrication of Carbon Materials by Sodium Hydroxide Assisted Acetylene Pyrolysis |
作者: | 简宇婕 Chien Yeu-Jye 裘性天 Chiu Hsin-Tien 应用化学系硕博士班 |
关键字: | 乙炔;氢氧化钠;碳;孔洞;Acetylene;Sodium Hydroxide;Carbon;Porous |
公开日期: | 2005 |
摘要: | 本研究是利用氢氧化钠与乙炔反应,比较在不同实验条件下,改变四种实验参数,利用自生成水气气泡作为模板,得到孔洞性碳材料,分别是:A系列反应是调控不同反应温度,反应温度从523 K ~ 873 K ;B系列是控制乙炔流速,流速由1.45 sccm ~ 8.3 sccm;C、D系列是改变不同反应时间,与乙炔反应1小时至反应9小时;E、F系列则改变反应物氢氧化钠重量,由0.05 g ~ 0.5 g。 本实验所得到的产物,可经由水洗纯化后得到孔洞性碳材料。反应过程中产生的气体可由动态摄影观察水气出现的情形,并利用GC可得知其成分为水。由纯化后的产物与氢氧化钠之莫耳比分别与四个实验参数做图可知本反应为一催化反应,利用反应中产生之金属钠当催化剂与乙炔反应,此反应断乙炔碳氢键的能量为64 kJmol-1,使其能在较低反应温度下形成多孔性碳材,并藉由SEM、EDS、TEM、SAED、XRD、BET和Raman进行特性鉴定与分析。 This thesis presents the results of porous carbon materials that were prepared by sodium hydroxide and acetylene at the atmospheric pressure. The carbon materials come into being porous structure because of producing stream from sodium hydroxide and acetylene reaction. This experiment was changed four parameters that were divided into A to F parts as follows:Part A, different reaction temperature (573 K~ 723 K). Part B, various acetylene flow rate (1.45 sccm ~ 8.3 sccm). Part C and D, several reaction time (1 h ~ 9 h). Part E and F, diversified reactant weight (0.05 g ~ 0.5 g). The products were washed with distilled water during purification and became to porous carbon materials. Producing steam from this reaction was recorded with in-situ observation and was defined as water by GC analysis. It was proved that the reaction is a catalytic reaction by illustrations of C/NaOH molar ratio with reaction temperature. Then, energy of activation of the surface-reaction-controlled kinetics (523 K ~ 723 K) is calculated to be 64 kJ mol-1. During the catalytic reaction process, sodium was produced as a catalyst that reacted with acetylene and formed porous carbon materials at lower temperature. Moreover, SEM、EDS、TEM、SAED、XRD、BET and Raman spectra have been used to characterize the product. |
URI: | http://140.113.39.130/cdrfb3/record/nctu/#GT009325525 http://hdl.handle.net/11536/79242 |
显示于类别: | Thesis |
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