Coupled Plasma-Catalytic System with Rang 19pr Catalyst for Conversion of Tar
Coupled Plasma-Catalytic System with Rang 19pr Catalyst for Conversion of Tar
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DOI：
10.1038/s41598-019-49959-4
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发表时间：
2019-09
影响因子：
4.6
通讯作者：
M. Młotek;Joanna Woroszył;B. Ulejczyk;K. Krawczyk
中科院分区：
文献类型：
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作者：
M. Młotek;Joanna Woroszył;B. Ulejczyk;K. Krawczyk
研究了等离子体-催化剂耦合系统（CPCS）催化甲苯转化反应，并与滑动放电等离子体均相系统进行了比较。甲苯被用作模型化合物，这是存在于焦油。该研究是在大气压下进行的，气体成分类似于生物质热解过程中获得的气体成分。研究了甲苯初始浓度、滑动放电能量和催化剂对甲苯转化率的影响。监测了出口煤气的成分和热值。实验结果表明，甲苯的转化率随滑动放电功率的增大而增大。在等离子体-催化剂耦合系统（催化剂：RANG-19 PR）中，在以下条件下获得最高的甲苯转化率（89%）：CO（0.13mol. fr.），CO2（0.12 mol. fr.），H2（0.25 mol. fr.），N2（0.50 mol. FR。）和4400 ppm甲苯，气体流速为1000 Nl/h。均相系统和CPCS中出口气体的组成在几个浓度范围内变化。甲苯含量降低了十倍。在出口流中检测到痕量的苯、C3和C4烃以及乙炔、乙烯和乙烷。反应器中存在积碳。在这两个研究体系中均检测到了碳氧化物甲烷化的产物。提出了CPCS中甲苯分解的机理。催化剂的应用提高了出口煤气的热值。它高于发动机和涡轮机所需的最低水平。
A coupled plasma-catalytic system (CPCS) for the conversion of toluene was investigated and compared to the homogeneous system of gliding discharge plasma. Toluene was used as a model compound, which is present in tars. The study was carried out at atmospheric pressure, in a gas composition similar to the one obtained during pyrolysis of biomass. The effect of the initial toluene concentration, energy supplied to gliding discharge (GD) and the presence of a catalyst on the conversion of toluene was studied. Both the composition of outlet gas and its calorific value were monitored. Based on the obtained results it can be concluded that the conversion of toluene increases with the increase of gliding discharge power. The highest toluene conversion (89%) was received in the coupled plasma-catalytic system (catalyst: RANG-19PR) under the following conditions: CO (0.13 mol. fr.), CO2(0.12 mol. fr.), H2(0.25 mol. fr.), N2(0.50 mol. fr.) and 4400 ppm of toluene with a gas flow rate of 1000 Nl/h. The composition of the outlet gas in the homogeneous system and in the CPCS changed in the range of a few percents. Toluene levels were reduced tenfold. Benzene, C3 and C4 hydrocarbons, as well as acetylene, ethylene and ethane, were detected in the outlet stream in trace amounts. Carbon deposits were present in the reactor. The products of methanation of carbon oxides were detected in the both studied systems. A mechanism of toluene decomposition in the CPCS was proposed. The application of the catalyst brought about an increase in the calorific value of the outlet gas. It was above the minimal level demanded by engines and turbines.