煤电解制氢气工艺影响因素研究
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摘要
电解煤浆制氢气综合了煤炭的清洁利用和新能源氢气的制备而被广泛研究.采用恒电流法,分别对电解煤浆制氢过程中的电解温度、煤浆质量分数以及铁离子的质量分数进行探究.用电化学工作站进行极化时间的测试,极化时间越长,煤的转化效率越高.结果表明:电解温度、煤浆质量分数以及Fe离子质量分数对煤浆电解过程的极化时间有很大影响.在实验测试范围内,最佳电解温度为80℃;煤浆的最佳质量分数为5%,Fe~(3+)与Fe~(2+)协同作为溶液催化剂具有良好的催化性能,其最佳质量分数为4%.
Hydrogen production from electrolytic coal slurry has been extensively studied,which integrates clean utilization of coal and preparation of new energy hydrogen. In this work, the effect factors,such as electrolysis temperature,coal slurry concentration and iron ions concentration on coal electrolysis to produce hydrogen were studied under the galvanostatic conditions. Electrochemical measurements were carried out through electrochemical workstation. The longer the polarization time, the higher the coal conversion efficiency will be. The results showed that the parameters of electrolysis temperature,coal slurry concentration and iron ions concentration had great effects on the polarization time in the electrolysis. Under the experiment conditions, the best conditions for coal electrolysis to produce hydrogen were coal slurry concentration with 5 % and 4 % iron ions addition at 80℃.
Hydrogen production from electrolytic coal slurry has been extensively studied,which integrates clean utilization of coal and preparation of new energy hydrogen. In this work, the effect factors,such as electrolysis temperature,coal slurry concentration and iron ions concentration on coal electrolysis to produce hydrogen were studied under the galvanostatic conditions. Electrochemical measurements were carried out through electrochemical workstation. The longer the polarization time, the higher the coal conversion efficiency will be. The results showed that the parameters of electrolysis temperature,coal slurry concentration and iron ions concentration had great effects on the polarization time in the electrolysis. Under the experiment conditions, the best conditions for coal electrolysis to produce hydrogen were coal slurry concentration with 5 % and 4 % iron ions addition at 80℃.
引文
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[7]印仁和,赵永刚,吕世银,等.热分解法制备电解煤浆用阳极及其电催化活性[J].应用化学,2010,27(2):215-219.
[8]YU P,BOTTE G G.Bimetallic Platinum-Iron Electrocatalyst Supported on Carbon Fibers for Coal Electrolysis[J].Journal of Power Sources,2015,274:165-169.
[9]贾杰,隋升,朱新坚,等.煤浆电解制氢的动力学研究[J].燃料化学学报,2013,41(2):139-143.
[10]DHOOGE P M,PARK S M.Electrochemistry of Coal Slurries:ⅡStudies on Various Experimental Parameters Affecting Oxidation of Coal Slurries[J].Journal of the Electrochemical Society,1983,130(5):1029-1036.
[11]DHOOGE P M,STILWELL D E,PARK S M.Electrochemical Studies of Coal Slurry Oxidation Mechanisms[J].Journal of the Electrochemical Society,1982,129(8):1719-1724.
[12]DHOOGE P M,PARK S M.Electrochemistry of Coal Slurries:Ⅲ.FTIR Studies of Electrolysis of Coal[J].Journal of the Electrochemical Society,1983,130(7):1539-1542.
[2]印仁和,张磊,姬学彬,等.电解煤浆制取氢气的工艺研究[J].现代化工,2007,27(6):27-32.
[3]JIN X,BOTTE G G.Understanding the Kinetics of Coal Electrolysis at Intermediate Temperatures[J].Journal of Power Sources,2010,195(15):4935-4942.
[4]PATIL P,ABREU Y D,BOTTE G G.Electrooxidation of Coal Slurries on Different Electrode Materials[J].Journal of Power Sources,2006,158(1):368-377.
[5]SATHE N,BOTTE G G.Assessment of Coal and Graphite Electrolysis on Carbon Fiber Electrodes[J].Journal of Power Sources,2006,161(1):513-523.
[6]成旦红,洪亮铭,吕士银,等.电解煤浆制氢钛基阳极铂铁合金催化剂的制备及电催化活性研究[J].化学学报,2008,66(5):511-514.
[7]印仁和,赵永刚,吕世银,等.热分解法制备电解煤浆用阳极及其电催化活性[J].应用化学,2010,27(2):215-219.
[8]YU P,BOTTE G G.Bimetallic Platinum-Iron Electrocatalyst Supported on Carbon Fibers for Coal Electrolysis[J].Journal of Power Sources,2015,274:165-169.
[9]贾杰,隋升,朱新坚,等.煤浆电解制氢的动力学研究[J].燃料化学学报,2013,41(2):139-143.
[10]DHOOGE P M,PARK S M.Electrochemistry of Coal Slurries:ⅡStudies on Various Experimental Parameters Affecting Oxidation of Coal Slurries[J].Journal of the Electrochemical Society,1983,130(5):1029-1036.
[11]DHOOGE P M,STILWELL D E,PARK S M.Electrochemical Studies of Coal Slurry Oxidation Mechanisms[J].Journal of the Electrochemical Society,1982,129(8):1719-1724.
[12]DHOOGE P M,PARK S M.Electrochemistry of Coal Slurries:Ⅲ.FTIR Studies of Electrolysis of Coal[J].Journal of the Electrochemical Society,1983,130(7):1539-1542.