乙醇水蒸气重整制氢热力学分析  

Thermodynamic analysis of hydrogen production from steam reforming of ethanol

作　　者：刘说 李思思 姜沐彤 Liu Shuo;Li Sisi;Jiang Mutong(Department of Chemical and Materials Engineering, Yingkou Institute of Technology, Yingkou 115014, China)

机构地区：[1]营口理工学院化学与材料工程系,辽宁营口115014

出　　处：《可再生能源》2018年第5期656-661,共6页Renewable Energy Resources

基　　金：营口理工学院教学团队建设项目(jt201701)

摘　　要：采用吉布斯自由能最小原理对乙醇水蒸气重整制氢的反应体系进行了热力学分析,考察了温度、压力、水醇比(H_2O/Et OH)和甲醇/乙醇比(MeOH/EtOH)对该体系平衡组成的影响。在压力为1×10~5~80×10~5 Pa,温度为700~1 300 K,水醇比为1∶1~11∶1,甲醇/乙醇比为0∶1~0.9∶1条件下,研究了H_2,CH_4以及C的平衡摩尔数。在选取的条件下,乙醇转化率达到100%。通过分析H_2,CH_4以及C的平衡摩尔数,得出最佳压力为1×105Pa,最佳温度为900 K,最佳水醇比为11∶1,最佳甲醇/乙醇比为0.9∶1。在所研究的条件范围内,通过调整反应条件可以避免积碳的生成。A thermodynamic analysis of hydrogen production from ethanol steam reforming was carried out with a Gibbs free energy minimization method. The effects of temperature, pressure,H2O/EtOH and MeOH/EtOH on the equilibrium composition of the system were considered. A detailed calculation is presented on a range of reaction conditions, i.e., pressure of 1 ×10^5-80 ×10^5 Pa,temperature of 700-1 300 K, and H2O/EtOH and MeOH/EtOH feed ratios in 1∶1-11∶1 and 0∶1-0.9∶1, respectively. And the equilibrium moles of hydrogen, methane and carbon were examined. The conversion rate of ethanol reached 100% under the selected conditions. The equilibrium moles of hydrogen, methane and carbon were analyzed. The optimum operating conditions for the hydrogen production from ethanol steam reforming were suggested as 1×10^5 Pa and 900 K, with H2O/EtOH in11 ∶1 and MeOH/EtOH in 0.9 ∶1. Carbon deposition can be avoided by adjusting the reaction conditions.

关 键 词：乙醇 水蒸气重整 氢气 热力学分析 

分 类 号：TK91[动力工程及工程热物理]