旋转滑动弧等离子重整生物质燃料制氢

发布时间：2018-03-07 04:21

本文选题：等离子　切入点：旋转滑动弧　出处：《浙江大学》2015年硕士论文　论文类型：学位论文

【摘要】：氢能具有热值高、无污染、适用范围广的特点,生物质燃料因其可再生、对环境友好日益引起人们的关注。利用生物质制取氢气是一种能够解决能源和环境问题的有效途径之一。常规燃料的水蒸气重整制氢反应需在高温下进行,消耗了大量的热量,同时燃料依赖于化石燃料也制约了该技术的可持续发展。滑动弧等离子处理技术作为新型的燃料重整技术,越来越受到国内外研究学者的关注。本文采用了两种旋转滑动弧对以甘油和菜籽油为代表的生物质燃料重整反应进行了研究,验证了等离子重整燃料制氢的可行性： (一)在拉法尔喷管滑动弧等离子反应器重整甘油制氢的实验中,反应产生的气相产物主要成分为H2、CO、CH4、CO2,其中H2和CO占比达到了70%;当其他工况不变,仅增大水/甘油比时,甘油气相转化率和气相产物流量降低,氢气收率略有增大；当其他工况不变,仅增载气流量时,甘油气相转化率和气相产物流量先升高后降低,功率增大；当其他工况不变,仅增电压时,甘油气相转化率和气相产物流量增大,功率增大。在本实验中,得到的最适宜条件为水／甘油比为1:1,氮气流量为10L/min,电压10KV,此时甘油气相转化率为47.58%、氢气选择性为37.6%、一氧化碳选择性为36.4%。 (二)在磁驱动滑动弧等离子反应器重整菜籽油的实验中,反应产生的气相产物主要成分为H2、CO2、CO、CH4、C2H2、C2H4和C2H6,且产物中合成气所占比重超过50%,H2(41-53%)、CO(12-13%),除CO2可燃气体组分在95-98%。当其他工况不变,仅增大菜籽油流量时,菜籽油气相转化率,气相产物流量先升高后降低；当其他工况不变,仅增载气流量时,甘油气相转化率和气相产物流量先升高后降低,功率减小；当其他工况不变,仅增电压时,甘油气相转化率和气相产物流量增大,功率增大。综合考虑各评价指标,当菜籽油3mL/min,氮气流量为10L/min,电压10kV时具有较好的制氢效果,此时菜籽油气相转化率为25.62%、氢气选择性为43.4%、气相产物流量为1.04L/min.
[Abstract]:Hydrogen energy has the characteristics of high calorific value, no pollution and wide application range. Making hydrogen from biomass is one of the effective ways to solve the energy and environmental problems. The steam reforming of conventional fuel for hydrogen production takes place at high temperature and consumes a lot of heat. At the same time, the dependence of fuel on fossil fuels also restricts the sustainable development of the technology. As a new type of fuel reforming technology, sliding arc plasma treatment has attracted more and more attention of domestic and foreign researchers. In this paper, two rotating sliding arcs were used to study the reforming reaction of biomass fuel represented by glycerol and rapeseed oil, and the feasibility of hydrogen production from plasma reforming fuel was verified. (1) in the experiment of reforming glycerol for hydrogen production in Rafal nozzle sliding arc plasma reactor, the main component of the gas phase product produced by the reaction is H _ 2H _ 2CO _ (4) CO _ (2), in which the H _ 2 and CO ratios reach 70%, and when the water / glycerol ratio is increased only when other conditions are not changed, The gas conversion of glycerol and the flow rate of gas product decreased, and the hydrogen yield increased slightly. When the flow rate of gas was increased only, the conversion rate of glycerol and the flow rate of gas product increased first and then decreased, and the power increased when the other conditions were unchanged. When the voltage is increased only, the conversion rate of glycerol gas phase and the flow rate of gas product increase, and the power increases. The optimum conditions are as follows: water / glycerol ratio is 1: 1, nitrogen flow rate is 10 L / min, voltage is 10 KV, gas conversion of glycerol is 47.58, selectivity of hydrogen is 37.6 and selectivity of carbon monoxide is 36.4. (2) in the experiment of reforming rapeseed oil by magnetically driven sliding arc plasma reactor, the main components of the gaseous product produced by the reaction are H _ 2CO _ 2C _ 2C _ 2C _ 2H _ 4 and C _ 2H _ 6, and the proportion of syngas in the product is more than 50 H2H _ 2N _ 41-53 CO _ (12-1313), except that the combustible gas component of CO2 is 95-98. When the flow rate of rapeseed oil was increased, the gas phase conversion rate of rapeseed oil and the flow rate of gaseous product first increased and then decreased, while the gas conversion rate and gas product flow rate of glycerol increased first and then decreased, while the flow rate of gas product increased first and then decreased. When the other conditions are constant and the voltage is only increased, the gas phase conversion rate and gas product flow rate of glycerol increase, and the power is increased. Considering the evaluation indexes, when the rapeseed oil is 3 mL / min, the nitrogen flow rate is 10 L / min, and the voltage is 10 kV, the effect of hydrogen production is better. The gas phase conversion of rapeseed oil is 25.62%, the selectivity of hydrogen is 43.4%, and the flow rate of gaseous product is 1.04L / min.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TQ116.2;TK6

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