生物质气化制氢中试系统设计与气化合成气脱硫实验
发布时间：2018-12-11 04:13
【摘要】：化石燃料储量有限且不可再生,同时给人类居住环境带来了严重污染,人们逐渐认识到必须加速开发利用清洁的可再生能源。生物质资源丰富,是重要的可再生能源,而氢能是一种理想的新型含能体能源,利用生物质制氢是极具吸引力的缓解能源问题的方法。清华大学提出了一种生物质气化催化变换制氢工艺,为验证其可行性,本文通过设计、加工、安装、调试和改造,形成了具备工艺生产条件的生物质气化制氢中试系统,并进行了实验。中试实验结果表明,中试系统实现了全流程物料质量平衡。裂解工序显著提高了单位产气量和最大产气速率,6%镍基负载改性橄榄石脱焦效果良好,能有效增加产气量和提高产氢率。脱硫工序中采用ZnO精脱硫剂,将生物质气化合成气中H2S浓度由约20ppm降到了0.1ppm以下。另外,本文着眼生物质气化合成气脱硫实验的部分开展研究。在小试脱硫实验台上,用H2、CO2、H2S、CO、N2等配气模拟生物质气化合成气,采用ZnO脱硫剂,在不同温度(200℃、300℃、370℃和430℃)、不同空速(1000h-1、2000h-1和3000h-1)下进行脱硫反应,经过脱硫后的出口气体用FPD(Flame Photometric Detector)测定其中H2S的含量。小试实验结果表明,ZnO脱硫剂的理想脱硫温度为370℃,可达到0.1ppm以下的脱硫精度要求。随着空速增大,ZnO脱硫剂的穿透时间减少。在温度370℃和空速2000h-1的条件下,ZnO脱硫剂可将H2S浓度从190ppm降至0.1ppm以下,穿透时间为10.5h,此条件下脱硫效果较为理想,继续降低空速可延长穿透时间。本文的研究成果可为生物质气化催化变换制氢工艺提供借鉴和参考。
[Abstract]:Because of the limited and non-renewable fossil fuel reserves and the serious pollution to the human living environment, people have come to realize that it is necessary to accelerate the development and utilization of clean renewable energy. Biomass is rich in resources and is an important renewable energy. Hydrogen energy is an ideal new energy source. Hydrogen production from biomass is an attractive way to alleviate energy problems. A biomass gasification catalytic shift hydrogen production process was proposed by Tsinghua University. In order to verify its feasibility, a pilot scale hydrogen production system based on biomass gasification was formed through design, processing, installation, commissioning and modification. Experiments were carried out. The results of the pilot test show that the whole process material quality balance is realized in the pilot system. The pyrolysis process significantly increased the unit gas production and the maximum gas production rate. The decoking effect of 6% nickel supported modified olivine was good, and the gas production and hydrogen production rate could be increased effectively. In the desulfurization process, the concentration of H _ 2S in biomass gasification syngas was reduced from about 20ppm to below 0.1ppm by using ZnO fine desulfurizer. In addition, the part of desulfurization experiment of biomass gasification syngas is studied in this paper. In this paper, the biomass gasification syngas was simulated with H _ 2CO _ 2CO _ 2H _ 2SCO _ 2 and N _ 2 on the experimental bench of small scale desulfurization. ZnO desulfurizer was used at different temperatures (200 鈩，
本文编号：2371846
[Abstract]:Because of the limited and non-renewable fossil fuel reserves and the serious pollution to the human living environment, people have come to realize that it is necessary to accelerate the development and utilization of clean renewable energy. Biomass is rich in resources and is an important renewable energy. Hydrogen energy is an ideal new energy source. Hydrogen production from biomass is an attractive way to alleviate energy problems. A biomass gasification catalytic shift hydrogen production process was proposed by Tsinghua University. In order to verify its feasibility, a pilot scale hydrogen production system based on biomass gasification was formed through design, processing, installation, commissioning and modification. Experiments were carried out. The results of the pilot test show that the whole process material quality balance is realized in the pilot system. The pyrolysis process significantly increased the unit gas production and the maximum gas production rate. The decoking effect of 6% nickel supported modified olivine was good, and the gas production and hydrogen production rate could be increased effectively. In the desulfurization process, the concentration of H _ 2S in biomass gasification syngas was reduced from about 20ppm to below 0.1ppm by using ZnO fine desulfurizer. In addition, the part of desulfurization experiment of biomass gasification syngas is studied in this paper. In this paper, the biomass gasification syngas was simulated with H _ 2CO _ 2CO _ 2H _ 2SCO _ 2 and N _ 2 on the experimental bench of small scale desulfurization. ZnO desulfurizer was used at different temperatures (200 鈩，
本文编号：2371846
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