氢燃料电池被认为是未来最有前景的能源技术之一,通过液体甲醇现场重整制氢可有效解决氢气储存和运输等技术瓶颈。文中设计加工了板式微反应器并搭建了配套的制氢系统,制备了具有自还原特性的新型网状CuNi(Fe)/γ-Al 2 O 3/Al结构化催...氢燃料电池被认为是未来最有前景的能源技术之一,通过液体甲醇现场重整制氢可有效解决氢气储存和运输等技术瓶颈。文中设计加工了板式微反应器并搭建了配套的制氢系统,制备了具有自还原特性的新型网状CuNi(Fe)/γ-Al 2 O 3/Al结构化催化剂。以甲醇为原料,实验研究了自制催化剂在微反应器与管式固定床反应器中的催化性能,并与商用CuZn催化剂进行了性能对比。结果表明:与管式反应器相比,微反应器能更好地发挥催化剂的低温活性。开发的CuNiFe结构化催化剂在10000 mL/(g·h)空速下仍能保持82.3%的甲醇转化率,单位质量催化剂的产氢量可达商用催化剂的2.62倍。使用自制催化剂,制氢系统冷态启动40 min可达到甲醇转化率100%的稳定产氢,显著低于使用商用催化剂结果。展开更多
A great challenge in water electrolysis is how to optimize the major factors that influence the production of hydrogen gas. Over the past years, different methods have been used to produce hydrogen gas from carbon-bas...A great challenge in water electrolysis is how to optimize the major factors that influence the production of hydrogen gas. Over the past years, different methods have been used to produce hydrogen gas from carbon-base fossil fuels but these methods have been proven to be environmentally unfriendly due to the enormous release of greenhouse gases associated with their use. In this work, an experimental study was carried out to evaluate the effect of electrolyte strength, voltage and time on the volume of HHO gas produced using a design built HHO gas generator. The generator was constructed from Stainless Steel 316 L plates made of 3 anodes, 3 cathodes, and 20 neutral plates. During the study, the strengths of KOH, NaOH, and NaHCO3 was prepared within the range of 0.010 M - 0.030 M. The prepared strengths for each catalyst were then varied across voltage range of 9 V to 13 V for 50 seconds. The experimental results obtained showed that, increasing electrolyte strength, voltage and time proportionally increased the yield of HHO gas. An optimal yield rate of 2.27 cm3/s of HHO gas was obtained when the generator was run at 13 V using 0.025 M KOH. In addition, other factors studied including electrode surface morphology, plate’s configuration, and temperature also showed improvement in yield of HHO gas by 41.85%, 69.74%, and 71.96% respectively.展开更多
文摘A great challenge in water electrolysis is how to optimize the major factors that influence the production of hydrogen gas. Over the past years, different methods have been used to produce hydrogen gas from carbon-base fossil fuels but these methods have been proven to be environmentally unfriendly due to the enormous release of greenhouse gases associated with their use. In this work, an experimental study was carried out to evaluate the effect of electrolyte strength, voltage and time on the volume of HHO gas produced using a design built HHO gas generator. The generator was constructed from Stainless Steel 316 L plates made of 3 anodes, 3 cathodes, and 20 neutral plates. During the study, the strengths of KOH, NaOH, and NaHCO3 was prepared within the range of 0.010 M - 0.030 M. The prepared strengths for each catalyst were then varied across voltage range of 9 V to 13 V for 50 seconds. The experimental results obtained showed that, increasing electrolyte strength, voltage and time proportionally increased the yield of HHO gas. An optimal yield rate of 2.27 cm3/s of HHO gas was obtained when the generator was run at 13 V using 0.025 M KOH. In addition, other factors studied including electrode surface morphology, plate’s configuration, and temperature also showed improvement in yield of HHO gas by 41.85%, 69.74%, and 71.96% respectively.
