基于网状催化剂的微反应器内甲醇制氢性能

Hydrogen production performance of methanol in microreactor based on mesh-type catalyst

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。

Hydrogen fuel cell is regarded as one of the most promising energy technologies in the future.On line hydrogen production by liquid methanol can effectively solve technical bottlenecks such as hydrogen storage and transportation.A plate type microreactor and a matching hydrogen production system were designed.A novel CuNi(Fe)/γ-Al 2 O 3/Al mesh-type structured catalyst with self-reduction characteristic was prepared.The catalytic performances of the prepared catalyst and commercial CuZn catalyst were investigated in microreactor and tubular fixed bed reactor for comparison.The results show that the prepared catalyst in the microreactor exhibits higher low temperature reactive activity than the one in the tubular reactor.The CuNiFe structured catalyst can maintain 82.3%conversion rate even at a gas hourly space velocity of 10000 mL/(g·h)and the hydrogen production of the prepared catalyst can reach 2.62 times that of the same mass commercial catalyst pellet.Using the prepared mesh-type catalyst,the methanol conversion can achieve 100%and the hydrogen production is stable at cold start-up 40 min,which is significantly shorter than the start-up time of using commercial catalyst pellet.