Method for producing high purity hydrogen by coupling hydrocarbon pyrolysis with electrochemical hydrogen separation

The invention relates to a method for producing hydrogen, characterized in that in a first step, hydrocarbons are decomposed into solid carbon and a hydrogen-containing product mixture, from which a hydrogen-containing gas product mixture having a composition of 20-95 vol% H2 and 80-5 vol% CH4 and/or N2, relative to the main components CH4, N2 and H2, is discharged at a temperature of 50-300 DEG C, feeding it to an electrochemical separation process at a temperature that differs from the outlet temperature by no more than 100 DEG C, in which second step the hydrogen-containing product mixture is separated in the electrochemical separation process at a temperature of 50-200 DEG C to a purity gt; 99.99% of hydrogen and the balance of a residual gas mixture. 本发明涉及一种生产氢气的方法，所述方法的特征在于，在第一步骤中将烃分解为固体碳和含氢产物混合物，在50-300℃的温度下将具有相对于主要组分CH4、N2和H2为20-95体积％H2和80-5体积％CH4和/或N2的组成的含氢气体产物混合物从第一步骤排出，将其以与该出口温度相差不超过100℃的温度供应给电化学分离工艺，在该第二步骤中，含氢产物混合物在电化学分离工艺中在50-200℃的温度下分离成纯度为>99.99％的氢气和剩余的残余气体混合物。