Introduction Hydrogen production from natural gas has the advantages of low cost and significant scale effect. The research and development of more advanced new process technology for hydrogen production from natural gas is an important guarantee to solve the problem of cheap hydrogen source. As a high-quality and clean industrial energy, natural gas has important strategic significance in the process of energy development in China. Because natural gas is not only an important fuel for people's daily life, but also the basic raw material of many chemical secondary products. Hydrogen production from natural gas is one of many natural gas products. Liaohe Oilfield, as the third largest oil and gas field in China, is rich in natural gas resources, especially in oil and gas centralized processing enterprises. In the process of oil and gas production, we can produce a considerable scale of associated dry gas, which has unique conditions for natural gas deep processing, It has more extensive practical significance for promoting the development and popularization of natural gas hydrogen production process. Selection and theoretical analysis of hydrogen production from natural gas As a secondary chemical product, hydrogen is widely used in pharmaceutical, fine chemical, electronic and electrical industries. In particular, hydrogen, as the preferred fuel for fuel cells, will have broad market prospects in the field of transportation and power generation in the future, and will occupy a more and more important position in the future energy structure. Traditional hydrogen production methods, such as light hydrocarbon steam conversion, water electrolysis, methanol cracking, coal gasification and ammonia decomposition, are relatively mature. However, there are "one high and two low" problems such as high cost, low yield and low labor efficiency. In the process of oil and gas production in Liaohe Oilfield, there are hydrocarbon resources such as dry gas and naphtha. Using this method to produce hydrogen can maximize the utilization of resources. Moreover, the main component of the associated natural gas is methane, which can be converted into hydrogen by hydrocarbon steam, with high production purity and high production efficiency. Process principle of hydrogen production from natural gas The main processing processes of natural gas include atmospheric and vacuum distillation, catalytic cracking, catalytic reforming and aromatics production. At the same time, it includes natural gas exploitation, gathering and transmission and purification. Under certain pressure, high temperature and catalyst, alkanes and steam in natural gas react chemically. The reforming gas enters the converter after heat exchange in the boiler to convert CO into H2 and CO2. After heat exchange, condensation and steam water separation, the gas is sequentially passed through the adsorption tower equipped with three specific adsorbents through program control, and N2, Co, CH4 and CO2 are pressurized and adsorbed by pressure swing adsorption (PSA) to extract product hydrogen. Depressurization analysis releases impurities and regenerates the adsorbent Reaction formula: CH4 + H2O → CO + 3h2-q CO + H2O → CO2 + H2 + Q Main technical indicators. Pressure: 1.0-2.5mpa; Unit consumption of natural gas: 0.5-0.56nm3/nm3 hydrogen; Power consumption: 0.8-1.5/nm3 hydrogen; Scale: 1000 Nm3 / H ~ 100000 Nm3 / h; Purity: conform to industrial hydrogen and pure hydrogen (GB / t7445-1995); Annual operation time: more than 8000h.