In the context of the shipping industry emission reduction target set by the International Maritime Organization and based on the current situation of carbon reduction in the shipping industry, this paper introduces the development history and emission reduction advantages of hydrogen powered ships, analyzes the hydrogen storage methods of hydrogen powered ships at home and abroad and the safety risks of hydrogen energy onboard, and compares the technical advantages and onboard feasibility of various Marine hydrogen storage methods. It is concluded that the hydrogen production technology of shipboard methanol steam reforming is of great significance to solve the hydrogen safety problem of hydrogen?powered ships. At last, the problems faced in developing hydrogen?powered ships with shipboard hydrogen production units are put forward.

As a new type of clean, carbon?free, sustainable and efficient energy source, hydrogen has great potential in the future energy mix. Hydrogen purification by pressure swing adsorption is the main separation technology for hydrogen production with high purity, low energy consumption and high degree of automation. In this paper the progress in research and application of pressure swing adsorption hydrogen production in theoretical simulation, process control optimization and adsorbent materials were critically reviewed, and the future development of pressure swing adsorption hydrogen production technology was prospected.

Establish a metal hydride reactor and test platform, and obtain the corresponding internal temperature and hydrogen absorption/desorption flow data of the reactor under different water bath temperatures, hydrogen release flow rates, and reactor structures (square, honeycomb, and no barriers) through experimental tests to determine The temperature field distribution trends and rules of different reactor internal structures are analyzed. The results show that the square structure reactor has the fastest internal temperature change rate and the best heat exchange effect. The comprehensive performance of the square structure reactor under different hydrogen absorption pressures and hydrogen release flow rates was further studied. The results show that when the inlet pressure is 2.0 MPa to 3.0 MPa, the hydrogen absorption amount and hydrogen absorption rate of the alloy material can be significantly increased; when the hydrogen release flow rate is less than 3.2 L/min, more than 85% of hydrogen can be released. The research results can provide technical guidance for modular and systematic design.

In the methanol autothermal reforming reaction, the required heat is provided by the methanol oxidation reaction, so the activity of the methanol oxidation catalyst directly affects the yield of hydrogen. Pt/γ?Al₂O₃ catalysts have attracted wide attention because of its high reactivity, but their stability is poor, and the Pt activity center is easy to agglomerate. In order to solve the above problems, Pt/γ?Al₂O₃ catalysts were prepared by rotary microemulsion, and Pt/γ?Al₂O₃ catalysts were characterized by BET, XRD and other methods, and the effects of cyclohexane mass fraction, mass ratio of PEG?600 and n?butanol on the oxidation activity of methanol were investigated. The results show that the microemulsion method could improve the dispersion and utilization rate of the active components. By changing the mass fraction of cyclohexane and the mass ratio of PEG?600 to n?butanol, the active component Pt can be uniformly and firmly loaded on γ?Al₂O₃, and the sintering resistance of the catalyst can be improved. The Pt/γ?Al₂O₃ catalyst prepared under the condition of cyclohexane mass fraction of 50% and the mass ratio of PEG?600 to n?butanol is 3∶7, and the catalytic activity of methanol oxidation can reach 88%.

Catalysts CuCe?OH and CuCe?CO₃ were prepared by hydrothermal method using KOH and K₂CO₃ as precipitating agents. The catalyst was characterized by XRD, BET, H₂?TPR and TG?DTA, and its CO catalytic oxidation performance was evaluated by a fixed bed reactor. The results show that the type of precipitator not only has a great influence on the texture properties of the catalyst, but also determines whether the CuCe catalyst without heterocrystalline phase can be successfully prepared. The specific surface areas of CuCe?OH and CuCe?CO₃ catalysts were 96.5 m²/g and 17.3 m²/g, respectively. Under the evaluation conditions of 60 000 mL/（g·h）, CO volume fraction of 0.6%, O₂ volume fraction of 1.5%, Ar volume fraction of 97.9%, CuCe?OH catalyst showed good catalytic activity, and CO conversion reached 99.0% at 140 ℃.