The majority of energy being used is obtained from fossil fuels, which are not renewable resources and require a longer time to recharge or return to its original capacity. Energy from fossil fuels is cheaper but it faces some challenges compared to renewable energy resources. Thus, one of the most potential candidates to fulfil the energy requirements are renewable resources and the most environmentally friendly fuel is Hydrogen. Hydrogen is a clean and efficient energy carrier and a hydrogen-based economy is now widely regarded as a potential solution for the future of energy security and sustainability. Hydrogen energy became the most significant energy as the current demand gradually starts to increase. It is an important key solution to tackle the global temperature rise. The key important factor of hydrogen production is the hydrogen economy. Hydrogen production technologies are commercially available, while some of these technologies are still under development. Therefore, the global interest in minimising the effects of greenhouse gases as well as other pollutant gases also increases. In order to investigate hydrogen implementation as a fuel or energy carrier, easily obtained broad-spectrum knowledge on a variety of processes is involved as well as their advantages, disadvantages, and potential adjustments in making a process that is fit for future development. Aside from directly using the hydrogen produced from these processes in fuel cells, streams rich with hydrogen can also be utilised in producing ethanol, methanol, gasoline as well as various chemicals of high value. This paper provided a brief summary on the current and developing technologies of hydrogen that are noteworthy.

所使用的大部分能量来自化石燃料，而化石燃料不是可再生资源，需要更长的时间才能充电或恢复其原始容量。化石燃料的能源价格便宜，但与可再生能源相比，它面临一些挑战。因此，满足能源需求的最有可能的候选人之一是可再生资源，而最环保的燃料是氢气。氢是一种清洁高效的能源载体，氢经济现在被广泛认为是未来能源安全和可持续性的潜在解决方案。随着当前需求逐渐增加，氢能成为最重要的能源。这是解决全球气温上升的重要关键解决方案。制氢的关键重要因素是氢的经济性。氢气生产技术可商购获得，而其中一些技术仍在开发中。因此，全球范围内对减少温室气体以及其他污染物气体的影响的兴趣也在增加。为了研究氢作为燃料或能源载体的应用，涉及到各种过程中容易获得的广谱知识，以及它们的优缺点和在进行适合于将来开发的过程中的潜在调整。除了在燃料电池中直接使用由这些过程产生的氢气外，富含氢气的物流还可以用于生产乙醇，甲醇，汽油以及各种高价值的化学品。本文对当前值得注意的氢技术进行了简要总结。