Syngas is an important intermediate feedstock to produce various downstream chemicals and clean fuels. In this study, two standalone process models are first developed to produce syngas from coal gasification and natural gas dry reforming which provide the results for benchmarking the conceptual design. Two process models are then developed by integrating the gasification and dry-reforming models in the parallel and series configuration to improve the process performance. All the models are developed in Aspen Plus for producing the syngas at the rate of 10,000 kmol/h with H₂/CO ratio of 2. The heat integration is also developed in a way to utilize the heat energy from the coal-derived syngas into the dry-reformer without any energy penalties. The performance of the proposed designs is compared to the standalone processes in terms of the energy, emissions and economics. The energy analysis reveals that the integrated design requires 62% less energy input compared to the standalone dry reforming process. The results also show that combining the synergies of the two technologies reduce the CO₂ emission by 53.5% compared to the standalone gasification process. In addition to improved process efficiency and reduced emissions, the integrated design offers the lowest syngas production cost of $ 0.99/kmol among all the designs. The proposed integrated designs can enable the utilization of fossil fuels in an environment friendly, technically feasible and an economical way.

合成气是生产各种下游化学品和清洁燃料的重要中间原料。在这项研究中，首先开发了两个独立的工艺模型，用于从煤气化和天然气干重整生产合成气，为概念设计的基准测试提供结果。然后通过在并联和串联配置中集成气化和干重整模型来开发两种工艺模型，以提高工艺性能。所有模型都是在 Aspen Plus 中开发的，用于以 10,000 kmol/h 的速度和 H ₂生产合成气/CO 比为 2。热集成的开发方式还可以将来自煤的合成气的热能利用到干重整器中，而不会产生任何能量损失。拟议设计的性能在能源、排放和经济方面与独立过程进行了比较。能源分析表明，与独立的干重整工艺相比，集成设计所需的能源输入减少了 62%。结果还表明，结合两种技术的协同作用可以减少 CO ₂与独立气化过程相比，排放量减少了 53.5%。除了提高工艺效率和减少排放外，集成设计还提供了所有设计中最低的合成气生产成本 0.99 美元/kmol。提议的集成设计可以以环境友好、技术可行和经济的方式利用化石燃料。