The main object of this research is CO₂ conversion to dimethyl ether (DME) based on the coupling methane tri-reforming and DME synthesis units and investigation the performance of developed process by a detail mathematical model. In the developed process, CH₄ and CO₂ as low-cost feedstocks are converted to DME as green and economic energy carrier that has a lower environment, infrastructure, and transportation issues compared to CH₄. In the proposed process, the syngas produced through methane tri-reforming feeds to the DME reactor without any rigorous separation. To investigate the efficiency of the developed process, the conversion section of plant is modeled based on the mass and energy balance equations considering heat and mass transfer resistances, while the separation unit is simulated by an equilibrium-based model. In the next step, an optimization problem is formulated to calculate the optimal operating conditions of process to achieve maximum DME production considering process limitations. The simulation results show that considering some quench points on the tri-reformer to distribute the feed stream along the reactor increases DME production capacity from 150.9 to 243.5 ton day⁻¹.

这项研究的主要目的是基于甲烷三重整和DME合成单元的耦合，将CO ₂转化为二甲醚（DME），并通过详细的数学模型研究所开发过程的性能。在开发过程中，作为低成本原料的CH ₄和CO ₂被转换为DME，成为绿色和经济的能源载体，与CH ₄相比，其环境，基础设施和运输问题更少。在提出的方法中，通过甲烷三重整进料将生成的合成气送入DME反应器，而没有进行任何严格的分离。为了研究所开发过程的效率，在考虑了传热和传质阻力的情况下，基于质量和能量平衡方程对工厂的转化段进行建模，而通过基于平衡的模型对分离单元进行模拟。在下一步中，考虑到工艺限制，制定一个优化问题来计算工艺的最佳操作条件，以实现最大的DME生产。模拟结果表明，考虑到三重整炉上的一些淬火点以沿反应器分配进料流，DME生产能力将从150.9吨增加到243.5吨日^-1。