Increase in the world energy demand also increases the concentration of CO₂ in the atmosphere, which contributes to global warming and ocean acidification. This study proposed the simulation process to utilize CO₂ released from the acid gas removal unit in one of gas processing plants in Indonesia to enhance the production of dimethyl ether (DME) through unreacted gas recycle that can be beneficial in reducing CO₂ emission to the atmosphere. Simulation was developed in Unisim R390.1 using Peng–Robinson–Stryjek–Vera (PRSV) as a fluid package. Simulation was validated by several studies conducted by many researchers and giving satisfactory results especially in terms of productivity, conversion, and selectivity as a function of reactor temperatures in the indirect and the direct DME synthesis processes. Simulation results show that the DME production was enhanced by around 49.6% and 65.1% for indirect and direct processes, respectively, at a recycling rate of 7 MMSCFD. Compressor is required to increase the unreacted gas pressure to the desired pressure in the methanol reactor or dual methanol-DME reactor in both processes. Specific power consumption (SPC) was used as a tested parameter for the effectiveness of recycling unreacted gas. Based on the simulation, the direct DME synthesis process is superior over the indirect process in terms of DME and methanol productions, SPCs, and system energy efficiencies.

中文翻译：

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二氧化碳利用过程模拟以提高二甲醚（DME）的产量

世界能源需求的增加也增加了大气中CO ₂的浓度，这导致了全球变暖和海洋酸化。这项研究提出了一种模拟过程，该过程利用印度尼西亚一家气体处理厂中的酸性气体去除装置释放的CO ₂来通过未反应的气体再循环提高二甲醚（DME）的产量，这可能有利于减少CO ₂排放到大气中。在Unisim R390.1中使用Peng–Robinson–Stryjek–Vera（PRSV）作为流体包装开发了仿真程序。通过许多研究人员进行的数项研究对模拟进行了验证，并给出了令人满意的结果，尤其是在间接和直接DME合成过程中，生产率，转化率和选择性随反应器温度而变化。模拟结果表明，在7 MMSCFD的回收率下，间接和直接工艺的DME产量分别提高了约49.6％和65.1％。在这两个过程中，都需要压缩机将未反应的气体压力增加到甲醇反应器或双甲醇-DME反应器中的所需压力。使用比功率消耗（SPC）作为再循环未反应气体有效性的测试参数。