Water gas shift (WGS) reaction enhanced by a membrane reactor technology has emerged as a high-efficiency alternative to conventional fixed-bed reactors in integrated gasification combined cycle (IGCC) plants for the electrical power generation with carbon dioxide capture. Herein, the WGS performance of a catalyst-free membrane reactor made of a CO₂-permeable ceramic–carbonate dual-phase (CCDP) membrane for converting coal gasification syngas to H₂ with CO₂ capture is studied using a one-dimensional and nonisothermal mathematical model coupled with a CO₂ permeation equation. The catalyst-free CCDP membrane reactor offers significantly enhanced WGS performance at high reaction pressures than a fixed-bed reactor. At 30 atm and 900 °C, WGS conducted in the single-stage, catalyst-free CCDP membrane reactor features a CO conversion >95%, a pure (100%) CO₂ flow at the permeate side with ultrahigh CO₂ capture ratio (>98%), and a retentate stream consisting of 100% recovered H₂ at a H₂ purity >90%. Due to a strong shift in thermodynamic equilibrium and the unique membrane characteristics, the CCDP membrane reactor achieves a superior performance in WGS, which will trigger innovation in catalytic membrane reactors and increase the competitiveness of a membrane reactor technology-based IGCC process with CO₂ capture.

中文翻译：

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用于高温水煤气变换的无催化剂陶瓷-碳酸盐双相膜反应器：模拟研究

通过膜式反应器技术增强的水煤气变换（WGS）反应已成为集成气化联合循环（IGCC）工厂中传统固定床反应器的高效替代品，用于二氧化碳捕集的发电。在本文中，由CO的无催化剂的膜反应器的性能WGS ₂可透过的陶瓷-碳酸盐双相（CCDP）膜，用于将煤气化的合成气至H ₂与CO ₂的捕获，使用一维和非等温研究带有CO _2的数学模型渗透方程。与固定床反应器相比，无催化剂CCDP膜反应器在高反应压力下可显着提高WGS性能。在30个大气压和900°C下，WGS在单级，无催化剂的CCDP膜反应器中进行，其CO转化率> 95％，渗透侧纯净（100％）CO ₂流动，具有极高的CO ₂捕集率（ > 98％），和由100％回收的H A滞留物流₂在ħ ₂纯度> 90％。由于热力学平衡的强烈变化和独特的膜特性，CCDP膜反应器在WGS中表现出优异的性能，这将触发催化膜反应器的创新，并提高基于膜反应器技术的IGCC工艺与CO ₂捕集的竞争力。。