ABSTRACT

Integrated carbon capture and utilization (ICCU) simplifies the CO₂ utilization process by converting chemically combined CO₂ molecules into value-added chemicals, leading to a strong energy-saving effect by omitting the CO₂ separation process. Two reaction routes for the hydrogenation of amine captured CO₂ to methanol over heterogeneous catalysts were summarized: alcoholic hydroxyl groups-promoted CO₂ hydrogenation process over Cu or Pd-based catalysts via formate and ester route, and methanol production from the direct hydrogenation of formate over Au-based catalyst. The technical effectiveness of concurrent carbon capture with heterogeneous catalysis toward methanol via alcoholic hydroxyl groups-promoted CO₂ hydrogenation is similar to that of the gas-phase CO₂ hydrogenation to methanol over heterogeneous catalysts. The sintering of the catalysts, the phase change of the supports, the combination of amines and the catalysts (namely leaching), and the reaction of water with the supports can cause a decrease in the performance of the catalysts. Thus, it is important to rationally design next-generation stable catalysts to achieve amine captured CO₂ hydrogenation to methanol while at the same time regenerating amines. The development of heterogeneous catalysts for methanol synthesis in the liquid phase and the development of the CO₂ capture process for subsequent conversion(1 ~ 70%) were carefully reviewed. The integration and optimization of multi-pollutant efficient removal technology, selectively coupled CO₂ capture technology, and selective routes for methanol synthesis can achieve industrial verification in typical power plants, which is of great significance in promoting energy conservation, emission reduction, and low-carbon footprint.

摘要

综合碳捕获和利用（ICCU）通过将化学结合的CO ₂分子转化为增值化学品来简化CO ₂利用过程，通过省略CO ₂分离过程实现强大的节能效果。_{总结了多相催化剂上胺捕获的 CO 2}加氢制甲醇的两条反应路线：醇羟基促进 CO ₂通过甲酸盐和酯途径在 Cu 或 Pd 基催化剂上进行氢化工艺，以及在 Au 基催化剂上通过甲酸盐直接氢化生产甲醇。通过醇羟基促进CO ₂加氢并发碳捕获和多相催化制甲醇的技术有效性类似于在多相催化剂上气相CO _{2加氢制甲醇的技术有效性。}催化剂的烧结、载体的相变、胺与催化剂的结合（即浸出）以及水与载体的反应都会导致催化剂性能下降。因此，合理设计下一代稳定的催化剂以实现胺捕获CO _{2非常重要}氢化生成甲醇，同时再生胺类。仔细回顾了液相甲醇合成多相催化剂的开发和用于后续转化（1~70%）的CO _{2捕集工艺的开发。}多污染物高效脱除技术、选择性耦合CO ₂捕集技术、甲醇合成选择性路线的集成优化，可在典型电厂实现工业化验证，对促进节能减排、低碳排放具有重要意义。碳足迹。