综述了常规MgO的CO2吸附性能，针对MgO吸附CO2存在的问题，重点介绍了提高MgO吸附CO2性能的方法，主要包括优化结构和添加 碱金属熔融盐 等可行方法。 最后综合分析了MgO吸附剂用于工业CO2捕集的优势及面临的挑战，从MgO的制备工艺、规模化成型及捕集CO2系统设计优化等方面对今后的研究方向进行了展望。 MgO较低的CO2吸附量一方面是由于常规MgO比表面积较小，表面碱性位密度较低，碱性位点暴露少。 另一方面，MgO吸附CO2后表面形成的碳酸 …

2022年8月1日 · MgO-based sorbents have seen a boost in activity since the discovery of molten alkali metal salt promoters, and yet, they practically remove CO2 from a gas stream efficiently only at very high pressures (p > 10 bar), rendering them suitable for precombustion, but not for postcombustion CO 2 capture schemes.

2020年7月3日 · Here we detail a land-based enhanced weathering cycle utilizing magnesite (MgCO 3) feedstock to repeatedly capture CO 2 from the atmosphere. In this process, MgCO 3 is calcined, producing caustic...

2021年1月1日 · MgO-based adsorbents are promising due to their abundant availability, wide temperature range, and tuneable physicochemical properties. Over the last decade, there has been a growing number of MgO-based adsorbent studies using various improved approaches that have achieved high CO 2 capture performance.

2025年2月10日 · In this work, MgO single crystals were reacted in air or CO 2 at varying humidities and characterized by X-ray scattering, microscopy, and vibrational spectroscopy. Results show that the hydroxylation formed a brucite (Mg (OH) 2)-like layer immediately after crystal cleaving.

2025年2月1日 · The AMS-MgO-MC pellets modified with an MC template showed a considerable improvement in CO 2 uptake of 7.54 mmol CO 2 /g; the adsorption took place from a gas mixture containing 50 % CO 2 conducted at 340 °C [40].

2024年9月13日 · 在分子动力学（MD）模拟中，为了研究MgO颗粒尺寸和晶体结构对吸附性能的影响，建立了四组不同的MgO捕获CO2的吸附模型，如图1所示。 模型的更多细节见参数设置表。 在填充过程中使用Materials Studio（MS）商业软件中的无定形填充任务。 分子是以蒙特卡罗方式构造的，通过最小化原子之间的紧密接触，同时保持真实的扭转角分布。 为了赋予最小能量状态，首先利用共轭梯度算法进行几何优化，能量收敛为1×10−5 kcal/mol，力容限为1×10−5 …

Two MgO samples, hereafter referred to as sample A and sample B, were prepared by calcinating MgCO 3 rich minerals as a proxy for mine tailings obtained from the Calix mine in Australia and the Premier mines of Nevada, USA, respectively. The minerals obtained were calcined at 600 °C for 2 h to regenerate the MgO. ... J. CO2 Util., 2021, 50, ...

At these rates, only 3–18% of the MgO would react in 1 yr and require areas of 80,000–455,000 km2 to sequester 1 Gt CO2/yr. Gas-filled porosity of 39–58% and water contents of 7–17 wt% were optimal for CO2 ingress and carbonation. Dypingite [Mg5(CO3)4(OH)2·5H2O] was the sink of atmospheric CO2 and TIC increased from 0.2% to 7.5% CO2.

2024年10月14日 · Here we design Cu/ZrO x clusters on MgO with near atomic precision for CO 2 hydrogenation using a liquid-phase atomic layer deposition method. The controlled cluster structure modulates the...