The vast chemical and structural tunability of metal–organic frameworks (MOFs) are beginning to be harnessed as functional supports for catalytic nanoparticles spanning a range of applications. However, a lack of straightforward methods for producing nanoparticle‐encapsulated MOFs as efficient heterogeneous catalysts limits their usage. Herein, a mixed‐metal MOF, NiMg‐MOF‐74, is utilized as a template to disperse small Ni nanoclusters throughout the parent MOF. By exploiting the difference in NiO and MgO coordination bond strength, Ni2+ is selectively reduced to form highly dispersed Ni nanoclusters constrained by the parent MOF pore diameter, while Mg2+ remains coordinated in the framework. By varying the ratio of Ni to Mg in the parent MOF, accessible surface area and crystallinity can be tuned upon thermal treatment, influencing CO2 adsorption capacity and hydrogenation selectivity. The resulting Ni nanoclusters prove to be an active catalyst for CO2 methanation and are examined using extended X‐ray absorption fine structure and X‐ray photoelectron spectroscopy. By preserving a segment of the Mg2+‐containing MOF framework, the composite system retains a portion of its CO2 adsorption capacity while continuing to deliver catalytic activity. The approach is thus critical for designing materials that can bridge the gap between carbon capture and CO2 utilization.

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A metal–organic framework, known as Mg-CUK-1, is loaded with Ru and Ni nanoparticles and evaluated as a hybrid sorbent/catalyst for the integrated capture and conversion of carbon dioxide to methane under temperature-swing operating conditions.

The pilot-scale production of two magnesium citrate products, using a waste bittern discharged from a salt work as the raw material, was conducted in this study. Magnesium citrate nonahydrate and anhydrous magnesium citrate were prepared via crystallization and spray drying techniques, respectively, and characterized for purity, crystalline structure, particle shape, particle size distribution, and other properties. The material and energy costs were estimated based on technical data obtained from the pilot trials in conjunction with specific energy consumption of equivalent industrial-scale equipment. The costs were used to evaluate and compare the economic feasibility of both processes on a commercial scale. Although the material and energy costs at US$ 924 and US$ 33–81 per tonne, respectively, required to make magnesium citrate nonahydrate are lower than for anhydrous magnesium citrate at US$ 1256 and US$ 141 per tonne, respectively, the higher market price of anhydrous magnesium citrate at US$ 5000 per tonne compared to US$ 3000 per tonne for the hydrated form suggests production via spray drying is potentially the more profitable approach.