The use of large amounts of deleterious solvents in the synthesis of metal–organic frameworks (MOFs) is one of the important factors limiting their application in industry.

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In this paper, graphite and Fe2O3 are introduced into MgH2 powder by the method of hydrogenation after magnetic grinding. Hydrogen storage materials which composite of MgH2–5 wt.% C and MgH2–5 wt.% C–5 wt.% Fe2O3 are successfully prepared. The physical structure of these materials was analyzed and characterized by XRD, SEM, etc. Furthermore, the influence of graphite and Fe2O3 on the hydrolysis of MgH2 was systematically investigated. The results show that MgH2–C–Fe2O3 composite powder has the fastest hydrogen release rate in municipal drinking water and the highest conversion rate. Graphite and Fe2O3 can effectively reduce the activation energy of the hydrolysis reaction of MgH2 and improve the hydrolysis kinetics of MgH2. The synergistic effect of the coaddition of graphite and Fe2O3 can significantly increase the hydrolysis conversion rate of MgH2 and improve the hydrolysis kinetics.

Trifluoromethane (CHF3) is a ubiquitous by-product of chlorodifluoromethane synthesis (CHClF2) and is regarded as one of the most potent greenhouse emissions. Despite the adverse effects on the environment, CHF3 is the general method of exhaust gas incineration and is used for other purposes, for example, as a coolant and in plasma etching. This project establishes a flexible and efficient two-stage vacuum pressure swing adsorption (VPSA) process to generate pure CHF3 and CHClF2 simultaneously, improving the product’s recovery rate. The first-stage VPSA unit loading activated carbon is developed to obtain CHF3 with the purity of 99%. CHClF2 of 99.5% purity is obtained from the second-stage VPSA unit with NaX zeolite. The process simulation predicts that the two-stage coupled VPSA separation system can obtain CHF3 and CHClF2 simultaneously. Under the best process parameters, the purity of CHF3, the recovery rate of CHF3, the purity of CHClF2, and the recovery rate of CHClF2 are 99, 77.71, 99.5, and 72.13%, respectively. In all, our research demonstrates that the two-stage VPSA system is a practicable and worthy prospect for research and development. In addition, it can recover and purify CHF3 and CHClF2 through an efficient and cost-effective method.