One-pot preparation of H-mixed CH fuel and CaO-based CO sorbent by the hydrogenation of waste clamshell/eggshell at room temperature.

The preparation of clean fuel or CO adsorbents using industrial and domestic garbage is an alternative way of meeting global energy needs and alleviating environmental problems. Herein, H-mixed CH fuel and CaO-based CO sorbent were first prepared in one pot by the mechanochemical reaction of pretreated clamshell or eggshell wastes (carbon and calcium source) with calcium hydride (hydrogen source) at room temperature. In the above reactions, CH was the sole hydrocarbon product, and its yield reached 78.

Acquiring an effective CaO-based CO sorbent and achieving selective methanation of CO.

CO capture, utilization, and storage are promising strategies to solving the problems of superfluous CO or energy shortage. Here, mechanochemical reduction of CO by a MgH/CaH mixture was first performed, by which we achieve selective methanation of CO and acquire an effective CaO-based CO sorbent, simultaneously. The selectivity of methanation is near 100% and the yield of CH reaches 30%.