Hydrogen gas can be generated from simple alkanes (e.g., n-pentane, n-hexane, etc.) and diethyl ether (EtO) by mechanochemical energy using a planetary ball mill (SUS304, Fritsch Pulverisette 7), and the use of stainless steel balls and vessel is an important factor to generate the hydrogen. The reduction of organic compounds was also accomplished using the in-situ-generated hydrogen. While the use of pentane as the hydrogen source facilitated the reduction of the olefin moieties, the arene reduction could proceed using EtO. Within the components (Fe, Cr, Ni, etc.) of the stainless steel, Cr was the metal factor for the hydrogen generation from the alkanes and EtO, and Ni metal played the role of the hydrogenation catalyst.

A robust and quantitative gaseous hydrogen generation method has been developed in an effort to achieve efficient H 2 generation derived from H 2 O. The present reaction could be achieved by a simple ball friction (milling) reaction of H 2 O using a planetary ball mill machine with a stainless-steel vessel and balls. It was mediated by metals as an element of stainless steel of the ball mill and also promoted by mechanochemical processing.

A one-pot continuous-flow method for hydrogen (deuterium) generation and subsequent hydrogenation (deuterogenation) was developed using a stainless-steel (SUS304)-mediated ball-milling approach. SUS304, especially zero-valent Cr and Ni as constituents of the SUS304, and mechanochemical processing played crucial roles in the development of the reactions.

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A continuous pilot plant for the degradation of polychlorinated biphenyls (PCBs) by the palladium on carbon (Pd/C)-catalyzed hydrogenation in the presence of triethylamine was designed and constructed. Both undiluted PCBs obtained from a capacitor and diluted PCBs with desulfurized trans oil were smoothly decomposed at ambient temperature and pressure. Desulfurization of the trans oil was found to be essential for the efficient degradation due to the possible deactivation of the Pd/C by catalysis poisoning due to the sulfur-containing materials in the oil. The combined use of the present degradation method and the catalytic desulfurization technology for the purification of gasoline and kerosene could be used in practical applications.