Hydrides, metal 482 INDEX

Several of the partially lower-alkylated derivatives of non-metal hydrides are pyrophoric in air. With other gaseous oxidants (halogens, etc.) the reaction may be explosive. The class includes the groups and the individually indexed compounds Diethylarsine, 1714 Dimethylarsine, 0933 Ethylmethylarsine, 1289 Methanetellurol, 0488 f Methanethiol, 0487 ALKYLBORANES... 

Substrates covered are listed in the index page. Most investigators have worked with the complex hydrides of boron and aluminum therefore reactions with these form the principal part of the discussion. Some work with other organometallic hydrides and complex hydrides of some transition metals is also described. 

Hydrogen powered cars are assessed similarly to transport units. In fact for a mobile unit, credit factors of releases caused by crash accidents can be considered at least an order of magnitude more probable than operative failures. Overall indices for a single vehicle are reported in Table 4. The analysis of both the potential index (PI) and the hazard index (HI) immediately reveals that the innovative technology of metal hydrides yields safer storages by the application of the moderation principle of inherent safety (CCPS, 1996). 

However, the adoption of novel technologies, though inherently safer, may introduce new hazards when auxiliary units are accormted. In fact the shell tube heat exchangers required by metal hydride technology in Chain 2 and 3 may origin quite easily LOCs. This is accounted for in the UHl indices. This confirms that a key issue that influences the values of the overall hazard index is the plant complexity, in terms of auxiliary equipments and secondary imits. 

---