Dear Ketan,

The efficiency of mechanical compressors are far better than metal hydride compressor. The efficiency of mechanical compressors generally fall over 50% while metal hydride hydrogen compressors (MHHC) posses maximum efficiency up to 25% (based on reported literature).

But frankly speaking, MHHC are thermal compressor. The supplied energy is a low grade energy (Heat). However, mechanical compressor intake electricity (high grade energy). So, comparison just based on efficiency is not justifiable.

I hope I was able to answer your query.

Regards

Abhishek Parida