Q$.$Can I use rapeseed oil or Svo to drive diesel engine to fulfill the need energy need of a small village in india? Give me some other names or examples of SVO

Q$.$Is rapeseed oil biodiesel? Or biofuel plz tell me the difference $?$

Q$.$ What about the carbon ash or soot $?$ In the diesel engine? Is there any other way to use it to provide electricity? Is it even efficienct $?$

Q$.$ Do I need to do some calculations like air fuel ratio. Or combustion etc?

Q$.$ Can liquid hydrogen fuel be used? $($ or hydrogenated liquid $($ which hold hydrogen $)$ then I dehydrogenated it and I send the pure liquid gas or hydrogen go produce electricity is that possible? $($ can I produce liquid hydrogen from hydrogenated liquid?