The main objective of ALL-IN Zero is to develop a multi-fuel system that will feed low, zero or carbon negative fuels like ammonia, natural gas, biogas or alcohols among other easy-handling fuels, into a Compact Membrane Reactor (CMR) producing an intermediate temporary energy vector (i.e. hydrogen). The temporary energy vector will be consumed in situ by ICE and FCS to generate electrical and mechanical power with zero emissions. In addition, this technology will implement efficient energy recovery strategies by means of thermal, mechanical and electrical energy exploitation to sustain CMR operation and will turn emissions of CO₂ stream coming from CMR (in case they exist due to the fuel type) into business opportunity by means of efficient Carbon Capture and Storage (CCS) techniques to produce synthetic fuels, among other high value uses.