On this board we obey the laws of thermodynamics.
Different capacitors have different properties, such as ranges of capacitance or voltage ratings, absence of polarity, stability, tolerance, temperature ratings, ESR, self inductance, leakage, failure modes, etc., etc.
Questions 1, 2, and 3 show a lack of understanding of fundamental electronics or you're explaining yourself very poorly.
Frankly it doesn't matter, because if by "perpetual motion" you mean what is generally accepted as its meaning then it's not going to work.
1) diodes don't change voltage
2) volts do not flow through things
3) may be a reference to the inductive kick from an inductor when current is interrupted. If so a resistor is unlikely to be what you need, especially when you are trying for more than 100% efficiency.