Table 1.

Summary of the past research related to the present study.

Details of the study	Advantage and drawbacks	Reference
E-waste to hydrogen energy via gasification process	It found a marginal enhancement in hydrogen, variation in carbon conversion, which was used as an alternative fuel for an internal combustion engine	2
E-Waste-to-energy production via plasma gasification process	It led to an enhanced hydrogen yield and higher gasification efficiency. However, increased thermal loss limits the overall performance	9
Medical waste to hydrogen energy via plasma gasification process	An increased microwave heating of plasma gasification showed an improved hydrogen yield, and increased equivalence ratios limit the hydrogen yield.	14
Algae Biomass to hydrogen energy via plasma gasification	This technique was found to be economic and to have a superior exergy efficiency. However, it found a higher acid level, which leads to variation in energy production	17
Reviewed the various techniques for waste-to-energy	Economic and plasma gasification techniques provide a higher energy conversion. But, without a heat recovery system limits the overall gasification process and limits the gasification efficiency	20