The regeneration results can be further improved by using a sweep gas that can purge the adsorbent bed during heating. Using steam as purge gas can be a practical approach to enhance heating during both microwave and conductive heating. Another approach can be using previously recovered C2H4/CO2 to ensure purging without diluting the product gas. It is expected that using C2H4/CO2 as purge gas would speed up the desorption process and improve heating and therefore warrants further investigation.