3.2 Analysis of the catalyst
The morphology, size and microstructure of the selected catalysts from the Longan, Jackfruit,
Tamarind and Taengwood were investigated in detail through the SEM images.
Energy dispersive X-ray spectroscopy (EDS) was used to characterize the composition of these
composite materials. All catalysts were composed of carbon, oxygen, potassium and calcium as
the major elements.