Research on carbonization of agricultural by-products of coffee bean hulls and corn cobs by hydrothermal carbonization method, application as adsorbent and catalyst materials - 14
The surface structure of the original raw coffee bean hull/corn cob material and Hydrochar is shown in Figure 3.23. (a) Coffee bean hulls (b) Corn cob (c) Coffee bean hull hydrochar (d) Corn Cob Hydrochar Figure 3.23. SEM images of raw materials before activation (a) coffee bean hull, (b) corn cob, ...