A. Material preparation
Para rubber seed discarded from agricultural process was supplied from Surat Thani province in
southern of Thailand. It was separated two parts, shell from grinding process and residue from extraction
process. They were dried at 120 C an overnight for humidity controlled lower than 5%. Then, dried shell
was sized on 1.13 and 2.18 mm but could not for residue because its structure was very soft. Both of shell
and residue were analyzed in proximate analysis as showed in Table 1 and kept in desiccators.
Table 1. Proximate Analysis
B. Pyrolysis reactor setup
The pyrolysis reactor was designed and set up as showed in Fig.1. The column containing the shell or
residue made from stainless steel No.316 and was sloped around 15 for pouring liquid product and
preventing accumulation. Nitrogen was flowed into higher side of column while the tube furnace heated
up to the decided temperature. The gas product was taken to condenser unit for liquid condensation that
was called bio oil. Moreover, this process provided more two products as liquid product or tar from lower
side column and solid product or charcoal that remained in column after the pyrolysis process finished.
Feed stock
Proximate Analysis
Ash
content Moisture Volatile
matter
Fixed
carbon
Shell
Residue