Because of the energy crisis in Thailand, the new choices energy is considered in many research
topics. Since Thailand is the agricultural country and has a plentiful of agricultural waste, the several
types of agricultural waste usually are converted to be value material such as oil or solid fuel. Many
researchers have been reported some materials were converted to be bio-oil such as tea residue [1],
safflower seed residue [2] and rice straw [3] etc. The information from ministry of agriculture and
cooperatives showed Thailand is the famous place for Para rubber products in the world. Annually,
Thailand supplies the Para rubber seed around 109,000 tons/year, only 50% of them are used for the next
agricultural cycle and another 50% of them are discarded to be waste. Usually, Para rubber seed
comprises of two compositions are as fresh and shell, the previous research [11] showed that the crude oil
concept to convert Para rubber seed to be bio oil by using pyrolysis process was interested because Para
rubber seed is the priceless material and bio oil supplied from the process could be the important
precursor for esterification reaction and burned directly. In this research, Para rubber seed supplied from
the southern of Thailand is prepared to two parts, firstly shell and residue that is flesh extracted. They are
pyrolyzed to be bio oil by using designed reactor. Some factors are studied for evaluation of the optimum
pyrolysis condition, such as particle size of shell, carrier gas flow [5] and pyrolysis temperature. Each
sample is determined and analyzed in term of yield and fuel properties.