The fixed bed reaction of residual natural rubber for oil production by pyrolysis process

摘要

The aim of this study is to use pyrolysis reaction to produce oil product as a fuel or chemical feedstock. The fixed bed reactor was used as a pyrolysis system. The pyrolysis reaction of residual para rubber was operated in the absence of catalyse. The operating conditions such as particle size (0.5 and 1.0 cm~3) and pyrolysis temperature (500, 550 and 600°C) were studied under N_2 conditions and retention time 90 min. The result shows the para rubber size 1.0 cm~3 can be produced liquid phase more than of para rubber size of 0.5cm~3. The optimised condition with the highest oil yield was at 550°C with rubber size of 1.0 cm~3. The percentage of the product was 60% of liquid, 35% of gas and 5% of solid (char). Furthermore, the FTIR result can be presented the supported evidence that the transformation of aliphatic contents to be aromatic contents was increased with increased temperature. Also, GC-MS was used for the identification and quantification of the product. It was found 5 major products that can be used as a chemical feedstock. The maximum amount of component was 2-Benzenedicarboxylic acid, diisooctyl ester (Isooctyl phthalate) with 22.08%. This is a plasticizer with higher cost than fuel.