PYROLYSIS OF RUBBER IN A SCREW REACTOR

On the basis of an analysis of thermal methods described in the literature and from the results of experimental
investigations of steam conversion, the authors have developed and created a facility for thermal processing of
rubber waste. Rubber crumb was used as the raw material; the temperature in the reactor was 500o
C; nitrogen,
steam, and a mixture of light hydrocarbons (noncondensable part of pyrolysis products) represented the working
medium. The pyrolysis yielded 36–38% of a solid fraction, 54–56% of a liquid hydrocarbon fraction, and 6–9% of
noncondensable gases. Changes in the composition of the gas mixture have been determined at different stages of
processing. Gas chromatography of pyrolysis gases has shown that the basic gases produced by pyrolysis are H2
and hydrocarbons C2H4, C3H6, C3H8, C4H8, C2H6, C3H6O2, and C4H10, and a small amount of H2S, CO, and CO2.
Noncondensable gases will be used as a fuel to heat the reactor and to implement the process.
On the basis of an analysis of thermal methods described in the literature and from the results of experimental
investigations of steam conversion, the authors have developed and created a facility for thermal processing of
rubber waste. Rubber crumb was used as the raw material; the temperature in the reactor was 500o
C; nitrogen,
steam, and a mixture of light hydrocarbons (noncondensable part of pyrolysis products) represented the working
medium. The pyrolysis yielded 36–38% of a solid fraction, 54–56% of a liquid hydrocarbon fraction, and 6–9% of
noncondensable gases. Changes in the composition of the gas mixture have been determined at different stages of
processing. Gas chromatography of pyrolysis gases has shown that the basic gases produced by pyrolysis are H2
and hydrocarbons C2H4, C3H6, C3H8, C4H8, C2H6, C3H6O2, and C4H10, and a small amount of H2S, CO, and CO2.
Noncondensable gases will be used as a fuel to heat the reactor and to implement the process.
Author:  A. V. Lozhechnik and V. V. Savchin
Keywords:  rubber waste, screw reactor, utilization technology
Page:  1482