Pyrolysis of latex gloves in the presence of Y-zeolite

Abstract

In this study we have investigated the possibility of processing waste rubber gloves using pyrolysis. Y-zeolite catalyst was employed to upgrade the pyrolysis products to give higher yields of valuable aromatic compounds such as toluene and xylenes. The composition of the pyrolysis products was determined using GC-MS, GC-FID, GC-TCD, and FT-IR. It was found that when rubber gloves were pyrolysed in the absence of a catalyst, the pyrolysis oil consisted mainly of limonene and oligomers of polyisoprene. When Y-zeolite was added to the reaction system, the yields of toluene, xylene, methylbenzenes, ethylbenzenes, and naphthalenes increased dramatically. The Y-zeolite also catalysed the decomposition of limonene, which was absent from the catalytic pyrolysis products. The presence of the Yzeolite catalyst also increased the yield of hydrocarbon gases. The tests were carried out at both 380°C and 480°C and it was found that the higher reaction temperature led to increased yields of all the major compounds, both in the presence and absence of the Y-zeolite catalyst.

A review of dipentene (dl-limonene) production from waste tire pyrolysis

“…Actually, the scission of the ˇ bonds in the main polyisoprene chain is mostly considered to be random. The fact that Groves et al and Hall et al observed isoprene oligomers (up to hexamers) as the product of the thermal degradation of natural rubber and latex gloves, respectively, also stipulates that the scission is random [25,31].…”

“…Although no exact rubber contents are presented for the three tires types, it can be estimated from the presented DTG curves of MT that it has more BR and SBR than natural rubber or synthetic polyisoprene [62]. Hall shows dipentene yields for the pyrolysis of latex gloves [31].…”

“…Most of these studies use acidic catalysts (various types of zeolites), see Table 5 [31,37,[49][50][51][65][66][67][68][69][70]. Generally, the objective (and the result) of the usage of this type of catalyst is an increase in the yield of single-ring aromatics.…”

Recycled Natural Rubber Latex Gloves Filled Chloroprene Rubber: Effects of Compatibilizers

“…After its use, NRG is generally convert to waste rubbers which is difficult to biodegrade because polyisoprene chains of NR are crosslinked either by sulphur or peroxide system [6,7]. The problem of NRG waste started in growing as a direct result of diseases diffusion and population growth.…”

The Effect of Drying Time on Mechanical Properties of Natural Rubber Latex (NRL) Film Filled with Nanocrystal Cellulose (NCC) from Corn Cobs Waste Using Dispersion Agent Polyvinylpyrrolidone (PVP)

“…The additions of the contents in the NRL compound can strengthen the vulcanized NRL product, so its properties such as tensile strength are increased [4].…”