Dimethyl Ether (DME) and DME/LPG mixtures resistance characteristics of modified natural rubber compounds

Handayani, Hani; Cifriadi, Adi; Ramadhan, Arief; Falaah, Asron Ferdian; Hermawan, Nanang Triagung Edi; Yuliarita, Emi

doi:10.1088/1755-1315/572/1/012036

Cited by 1 publication

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“…Grazia De Angelis et al measured the permeability, diffusivity, and solubility of DME in several FKMs, finding that those with a high vinylidene fluoride content exhibited a high permeability of over 1000 barrer at 4 atm. Handayani et al studied the effect of DME and a DME/LPG blend on vulcanized natural rubber (NR) and NBR, with both elastomers losing tensile strength and reduced elongation at breakage of 29 and 68%, dependent on the degree of vulcanization. A similar result was obtained by Saputra et al for NR immersed in DME, with plasticizers and carbon fillers present.…”

Section: Introductionmentioning

confidence: 99%

Compatibility of High-Density Polyethylene Piping and Associated Elastomers with the Renewable Fuels Ammonia and Dimethyl Ether

2022

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Ammonia (NH 3 ) and dimethyl ether (DME) have been identified as sustainable hydrogen carrier fuels in a lowcarbon-emission economy. Here, the compatibility of polymer materials within the natural gas distribution network is investigated, specifically high-density polyethylene (HDPE) plastic piping and two associated elastomer materials, poly(styrene-co-butadiene) (SBR) and poly(acrylonitrile-co-butadiene) (NBR). The compatibility between hydrogen carrier fuels and these piping systems is expressed in terms of polymer solubility, diffusivity, and importantly permeability. The sorption of methane, ammonia, and DME into HDPE and the two elastomers was linear with pressure, indicative of rubbery polymer behavior, and modeled through Henry's law. The highly condensable nature of ammonia and DME resulted in substantially higher solubility in all materials compared to methane, with both SBR and NBR having significantly higher solubility for both fuels compared to HDPE. Similarly, the permeability of ammonia and DME in HDPE and both elastomers was greater than that of methane, with NBR permeating both ammonia and DME orders of magnitude faster than HDPE, indicative that the elastomers will be a significant leak source. DME plasticized both HDPE and the elastomers, as evident by strong pressure-dependent and time-dependent permeability. As a result, a deterioration of up to 14 and 13% in the tensile stress and elongation at break, respectively, was observed in HDPE exposed to DME. We conclude that conventional HDPE pipeline material can successfully transport ammonia, with high leakage expected from the associated elastomers, but the HDPE pipeline transport of DME is not viable due to the fuel's strong interactions that alter the intrinsic properties of both HDPE and the elastomers.

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Section: Introductionmentioning

confidence: 99%