Open Access

Table 1

Information and suppliers’ names of materials used in this work.

Material Chemical formula Supplier Purity
Methane CH4 Air product 0.9995 (mole fraction)
TetraButylAmmonium Bromide (TBAB) (CH3CH2CH2CH2)4N(Br) Merck ≥0.9900 (mass fraction)
TetraButylAmmonium Acetate (TBAA) (CH3CH2CH2CH2)4N(OCOCH3) Sigma–Aldrich 0.9700 (mass fraction)

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