Liquid formulation for hydrogen storage
The present invention relates to a liquid formulation comprising an amount greater than or equal to 50% by weight of benzyl toluene and an amount less than or equal to 10 ppm by weight of at least one hydrocarbon having a molar mass less than or equal to 100 g mol −1 . The invention also relates to the use of said formulation, comprising an amount less than or equal to 10 ppm by weight of light hydrocarbon, as LOHC for producing hydrogen.
1 . A liquid formulation comprising:
an amount of greater than or equal to 50%, by weight of benzyltoluene (BT), relative to the total weight of the formulation, and
at least one hydrocarbon having a molar mass of less than or equal to 100 g mol −1 in an amount of less than or equal to 10 ppm by weight.
2 . The formulation as claimed in claim 1 , comprising an amount of greater than or equal to 98% by weight of benzyltoluene.
3 . The formulation as claimed in claim 1 , comprising one or more other liquid organic hydrogen carriers (LOHC) fluids obtained from petroleum products and/or from products synthesized from petroleum products, or else obtained from renewable products and/or from products synthesized from renewable products.
4 . The formulation as claimed in claim 1 , comprising one or more other LOHC fluids selected from the group consisting of dibenzyltoluene, diphenylethane, diphenylmethane, ditolyl ether, phenylxylylethane, mono-and bixylylxylenes, 1,2,3,4-tetrahydro(1-phenylethyl)naphthalene, diisopropylnaphthalene, monoisopropylbiphenyl, phenylethylphenylethane, N-ethylcarbazole, phenylpyridines, tolylpyridines, diphenylpyridines, dipyridylbenzenes, dipyridinetoluenes, and mixtures of two or more thereof, in any proportions.
5 . The formulation as claimed in claim 1 , comprising at least 50% by weight of benzyltoluene and dibenzyltoluene, relative to the total weight of benzyltoluene+dibenzyltoluene.
6 . The formulation as claimed in claim 1 , comprising from 80% to 99.9% by weight of benzyltoluene and from 0.1% to 20% by weight of dibenzyltoluene (relative to the total weight of benzyltoluene +dibenzyltoluene).
7 . The formulation as claimed in claim 1 , in which the amount of at least one hydrocarbon having a molar mass of less than or equal to 100 g mol −1 is less than or equal to 10 ppm by weight.
8 . The formulation as claimed in claim 1 , in which said at least one hydrocarbon is selected from hydrocarbon compounds having a molar mass of less than or equal to 100 g mol −1 and comprising carbon, hydrogen and optionally one or more heteroatoms selected from the group consisting of oxygen, sulfur and nitrogen.
9 . A method of fixing hydrogen using the formulation as claimed in claim 1 , as LOHC fluid for producing hydrogen comprising an amount of less than or equal to 10 ppm by weight of a hydrocarbon having a molar mass of less than or equal to 100 g mol −1 .
10 . The method as claimed in claim 9 , for producing hydrogen that can be used in fuel cells, or in the electronics sector for producing microprocessors, semiconductors, etc.