VESSEL FOR THE STORAGE OF GAS
A vessel for the storage and transportation of gasses. The vessel is particularly adapted for the storage and transportation of compressed gasses in vehicles.
1 . A vessel comprising at least one barrier layer, layer (BL), which comprises at least one thermoplastic polymer, thermoplastic polymer (TP), which is characterized by:
a glass transition temperature of at least 65° C.;
a melting temperature of at most 320° C.;
an elongation at break at −40° C. of at least 2.5% when measured according to ISO 527-2 using test pieces according to ISO 1BA at a testing speed of 5 mm/min; and
a hydrogen permeation coefficient at 85° C. of at most 500 Ncm 3 ·mm/m 2 ·d·bar.
2 . The vessel of claim 1 , wherein the thermoplastic polymer (TP) has a glass transition temperature greater than 80° C. and not exceeding 180° C.
3 . The vessel of claim 1 , wherein the thermoplastic polymer (TP) has at least one of the following: a melting temperature from 200° C. to 315° C.; an elongation at break at −40° C. of at least 3.0%; a hydrogen permeation coefficient at 85° C. from 1 to 400 Ncm 3 ·mm/m 2 ·d·bar.
4 . The vessel of claim 1 , wherein the thermoplastic polymer (TP) is selected from the group consisting of poly(arylene sulfide) polymers and semi-aromatic polyamides.
5 . The vessel of claim 1 , wherein the thermoplastic polymer (TP) is a semi-aromatic polyamide selected from the group consisting of the semi-aromatic polyamides comprising recurring units of formula XT, wherein T is terephthalic acid and X represents units deriving from a linear or branched, aliphatic or cyclo-aliphatic diamine having x carbon atoms, wherein x is selected from 6, 7, 8, 10, 11, 12, 13, 14, 15, 16.
6 . The vessel of claim 1 , wherein the thermoplastic polymer (TP) is selected from PA 6T/66 and PA 6T/6I/66.
7 . The vessel of claim 1 , wherein the thermoplastic polymer (TP) is poly (phenylene sulfide).
8 . The vessel of claim 1 , wherein the Layer (BL) comprises thermoplastic polymer (TP) and from 1 wt % to 25 wt % of the at least one impact modifier with respect to the total weight of the Layer (BL).
9 . The vessel of claim 1 , comprising at least one layer (BL) and at least one composite layer, layer (CL), in contact with the at least one layer (BL) wherein Layer (CL) comprises continuous reinforcing fibers and a thermoplastic or thermoset polymer matrix.
10 . The vessel of claim 9 , wherein the continuous reinforcing fibers are selected from the group consisting of glass fiber, carbon fiber, aramid fiber, and ceramic fiber.
11 . The vessel of claim 1 , wherein Layer (BL) represents the internal layer of the vessel and Layer (CL) represents the external layer of the vessel.
12 . The vessel of claim 1 , wherein the vessel is in the shape of a hollow body which has one or more of the following:
a diameter of 10.0 cm to 1.0 m;
a length of 50.0 cm to 10.0 m; and
an internal volume of 3.5 dm 3 to 5.0 m 3 .
13 . A compressed gas, wherein the compressed gas is contained in the vessel of claim 1 , and wherein the compressed gas is in contact with Layer (BL).
14 . The compressed gas of claim 13 , wherein the compressed gas is selected from the group consisting of hydrogen, oxygen, nitrogen, argon, helium, methane, propane, compressed natural gas, CO 2 , ammonia.
15 . A vehicle comprising the vessel of claim 1 .
16 . A method, comprising storing or transporting a compressed gas with the vessel of claim 1 to contain the compressed gas.
17 . The vessel of claim 10 , wherein the continuous reinforcing fibers in an amount of 20% to 75% with respect to the total volume of Layer (CL).
18 . A vehicle comprising the compressed gas of claim 13 .