Process and device for producing hydrogen from organic oxygen compounds
At least one hydrogen-containing product stream ( 4 ) can be obtained from feedstocks ( 1 ) that contain organic oxygen compounds with more than one carbon atom. In the process, an intermediate product is obtained from the feedstock ( 1 ) in a first process step in a first reactor (P). The intermediate product is then reacted by steam reforming in a steam-reforming reactor (steam reformer) (D), which is heated from the outside, to obtain a synthesis gas ( 3 ) that contains hydrogen and carbon monoxide.
1 . A process for producing at least one hydrogen-containing product stream from at least one feedstock containing organic oxygen compounds with more than one carbon atom, said process comprising:
introducing a feedstock containing organic oxygen compounds with more than one carbon atom into a first reaction zone to produce an intermediate product,
subjecting said intermediate product steam reforming in a steam-reforming reactor, which can be heated from the outside, to obtain a synthesis gas containing hydrogen and carbon monoxide.
2 . A process according to claim 1 , wherein steam is fed into said first reaction zone, whereby said feedstock is reacted in the presence of steam.
3 . A process according to claim 1 , wherein said first reaction zone is in the convection zone of said steam reformer.
4 . A process according to claim 1 , wherein a pyrolysis reaction is performed in said first reaction zone, and said pyrolysis reaction is performed in a pyrolysis reactor.
5 . A process according to claim 1 , wherein a partial oxidation reaction is performed in said first reaction zone, and said partial oxidation reaction is performed in a partial oxidation reactor into which an oxidizing agent is fed.
6 . A process according to claim 1 , wherein steam is added to the intermediate product obtained from the first reaction zone before entry into the steam reformer.
7 . A process according to claim 1 , wherein an oxidizing agent is introduced into said steam reformer whereby the steam reforming is performed in the presence of said oxidizing agent.
8 . A process according to claim 1 , wherein the steam reforming is performed in the presence of a catalyst.
9 . A process according to claim 8 , wherein said catalyst comprises nickel (Ni), platinum (Pt), palladium (Pd), iron (Fe), rhodium (Rh), ruthenium (Ru), iridium (Ir) or combinations thereof.
10 . A process according to claim 8 , wherein the catalyst used in the steam reforming is also suitable for use in catalytic steam reforming of naphtha or methane.
11 . A process according to claim 1 , further comprising producing a product gas with a defined hydrogen/carbon monoxide ratio from said synthesis gas by water gas-shift reaction.
12 . A process according to claim 11 , wherein said water gas-shift reaction is performed within said steam reformer.
13 . A process according to claim 11 , wherein said water gas-shift reaction is performed in a water gas-shift reactor is downstream of said steam reformer.
14 . A process according to claim 1 , wherein said feedstock contains one or more alcohols with more than one alcohol group.
15 . A process according to claim 14 , wherein said feedstock contains glycerol.
16 . A process according to claim 1 , wherein said feedstock is obtained from biogenic raw materials.
17 . An apparatus for producing at least one hydrogen-containing product stream from at least one feedstock containing organic oxygen compounds with more than one carbon atom, said apparatus comprising:
a first reactor having an inlet for introducing a feedstock containing organic oxygen compounds with more than one carbon atom, and an outlet for discharging an intermediate product, and
a steam-reforming reactor, that can be heated from the outside, having an inlet in fluid communication with said outlet of said first reactor and an outlet for discharging a synthesis gas containing hydrogen and carbon monoxide, wherein intermediate product from said first reactor can be reacted in said steam-reforming reactor to produce said synthesis gas containing hydrogen and carbon monoxide.
18 . An apparatus according to claim 17 , wherein said first reactor is positioned within a convection zone of the steam reformer.
19 . An apparatus according to claim 17 , wherein said first reactor is a pyrolysis reactor.
20 . An apparatus according to claim 17 , wherein the first reactor is a reactor partial oxidation reactor.
21 . An apparatus according claim 17 , wherein said steam reformer is a catalytic steam reformer.
22 . An apparatus according to claim 17 , further comprising a water gas-shift reactor for producing from the synthesis gas a product gas with a defined hydrogen/carbon monoxide ratio, said water gas-shift reactor having an inlet in fluid communication with said outlet of said steam reformer and an outlet for discharging said product gas with a defined hydrogen/carbon monoxide ratio, wherein said water gas-shift reactor is positioned downstream of said stream reformer or is positioned within said steam reformer.