Ammonia synthesis with co2-neutral hydrogen

An ammonia synthesis apparatus for producing hydrogen and for converting the hydrogen into ammonia, wherein the ammonia synthesis apparatus comprises:

• a converter for converting nitrogen and hydrogen into ammonia;
• a separation apparatus for separating the ammonia from the gas stream, wherein the ammonia synthesis apparatus has a reactant inlet and a product outlet, wherein the separation apparatus has a gas mixture inlet and a reactant gas outlet, wherein the product outlet of the ammonia synthesis apparatus is connected to the gas mixture inlet of the separation apparatus, wherein the reactant gas outlet of the separation apparatus is connected to the reactant inlet of the ammonia synthesis apparatus, wherein the product outlet of the ammonia synthesis apparatus is connected to the gas mixture inlet of the separation apparatus via a first heat exchanger;
• and
• a pyrolysis reactor for conversion of hydrocarbon into carbon and hydrogen, wherein the pyrolysis reactor has a hydrocarbon inlet and a hydrogen outlet, wherein the hydrogen outlet of the pyrolysis reactor is connected to the reactant inlet of the ammonia synthesis apparatus, wherein the reactant gas outlet of the separation apparatus is connected to the hydrocarbon inlet of the pyrolysis reactor.

A process for synthesis of ammonia from a hydrocarbon, wherein the process comprises the steps of:

• a) supplying a hydrocarbon into a pyrolysis reactor;
• b) pyrolyzing the hydrocarbon to afford carbon and hydrogen in the pyrolysis reactor;
• c) passing the hydrogen from the pyrolysis reactor into a converter;
• d) supplying nitrogen to the converter;
• e) converting the hydrogen and the nitrogen into ammonia in the converter;
• f) cooling the ammonia synthesis product gas stream in a first heat exchanger;
• g) separating the ammonia from the ammonia synthesis product gas stream in a separation apparatus and obtaining an ammonia synthesis reactant gas stream;
• h) dividing the ammonia synthesis reactant gas stream into a first substream and a second substream;
• i) passing the first substream into the converter;
• and
• j) passing the second substream into the pyrolysis reactor.