一种以自热重整后的气态烃为原料的等压制氨工艺

• Format: Patent
• Language: Chinese
• Published: 28.05.2019
• Subjects: AMMONIA; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; COMPOUNDS THEREOF; CYANOGEN; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; INORGANIC CHEMISTRY; METALLURGY; NON-METALLIC ELEMENTS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

本发明提供了一种以自热重整后的气态烃为原料的等压制氨工艺，该工艺通过使气态烃在氧化剂和蒸汽存在下发生自热重整转化，由此可省略一段转化炉的设置，并且制得的合成气压力接近于氨合成压力，也省去了合成气压缩机，而后将制得的合成气依次在第一钌基催化剂和第二钌基催化剂存在的不同工艺条件下进行氨合成反应，通过先后两级反应的配合，大幅提高了氢氮的转化率及氨收率，使得出口气中的氨浓度达到20.5～22.8％，不仅收率高且波动小，具有很好的工业应用前景。 The invention provides an isobaric ammonia preparation technology taking gaseous hydrocarbon after autothermal reforming as a raw material. The technology allows gaseous hydrocarbon to generate autothermal reforming conversion in the presence of an oxidizing agent and steam, so that arrangement of a primary converter can be omitted; the pressure of prepared synthesis gas is approximate to the pressure of ammonia synthesis, so that a synthesis gas compressor is also omitted; the prepared synthesis gas is subjected to ammonia synthesis reactions under different technology conditions in the presence of a first ruthenium-base catalyst and a second ruthenium-base catalyst sequentially, so that a hydrogen-nitrogen conversion rate and an ammonia yield are greatly increased by matching of the sequenti