| 摘要 |
H2 or H2/N2 mixture is produced by reacting a hydrocarbon material with water-vapour using external heating, and fractionating and/or scrubbing with liquid N2 the cracked gas to give a crude H2 or H2N2 fraction, and a fraction containing CO and CH4 which is used to heat the reaction, the reaction conditions and reactant ratios being such that the heating fraction produced is sufficient to supply all the external heat required. Specified hydrocarbon materials are light petroleum and natural gas. The cracked gas may be separated in cyclically operable regenerators to form a condensed heating fraction and a crude H2 fraction, the H2 may then be purified, e.g. by partial condensation and the impurities added to the evaporated heating fraction. The product H2 or H2/N2 mixture may be used in NH3 synthesis, in which case, an O2-free "stack gas" (gaseous combustion products of carbonaceous material), containing N2 and CO2 may be added before, during or after the reaction. CO2 may be removed before fractionating by washing with H2O or by condensing it out. |
