摘要:
The invention relates to a method for producing acetylene and synthesis gas by partially oxidizing hydrocarbons by means of oxygen. In said method, a first input flow containing one or more hydrocarbons and a second input flow containing oxygen are preheated separately from each other, mixed at a ratio of the mass flow rate of the second input flow to the mass flow rate of the first input flow corresponding to an oxygen number λ less than or equal to 0.31, and fed via a burner block to a combustion chamber. The hydrocarbons are partially oxidized in the combustion chamber. A cracked gas is thereby obtained, which is quenched to 80 to 90 degrees Celsius downstream of the combustion chamber by injecting an aqueous quenching medium. A process water flow I liq and a product gas flow I g are obtained. The product gas flow is cooled down in a cooling column by means of direct heat exchange with cooling water in order to obtain a process water flow II liq as a bottom flow, a product gas flow II g as a top flow, and a side flow, which is depleted of soot in an electric filter. A process water flow III liq arises in the electric filter. The process water flows I liq , II liq , and III liq are merged and conducted via soot grooves having surface particle separators in order to obtain a merged process water flow IV liq . The method is characterized in that the merged process water flow IV liq is subjected to cleaning by means of partial evaporation in a single-stage flash tank, the merged process water flow IV liq being evaporated to a fraction of 0.01 wt% to 10 wt%, in relation to the total weight thereof, in order to obtain a cleaned process water flow V liq , which is recycled into the method.
摘要:
Method for partial oxidation of hydrocarbons in a reactor in which the reactor is fed by a stream containing the hydrocarbon and by a stream containing the oxygen, wherein the two streams fed to the reactor are fed separately through one or more spatially separate lines in the reactor, wherein these lines comprise internal turbulence generators, by means of which a highly turbulent flow field is created by the pre-determined redirection of the flow direction downstream of said turbulence generators and the streams are then mixed in a mixing zone after exiting the lines and then reacted in a reaction zone.
摘要:
The invention relates to a continuous method for producing acetylenes and syngas by partially oxidizing hydrocarbons with oxygen. A first feed stream (1) containing one or more hydrocarbons and a second feed stream (2) containing oxygen are - mixed in a ratio of the mass flows of the second feed stream (2) to the first feed stream (1) corresponding to an oxygen number of less than or equal to 0.31, said streams being heated separately from each other, - and fed to a combustion chamber (FR) via a burner block (BR), the partial oxidation of the hydrocarbons being carried out in said combustion chamber, - thereby obtaining a first cracked gas stream I g . The invention is characterized in that - the first cracked gas stream I g is precooled to a temperature ranging from 100 to 1000 °C in a prequench region (H), thereby obtaining a second cracked gas stream II g , - 50 to 90% of the solids contained in the second cracked gas stream II g are separated therefrom in a solid-gas separating device (A), thereby obtaining a solid stream I f and a third cracked gas stream III g , - the third cracked gas stream III g is cooled to 80 to 90 °C by injecting water in a total quench region (B), thereby obtaining a fourth cracked gas stream IV g and a first process water stream I liq , - the fourth cracked gas stream IV g undergoes a fine separation of solids in one or more scrubbing devices (C, D), thereby obtaining one or more process water streams II liq , III liq and a product gas stream VI g , - the process water streams I liq , II liq , III liq are merged into a combined process water stream IV liq , - the combined process water stream IV liq is partly recirculated, as stream V liq , into the total quench region (B) and otherwise undergoes a cleaning process, as stream VI liq , by means of a partial evaporation process, thereby obtaining a cleaned process water stream VII liq , - which is cooled by a recooling device (F), partially recycled, as stream VIII liq , into the method, and otherwise discharged, as stream IX liq .
摘要:
The invention relates to a method for producing catalyst support particles containing zirconium dioxide and optionally silicon oxide, comprising the following steps: (i) a solution containing precursor compounds of zircon dioxide and optionally silicon dioxide is prepared; (ii) the solution(s) is/are converted into an aerosol; (iii) the aerosol is introduced into a pyrolysis zone that is directly or indirectly heated; (iv) pyrolysis is carried out; (v) the catalyst particles that have been formed are separated from the pyrolysis gas.
摘要:
The invention relates to a method for producing catalyst particles comprising platinum and tin, in addition to at least one further element selected from lanthanum and caesium, on zirconium dioxide as a support, comprising the following steps: one or multiple solutions containing precursor compounds of Pt, Sn and at least one other element of La or Cs and ZrO2 is/are prepared; the solution(s) is/are converted into an aerosol; the aerosol is introduced into a pyrolysis zone that is directly or indirectly heated; the pyrolysis is carried out and the particles that have formed are separated from the pyrolysis gas. Suitable precursor compounds comprise zirconium(IV) acetyl acetonate, lanthanum(II) acetyl acetonate and caesium acetate, hexamethyl disiloxane, tin-2-ethyl hexanoate, platinum-acetyl acetonate, zirconium(IV) propylate in n-propanol and lanthanum(II)-acetyl acetonate. The invention also relates to catalyst particles obtained using the method according to the invention and to the use of said particles as dehydrogenation catalysts.
摘要:
A process for preparing acetylene and synthesis gas by partial oxidation of hydrocarbons with oxygen, by first separately preheating the hydrocarbon gas and oxygen gas, and then reacting the gases and cooling the products rapidly. The reactor wall is blanketed with a purge gas stream, introduced through a plurality of feed lines. These feed lines deliver purge gas in a vector direction within a 10° angle of the main flow direction of the reactive gas stream. The purge gas is delivered at multiple stages relative to the main flow direction of the reactive gas stream, and the free cross section of the firing space available to the reactive gas stream, at the height of the feed lines of the purge gas stream, is approximately constant.