摘要:
The subject of the invention is a process for the synthesis of hydrocarbons based on a synthesis gas type feedstock in which said synthesis gas is brought into contact with a catalyst in a reactor under Fischer-Tropsch synthesis conditions and in which the partial pressure of water is controlled in order to keep it below a critical value ppH2O-limit defined by the formula: ppH2Olimit=exp(−7751/dp·T)·Ps(T) where T is the reaction temperature in K, dp is the average diameter of the catalyst pores in nm, determined by nitrogen adsorption-desorption (BJH method), Ps(T) is the saturating water vapour pressure at temperature T, in bar.
摘要:
A process for synthesising hydrocarbons from synthesis gas in the presence of a catalyst essentially constituted by a Raney metal alloy dispersed in a liquid phase is described in which the catalyst comprises at least 60% by weight of at least one metal selected from metals from groups 8, 9 and 10, and optionally at least one additional element selected from alkali metals and metals from groups 4, 5, 6, 7, 8, 9, 10 and 11.
摘要:
The invention relates to a catalyst which can be applied to a method for converting synthesis gas, said catalyst comprising: a) a support made of a solid solution containing at least one first aluminate element with a mixed spinel structure of formula MxM′(1-X)AI2O4/AI203.SiO2, x ranging from 0 to 1 being excluded, or a simple spinel structure of formula MAI2O4/AI2O3 SiO2, wherein the support is calcinated in an at least partially oxidizing atmosphere at a temperature ranging from 850° C. to 900° C., b) an active phase which is deposited on the support which contains one or several metals of group VIII, selected from amongst cobalt, nickel, ruthenium or iron. The catalyst is used in a fixed bed or in a suspension in a triphasic reactor for the synthesis of hydrocarbons from a CO, H2 mixture.
摘要翻译:本发明涉及可用于转化合成气的方法的催化剂,所述催化剂包括:a)由含有至少一种第一铝酸盐元素与具有式MxM'(1- X)Al 2 O 4 / Al 2 O 3·Si 2 O 2,排除0至1的x,或式MAI 2 O 4 / Al 2 O 3 SiO 2的简单尖晶石结构,其中载体在至少部分氧化气氛中在850℃的温度下煅烧。 至900℃,b)沉积在载体上的活性相,其含有一种或几种选自钴,镍,钌或铁的VIII族金属。 该催化剂用于固定床或三相反应器中用于从CO,H 2混合物合成烃的悬浮液中。
摘要:
A process for the production of phenylalkanes comprising a reaction for alkylation of at least one aromatic compound by at least one hydrocarbon fraction that is directly obtained from the Fischer-Tropsch process comprising linear olefins that have 9 to 16 carbon atoms per molecule and oxygenated compounds is described. Said alkylation reaction is carried out in a catalytic reactor that contains at least one reaction zone that comprises at least one acidic solid catalyst, and said hydrocarbon fraction does not undergo any purification treatment prior to its introduction into said reaction zone.
摘要:
The invention concerns a method for optimizing the operation of a reaction section for hydrocarbon synthesis starting from a feed comprising synthesis gas, operated in the presence of a catalyst comprising cobalt. This method comprises the following steps: a) determining the theoretical molar ratio, PH2O:PH2, in the reaction section; b) optionally, adjusting the ratio PH2O:PH2 determined in step a) to a value strictly below 1; c) determining the new value for the theoretical ratio PH2O:PH2 in the reaction section; and repeating steps a) to c) until the ratio of the partial pressures of water and hydrogen, PH2O:PH2, has a value strictly less than 1.1.
摘要:
The invention concerns a method for optimizing the operation of a reaction section for hydrocarbon synthesis starting from a feed comprising synthesis gas, operated in the presence of a catalyst comprising cobalt. This method comprises the following steps: a) determining the theoretical molar ratio, PH2O:PH2, in the reaction section; b) optionally, adjusting the ratio PH2O:PH2 determined in step a) to a value strictly below 1; c) determining the new value for the theoretical ratio PH2O:PH2 in the reaction section; and repeating steps a) to c) until the ratio of the partial pressures of water and hydrogen, PH2O:PH2, has a value strictly less than 1.1.
摘要:
The invention concerns a method for optimizing the operation of a reaction section for hydrocarbon synthesis starting from a feed comprising synthesis gas, operated in the presence of a catalyst comprising cobalt. This method comprises the following steps: a) determining the theoretical molar ratio, PH2O:PH2, in the reaction section; b) optionally, adjusting the ratio PH2O:PH2 determined in step a) to a value strictly below 1; c) determining the new value for the theoretical ratio PH2O:PH2 in the reaction section; and repeating steps a) to c) until the ratio of the partial pressures of water and hydrogen, PH2O:PH2, has a value strictly less than 1.1.
摘要:
A process for producing a tertiary olefin by decomposing a tertiary alkyl ether comprises a) decomposing at least one ether to a product containing an alcohol and a tertiary olefin, b) fractionating at least a portion of the product from a) in a fractionation zone (C1) to obtain the tertiary olefin and the alcohol, c) purifying at least a portion of the tertiary olefin obtained from step b) wherein said portion is sent to a water washing extraction zone (L1) from which a fraction (D) containing the tertiary olefin is recovered, and d) a step in which at least a portion of the fraction (D) from c) is sent to a separation zone (Co) from which a liquid aqueous fraction (Le) and a liquid hydrocarbon fraction (Lc) containing the major portion of the tertiary olefin are recovered.
摘要:
A process for producing a tertiary olefin by decomposing an ether comprises a) decomposing an ether to a product containing an alcohol and a tertiary olefin, b) purifying at least a portion of the product from a) in a water washing extraction zone (L1) to obtain an aqueous fraction (A1) containing the major portion of the alcohol and a fraction (B1) containing the major portion of the tertiary olefin, the fraction (B1) containing the tertiary olefin, water, possibly ether and light compounds and being substantially free of alcohol, and c) in which at least a portion of the fraction (B1) from b) is sent to a separation zone (Co1) from which a liquid aqueous fraction (La1) and a liquid fraction (Lb1) containing the major portion of the tertiary olefin, possibly ether and possibly light compounds, are recovered.
摘要:
A process for the production of liquid hydrocarbons by the Fischer-Tropsch process comprises a step a) for generating a synthesis gas, a step b) for Fischer-Tropsch synthesis, a step c) for condensing the gaseous effluent obtained during step b), a step d) for separating the effluent condensed during step c) to obtain a gaseous effluent enriched in carbon monoxide and hydrogen, and a step e) for recycling at least a portion of the enriched gaseous effluent obtained during step d) to the Fischer-Tropsch synthesis step b), characterized in that: 1) two molar ratio of concentrations, A1 and A2, are determined between the hydrogen and the carbon monoxide (H2/Co), A1 being the value of said ratio in the supply to the synthesis step b), and A2 being the value of said ratio in any one of the gaseous effluents obtained during steps b) to e); 2) comparing ratios A1 and A2; and 3) adjusting the concentrations of hydrogen and/or carbon monoxide in the synthesis gas to keep the difference between the two ratios A1 and A2 substantially constant.