摘要:
On décrit un procédé de production d'une coupe BTX à partir de biomasse comprenant au moins une étape de pyrolyse catalytique de ladite biomasse dans un réacteur en lit fluidisé dans lequel un flux comprenant au moins un composé oxygéné choisi parmi les alcools ayant 2 à 12 atomes de carbones, les acides alcools ayant 2 à 12 atomes de carbone, les diols ayant 2 à 12 atomes de carbones, les acides carboxyliques ayant 2 à 12 atomes de carbones, les éthers ayant 2 à 12 atomes de carbones, les aldéhydes ayant 2 à 12 atomes de carbones, les esters ayant 2 à 12 atomes de carbones, les cétones ayant 3 à 12 atomes de carbone et le glycérol seuls ou en mélange, est introduit dans le réacteur de pyrolyse catalytique, la proportion en poids dudit flux comprenant au moins un composé oxygéné introduite dans l'étape de pyrolyse catalytique représentant 0,01 à 30% en poids de la masse de biomasse introduite dans ledit procédé.
摘要:
A process is described for reducing the level of benzene in a refinery gasoline feed containing benzene and at least one C 5+ olefin, in which the refinery gasoline feed is contacted with a first alkylation catalyst under conditions effective to react at least part of the C 5+ olefin and benzene in the refinery gasoline feed and produce a first alkylation effluent. The first alkylation effluent is separated into at least (i) a first fraction rich in benzene, (ii) a second fraction rich in C 7 to C 12 hydrocarbons and (iii) a third fraction rich in C 13+ hydrocarbons. At least part of the first fraction is contacted with an alkylating agent comprising one or more C 2 to C 4 olefins in the presence of a second alkylation catalyst under conditions effective to produce a second alkylation effluent which has reduced benzene content as compared with the first fraction.
摘要:
The invention relates to a reactive filter, that is a selective catalytic reduction filter or an oxidative reaction filter, comprising a porous substrate comprising internal pores having their inner surface, totally or partially, directly coated with a catalytic zeolite material resulting from an in situ hydrothermal synthesis. The invention also relates to a process for preparing such a reactive filter and the use thereof in an engine exhaust depolluting system.
摘要:
The present invention relates to a process for improving stability of zeolite catalyst to use in cumene production by alkylation of benzene with isopropyl alcohol comprising contacting zeolite catalyst with silane compound in a certain condition. This results in the zeolite catalyst which is stable to water which is by-product of the reaction, providing longer ability to catalyze alkylation reaction.
摘要:
The present disclosure relates to a process for preparing a catalyst. The process comprises coating zeolite gel over the alumina support to obtain a chloride free zeolite gel coated alumina support, crystallizing the chloride free zeolite gel coated alumina support, washing, drying and calcining the crystallized zeolite coated alumina support to obtain a calcined crystallized chloride free zeolite coated alumina support, treating the calcined crystallized chloride free zeolite coated alumina support with ammonium nitrate to obtain sodium free support, washing, drying, and calcining the support to obtain a calcined chloride free zeolite coated alumina support, immersing the calcined chloride free zeolite coated alumina support in an active metal and a promoter metal solution mixture followed by stirring to obtain a metal coated chloride free zeolite coated alumina support, and drying and calcining the metal coated chloride free zeolite coated alumina support to obtain the catalyst.
摘要:
To be able to produce an SCR catalyst (2), in particular one having a zeolite fraction (Z) as catalytically active fraction, in a reliable process and at the same time achieve good catalytic activity of the catalyst (2), an inorganic binder fraction (B) which is catalytically inactive in the starting state and has been treated to develop catalytic activity is mixed into a catalyst composition (4). The inorganic binder component for the binder fraction (B) is, in the starting state, preferably porous particles (10), in particular diatomaceous earth, which display mesoporosity. To effect catalytic activation, the individual particles (10) are either coated with a catalytically active layer (12) or transformed into a catalytically active zeolite (14) with maintenance of the mesoporosity.