Abstract:
The invention relates to adsorbents for removing contaminants from gas flows containing water, particularly for use in fuel cell systems, wherein the adsorbents contain oxides of elements selected from the group Cu, Fe, Zn, Ni, Co, Mn, Mg, Ba, Zr, Ce, La or combinations of said elements, at a copper oxide content of at least 30 wt %, and have pore volumes of less than 0.175 ml . g -1 for pores having a radius of less than 20 nm.
Abstract:
Chromium-free catalyst for the low-temperature conversion of carbon monoxide and water into hydrogen and carbon dioxide, which comprises a mixed oxide of at least copper oxide, zinc oxide and aluminium oxide, with the catalyst precursor being present essentially as hydrotalcite and the content of copper oxide being not more than 20% by weight.
Abstract:
The present invention provides a catalyst comprising a mixture of at least one acid-activated sheet silicate with a transition metal oxide of groups 8 and/or 9 of the Periodic Table of the Elements, and also a process for preparing polytetrahydrofuran, polytetrahydrofuran copolymers, diesters or monoesters of these polymers, characterized in that tetrahydrofuran is polymerized in the presence of at least one telogen and/or comonomers over such a catalyst.
Abstract:
The present invention provides a catalyst comprising a mixture of at least one acid-activated sheet silicate with a transition metal oxide of groups 8 and/or 9 of the Periodic Table of the Elements, and also a process for preparing polytetrahydrofuran, polytetrahydrofuran copolymers, diesters or monoesters of these polymers, characterized in that tetrahydrofuran is polymerized in the presence of at least one telogen and/or comonomers over such a catalyst.
Abstract:
A process for the activation of a copper, zinc and zirconium oxide-comprising adsorption composition for the adsorptive removal of carbon monoxide from substance streams comprising carbon monoxide and at least one olefin wherein: (i) in a first activation step, an activation gas mixture comprising the olefin and an inert gas is passed through the adsorption composition, and (ii) in a second activation step, the adsorption composition is heated to a temperature in the range from 180 to 300 °C and an inert gas is passed through it, wherein the step (i) and (ii) can each be performed several times.
Abstract:
A process for the activation of a copper, zinc and zirconium oxide-comprising adsorption composition for the adsorptive removal of carbon monoxide from substance streams comprising carbon monoxide and at least one olefin wherein: (i) in a first activation step, an activation gas mixture comprising the olefin and an inert gas is passed through the adsorption composition, and (ii) in a second activation step, the adsorption composition is heated to a temperature in the range from 180 to 300 °C and an inert gas is passed through it, wherein the step (i) and (ii) can each be performed several times.
Abstract:
A highly active water gas shift catalyst, preparation process and use thereof are provided. The catalyst comprises at least one noble metal in an amount of from 0.001 to 1.10% by weight, based on the total weight of the catalyst, at least one alkali metal and/or alkaline earth metal and at least one dopant selected from the group of Fe, Cr, Cu, Zn and mixtures thereof on a support material. The catalyst can be used to convert carbon monoxide and water into carbon dioxide and hydrogen in a wide temperature range.