Abstract:
Masse de captation de métaux lourds, en particulier de mercure, contenus dans une charge gazeuse ou liquide, ladite masse comprenant : - une phase active sous la forme d'une phase cristalline, ladite phase active comprenant au moins un sulfure métallique à base d'un métal M choisi dans le groupe constitué par le cuivre (Cu), le chrome (Cr), le manganèse (Mn), le fer (Fe), le cobalt (Co), et le nickel (Ni); - un support amorphe comprenant un matériau à base d'aluminium.
Abstract:
Methods for a facile, template free and one-step synthesis of nanoporous carbons by using a heterocyclic aromatic organic compound as a single source precursor of both carbon and nitrogen are described. The heterocyclic aromatic organic compound contains nitrogen in pyrrolic and/or pyridinic positions and is chemically activated with NaOH, KOH or ZnCl2 at high temperatures in a solid state mixture as a synthesis protocol to promote fine micropores during carbonization. Nanoporous carbons synthesized by these methods that have superior gas sorption/storage and energy storage properties are also described. The nanoporous carbons are useful as carbon sequestration agents and supercapacitors.
Abstract:
A process is disclosed for the removal of hydrogen sulfide (H 2 S) from natural. This process provides for passing a natural gas feedstream comprising H 2 S though a regenerable adsorbent media which adsorbs H 2 S to provide an H 2 S-lean natural gas product and H 2 S. The regenerable adsorbent media of the present invention is a tertiary amine functionalized cross-linked macroporous polymeric adsorbent media.
Abstract:
Amorphous aluminosilicates are disclosed, and these amorphous aluminosilicates are characterized by a unique combination of high surface area, low oil absorption, and a significant fraction of the total pore volume resulting from micropores. These amorphous aluminosilicates can be used in various paint and coating applications, with the resultant dried or solid film capable of removing VOC's from the surrounding air.
Abstract:
A method for separating at least one hydrocarbon from a feed containing a mixture of at least one hydrocarbon and nitrogen, comprising contacting the feed with an adsorbent comprising a porous support wherein the porous support comprises exchangeable cations and at least a portion of the exchangeable cations are organic cations.
Abstract:
La présente invention concerne un adsorbant zéolithique comprenant au moins une zéolithe de structure faujasite (FAU) de type LSX et comprenant du baryum et/ou du potassium, dans lequel la surface externe dudit adsorbant zéolithique, mesurée par adsorption d'azote, est comprise entre 20 m 2 ∙ g -1 et 100 m 2 ∙ g -1 bornes incluses. La présente invention concerne également l'utilisation d'un tel adsorbant zéolithique comme agent d'adsorption, ainsi que le procédé de séparation de paraxylène à partir de coupes d'isomères aromatiques à 8 atomes de carbone.
Abstract:
In some embodiments, the present disclosure pertains to methods of capturing C0 2 from an environment by associating the environment (e.g., a pressurized environment) with a porous carbon material that comprises a plurality of pores and a plurality of nucleophilic moieties. In some embodiments, the associating results in sorption of C0 2 to the porous carbon materials. In some embodiments, the sorption of C0 2 to the porous carbon materials occurs selectively over hydrocarbons in the environment. In some embodiments, the methods of the present disclosure also include a step of releasing captured C0 2 from porous carbon materials. In some embodiments, the releasing occurs without any heating steps by decreasing environmental pressure. In some embodiments, the methods of the present disclosure also include a step of disposing released C0 2 and reusing porous carbon materials. Additional embodiments of the present disclosure pertain to porous carbon materials that are used for C0 2 capture.
Abstract:
It is described a method for controlling the emission of polluting substances in a gaseous effluent produced by a combustion process comprising at least the step of putting said gaseous effluent, at a temperature within the range of 800°C - 1400°C, in contact with a sorbent composition in powder form comprising at least calcium hydroxide (Ca(OH)2), magnesium hydroxide ((MgOH)2) and magnesium oxide (MgO), said sorbent having a specific surface area (BET) greater than 20 m2 /g. A sorbent composition in powder form, said sorbent thermally activated and a process for the preparation of said sorbent composition are also described.
Abstract translation:描述了一种用于控制由燃烧过程产生的气态流出物中的污染物质的排放的方法,该方法至少包括将所述气态流出物在800℃至1400℃的温度范围内与 包含至少包含氢氧化钙(Ca(OH)2),氢氧化镁((MgOH)2)和氧化镁(MgO))的粉末形式的吸附剂组合物,所述吸附剂的比表面积(BET)大于20m 2 / g 。 还描述了粉末形式的吸附剂组合物,所述吸附剂热活化和制备所述吸附剂组合物的方法。
Abstract:
The present invention relates to a process for purifying a gas stream comprising hydrogen sulfide or mercaptans, or mixtures thereof. The gas stream can be a sour natural gas stream, a landfill gas or an industrial gas stream. The process comprises contacting the gas stream at effective absorption conditions including an absorption temperature less than about 300oC with a solid absorbent effective to absorb the hydrogen sulfide, or mercaptans or mixtures thereof to provide a purified gas stream. Method is useful for treating gas streams having up to 90 vol-% hydrogen sulfide, or treating highly pure hydrogen streams. The invention is useful as a guard bed for fuel cells and sensitive laboratory instruments. The invention can also be employed to treat steam reformer product hydrogen streams without the need for further compression of the product hydrogen streams.