Abstract:
A particulate, heterogeneous solid CO 2 absorbent composition, comprising decomposition products of Ca 3 Al 2 O 6 after having been heated to a temperature between 500 °C and 925 °C in the presence of H 2 O and CO 2 for a period of time sufficient to allow the Ca 3 Al 2 O 6 to react and form the particulate, heterogeneous absorbent composition which exhibits a higher concentration of aluminium than calcium in the particle core but a higher concentration of calcium than aluminium at the particle surface. The invention also comprises a method for preparing the particulate, heterogeneous product as well as a method for utilizing the composition for separating CO 2 from a process gas.
Abstract translation:一种颗粒状非均相固体CO 2吸收剂组合物,其包含在H 2 O和CO 2存在下加热至500℃至925℃之间的温度下Ca 3 Al 2 O 6的分解产物足够长的时间,以使Ca 3 Al 2 O 6反应并形成 颗粒状非均相吸收剂组合物在颗粒芯中表现出比钙更高的铝浓度,但在颗粒表面具有比铝更高的钙浓度。 本发明还包括一种制备颗粒状非均质产品的方法以及一种利用该组合物从工艺气体中分离CO 2的方法。
Abstract:
The present invention generally relates to a process for making a metal oxide composition. The present invention also relates to a process for making a coated metal oxide substrate.
Abstract:
A method of adsorbing mercury includes the use of silver nanodots formed on chabazite as a sorbent. The silver nanodots may be formed on chabazite by ion-exchange followed by activation.
Abstract:
A method of making a porous material is provided. The method includes: preparing a mixture including a sugar, a polymer, and at least one soluble metal source, in water; heating the mixture to obtain a gelled material; thermally curing the gelled material to obtain a cured material; and annealing at least a part of the cured material to obtain a porous material that includes metal nanoparticles, where the metal nanoparticles include at least one metal from the at least one soluble metal source. The porous material can include: sheets of multilayer graphene layers; metal nanoparticles dispersed among the sheets and encapsulated by layers of graphene; and macropores, mesopores or micropores, or any combination thereof, throughout the porous material and on its surface. Methods of using the porous material to separate contaminants from water are also provided.
Abstract:
Изобретения относятся к области очистки окружающей среды, в частности к сорбирующему материалу для сбора нефти и нефтепродуктов и способу его получения. Способ включает пропитку холста из базальтовых волокон гидрофобизирующей жидкостью и последующую сушку, причем, в качестве базальтовых волокон холста используют волокна с диаметром 0,2-2 мкм и плотностью не более 20-25 кг/м 3 , перед пропиткой холст предварительно распушают сжатым воздухом до плотности 12-15 кг/м 3 , пропитку гидрофобизирующей жидкостью производят путем введения сжатым воздухом в предварительно распушенные базальтовые волокна холста гидрофобизирующей жидкости в виде аэрозольных частиц, а последующую сушку пропитанного холста проводят сжатым воздухом, преимущественно при температуре 65°C-75°C. При реализации способа обеспечивается упрощение и расширение области применения. Материал, изготовленный в соответствии со способом, характеризуется тем, что объем гидрофобизирующей добавки выбирают из достижения величины плотности готового материала или в интервале от 10 до 70 кг/м 3 , или в интервале от 10 до 15 кг/м 3 , или в интервале от 30 до 70 кг/м 3 . Это улучшает сорбирующие свойства материала.
Abstract translation:本发明涉及清洁环境的领域,更具体地涉及用于收集石油和石油产品的吸附剂材料及其生产方法。 该方法包括用疏水化液体使玄武岩纤维帆布饱和并随后干燥,其中帆布的玄武岩纤维的直径为0.2-2微米,密度不超过20-25kg / m 3; 在饱和之前,帆布首先使用压缩空气起毛,直到达到12-15kg / m3的密度; 使用疏水化液体的饱和度通过将疏水化液体通过压缩空气以气溶胶颗粒的形式引入帆布的预起毛玄武岩纤维中来进行; 并且随后使用压缩空气进行饱和帆布的干燥,优选在65℃-75℃的温度下进行。 结果是具有更广泛应用领域的简化方法。 根据该方法制造的材料的特征在于,选择疏水添加剂的体积以实现成品材料的密度在10-70kg / m 3范围内,或在10-15的范围内 kg / m3,或30-70kg / m3的范围内。 这提高了材料的吸附剂特性。
Abstract:
A powdered Iron-Selenide-Oxide sorbent composition, a method of using the sorbent, and a method for producing the sorbent is disclosed for removing mercury vapor from a gaseous stream. The exact ratios of Fe to Se are varied. The method for producing the sorbent comprises the steps of: preparing a base ferrous or ferric oxide (FeOx) media, conditioning the FeOx media with a slurry of ferrous selenite (FeSeO 3 )/ ferrous selenate (FeSeO 4 ), reducing the FeSeO 3 /FeSeO 4 mixture by an elemental iron (Fe 0 ) powder to incorporate selenide into the slurry, and dewatering and oxidizing the slurry. The sorbent can be used alone (or in combination with a powdered activated carbon material or an inert powdered material) by direct injection into the Hg-containing gas stream, by coating of a filter fabric used in bag house with the sorbent, or by using the sorbent in a packed bed gas stream filtration system.
Abstract:
Methods of sulfurizing metal containing particles in the absence of hydrogen are described. One method includes contacting a bed of metal containing particles with a gaseous stream comprising hydrogen sulfide and inert gas under reaction conditions sufficient to produce sulfided metal containing particles. The gaseous stream is introduced into a vertical reactor at an inlet positioned at the bottom portion of the reactor and any unreacted hydrogen sulfide and inert gas is removed at an outlet positioned above the inlet. The sulfided metal containing particles can be removed from the reactor and stored.
Abstract:
The invention relates to a method for increasing the absorbency of a material containing alkaline-earth carbonate and alkaline-earth hydroxide with regard to sulfur oxides and/or other pollutants, in particular in flue gas, wherein the material containing alkaline-earth carbonate and alkaline-earth hydroxide is activated by heating said material to approximately 250°C to approximately 750°C for a time period of 1 minute to 12 hours.