摘要:
Apparatus and methods utilizing cross-flow filtration under supercritical conditions for water to separate/filter a feed stream or reaction mixture, remove oxides or other solids from fluids, and/or separate ion species (e.g., ions, electrolytes, or salts). Cross-flow filtration may be utilized in combination with wet oxidation of waste and wastewaters to remove organic and inorganic materials.
摘要:
A system for effective utilization of reaction heat and in situ separation of solid and gaseous products in wet oxidation of waste and wastewater. This invention does not require special preheaters for preheating feed streams, therefore reducing the possibility of scale and char formation in the heat exchange zone. The cold feed stream is introduced into the reactor with part of the effluent which has been recycled through a high temperature pumping means to form a hot, near critical oxidant-containing mixture. The cold feed is directly heated up by the oxidant-containing mixture. The reaction mixture is separated by in situ crossflow filtration elements, including sintered material. Catalyzed reactions and sintered material gas separation are also described.
摘要:
A method of producing an off-gas with a selected CO/H.sub.2 ratio of from about 0.1 to about 8 and a CO/CO.sub.2 ratio of at least about 0.1 by hydrothermal processing is provided. The method comprises the step of contacting a reactant capable of producing CO and H.sub.2 under hydrothermal conditions at a temperature of at least about 374.degree. C. and a pressure of at least about 22.1 MPa in the presence of water and with an amount of an additive effective to produce the selected CO/H.sub.2 ratio. The contacting is for a time sufficient to produce off-gas having the selected CO/H.sub.2 ratio and having a CO/CO.sub.2 ratio of at least about 0.1. Presence of the additive may enhance or may reduce the ratio of carbon monoxide to hydrogen in the off-gas. The additive may be an acid, a base, a salt, an oxide, or an oxidant. The off-gas having a selected CO/H.sub.2 ratio may be used for synthesis of organic compounds.
摘要翻译:提供了通过水热处理产生具有约0.1至约8的选定CO / H 2比和至少约0.1的CO / CO 2比的废气的方法。 该方法包括在水和在一定量的添加剂的存在下,在至少约374℃的温度和至少约22.1MPa的压力的水热条件下使能够产生CO和H 2的反应物接触的步骤 有效地产生选定的CO / H 2比。 接触时间足以产生具有选择的CO / H 2比且CO / CO 2比至少约0.1的废气。 添加剂的存在可以增强或可以减少废气中的一氧化碳与氢的比例。 添加剂可以是酸,碱,盐,氧化物或氧化剂。 具有选择的CO / H 2比的废气可用于合成有机化合物。
摘要:
Production of alkanes from an alkyl bound to a heteroatom under controlled hydrothermal conditions at supercritical or near critical water conditions including the use of an additive. The method reduces the extent of oxidation, generates useful and recoverable products, alters product distributions, promotes product yield, and enhances reaction rates. Additives alter product distributions and neutralize or consume mineral acids.
摘要:
An organic or inorganic feed compound can be treated in two or more zones to progressively oxidize the compound. The first zone oxidizes the compound to an intermediate product which includes a first intermediate compound which is intermediate the feed compound and end product. The second zone further oxidizes the intermediate product to an end product or a second intermediate compound which is intermediate the first intermediate compound and an end product. One or both zones may operate catalytically and/or at supercritical conditions for water to oxidize the compounds.
摘要:
Sodium and borate ions are separated in supercritical water by addition of dissolved CO.sub.2 to cause precipitation of carbonates and the formation of boric acid. Carbonates and boric acid are then recovered as separate products.
摘要:
A system for effective utilization of reaction heat and in situ separation of solid and gaseous products in wet oxidation of waste and wastewater. This invention does not require special preheaters for preheating feed streams, therefore reducing the possibility of scale and char formation in the heat exchange zone. The cold feed stream is introduced into the reactor with part of the effluent which has been recycled through a high temperature pumping means to form a hot, near critical oxidant-containing mixture. The cold feed is directly heated up by the oxidant-containing mixture. The reaction mixture is separated by in situ crossflow filtration elements, including sintered material. Catalyzed reactions and sintered material gas separation are also described.