41results about How to "High chlorine capacity" patented technology

The invention relates to a dechlorinating agent used for removing HCl from a gas by using a dry method and a preparation method thereof. The dechlorinating agent is prepared from Na2CO3, CaCO3, CaO and MaO as active constituents, crosslinked bentonite as a porous auxiliary agent, and methyl cellulose as a foaming agent and an auxiliary extrusion agent through extrusion forming, drying and roasting. The cross-linked bentonite is prepared by exchanging large-size poly aluminum cation with small-size simple cation, so that the crosslinked bentonite has great porosity factor and large specific surface. The specific surface and the pore volume of the crosslinked bentonite are larger than those of non-crosslinked bentonite. By using the crosslinked bentonite as the porous auxiliary agent, the specific surface of the dechlorinating agent is enlarged, and the dechlorinating activity and the chlorosity of the dechlorinating agent are increased. The dechlorinating agent prepared by using the crosslinked bentonite has a pore volume of 0.3-0.4 mL/g, a specific surface of 70-90 m<2>/g and a crushing strength of 60-80 N/cm, not only has lower price than pseudo-boehmite and a molecular sieve, but also has simple preparation process, high dechlorinating activity and great low-temperature penetration chlorosity.

The invention discloses a dechlorination agent and a preparation method thereof. The dechlorination agent is prepared from the following materials: 15-70wt% of carrier, 15-60wt% of active components, 1-10wt% of a pore-forming agent, 1-5wt% of an extrusion aid and 2-10wt% of a binder, wherein the carrier is at least one of weak acid salt, kaolin, pseudo-boehmite or Al2O3. The preparation method comprises the steps of mixing the materials, adding water, mixing, kneading, extruding, drying and calcining. The dechlorination agent has the advantages of high adsorption efficiency against high-concentration or low-concentration HCl at normal temperature, high dechlorination precision, high chlorine content of above 30% and a certain adsorption effect against organic chlorides; chemical reaction adsorption is adopted for adsorption against HCl, the adsorption is performed at normal temperature and normal pressure, energy consumption is not required, and the absorbed HCl and the active component in the dechlorination agent perform reaction to form a stable chemical substance to exist in an adsorber bed layer; and the dechlorination agent further has the advantages of low toxicity, high stability, easiness in filling and unloading, and no secondary pollution.

The invention provides a high-accuracy liquid-phase dechlorinating agent. The dechlorinating agent is prepared from the following components in percentage by weight: 5-20 percent of CuO, 5-10 percent of CaO, 4-8 percent of KOH and the balance of modified activated carbon, wherein the modified activated carbon is activated carbon which is subjected to acidification and oxidation. According to the dechlorinating agent, the modified activated carbon is adopted as a carrier, the open-framework structure of the activated carbon can be optimized, the pore volume and specific surface area can be increased, the content of the oxygen-containing functional group on the surface of the activated carbon can be increased, the carrier polarity can be improved, the combination degree between the carrier and the active ingredient can be enhanced, loss of the active ingredient can be reduced, hydrogen chloride which is a polar molecule can be easily and stably adsorbed on the surface of the modified activated carbon having relatively large polarity, and the dechlorinating accuracy can be improved. Furthermore, the reaction activity of the dechlorinating agent and hydrogen chloride can be increased due to the synergistic effect of three active substances in the dechlorinating agent, and maximization of chlorine capacity of the dechlorinating agent can be effectively realized, so that the chlorine capacity of the liquid dechlorinating agent can be more than or equal to 16 percent, and the dechlorinating accuracy is lower than 0.5ppm.

A high-temp dechlorinating agent is prepared from natural sepiolite as both active component and carrier, alkali-metal and alkali-earth metal compound as active component, and the inorganic or organic adhesive and pore-enlarging agent for high reaction power and stability. It can be used to remove hydrogen chloride from high-temp (650 deg.C) gas to lower than 0.5 ppm and make chlorine content reach 36%. Its advantages are high purifying power and chlorine content, simple preparing process and low cost.

The invention provides an antichlor used for purifying reforming regeneration gas. The antichlor is prepared from, by mass, 85-90wt% of a composite oxide carrier and 10-15wt% of alkaline earth metal oxide. The composite oxide carrier is a mixture formed by Al2O3, SiO2 and ZrO2 at the mass ratio of 80:(80-100):(1-3), the specific surface area of the composite oxide carrier is 310-340 m<2>/g, and the total acid content is 0.31-0.45 mmol/g. According to the antichlor, composite oxide with a specific composition is adopted as the carrier, the total acid content of the carrier can be easily controlled within a proper range so that the bonding force between metal active components and the carrier can be regulated and controlled to be moderate, accordingly, it is guaranteed that the antichlor has both high chlorine capacity and high anti-hardening capability, and thus the antichlor has broad industrialized application prospects.

The invention relates to a high-temperature dechlorination agent, which consists of 0 to 42 wt percent of CaOH, 18 to 70 wt percent of CaO, 20 to 40 wt percent of hydrotalcite, 7 to 17 wt percent of clay and 0 to 7 wt percent of adhesive. Based on the high-temperature dechlorination agent, the invention further discloses a preparation method of the high-temperature dechlorination agent. The high-temperature dechlorination agent prepared by the preparation method can be applied to a coal gasification fuel cell (MCFC) system, a coal gasification combination circulation power generation (IGCC) system and catalytic reforming regeneration gas so as to remove the HCl; furthermore, the dechlorination agent has high chlorine content and good dechlorination effect.

The invention discloses an antichlor and a preparation method thereof. The antichlor uses a composite oxide as a carrier to be loaded with oxides of alkali metal and/or alkaline earth; the composite oxide carrier contains theta aluminum oxide and calcium oxide. The composite oxide carrier is prepared by a coprecipitation method; calcium oxide is introduced into a carrier framework structure; the breakthrough chlorine content can reach 17.6 percent at the normal temperature. Through high-temperature roasting, the prepared aluminum oxide with the theta material phase structure reduces the surface hydroxyl quantity; the physical adsorption of HCl on the antichlor is reduced to the maximum degree; the phenomenon of antichlor surface acidity enhancement due to HCl physical adsorption concentration is reduced, so that the phenomenon of green oil generation through olefin polymerization due to acid catalysis is reduced; the phenomenon of organic chloride generation through reaction of olefin and HCl due to acid catalysis can be avoided. In addition, through the prepared composite oxide carrier, the intensity of the antichlor is obviously improved; the agglomeration or pulverization phenomenon under the water-containing steam work condition can be eliminated.

The invention discloses a blast furnace coal gas dechlorinating agent, a preparation method of the dechlorinating agent and a dechlorinating method thereof. The blast furnace coal gas dechlorinating agent has the active ingredients of calcium carbonate. The calcium carbonate, bonding agents and water are kneaded together; then strip extrusion is performed; the keeping in good health over the nightis performed in natural environment; then, the drying is performed at a higher temperature. The intensity is 80N/cm or more; after the single-time use, the water washing can be performed; then, multi-time dichlorination can be performed; after the water washing, the intensity is 50N/cm or more; the mass percentage of the active ingredient calcium carbonate in the dechlorinating agent is 28.2 to 90 percent; the active ingredient calcium carbonate can be heavy calcium carbonate with the granularity being 1250 to 1500 meshes, light calcium carbonate with the granularity being 1250 to 1500 meshes, calcium carbonate prepared by a nanometer stage coprecipitation method, and calcium carbonate prepared by a nanometer stage solid phase reaction method. During the dichlorination, 20 to 25 particlesof raw particle dechlorinating agents with the length being about 5mm are filled in the lower end of the contact air source; 3 to 5ml of granulation dechlorinating agents being 20 to 40 meshes are filled at the upper side. The preparation process is simple; the cost is low; the performance is excellent.

The invention belongs to the technical field of dechlorination and particularly relates to a normal-temperature gas-phase dechlorinating agent, a preparation method therefor and an application of thenormal-temperature gas-phase dechlorinating agent. The dechlorinating agent comprises a support and active ingredients, wherein the active ingredients comprise CaO and CuO, the support comprises bentonite and alkali modified fly ash, and the alkali modified fly ash is alkali solution modified fly ash. The preparation method disclosed by the invention comprises the steps of mixing calcium hydroxide, copper oxide, bentonite and the alkali modified fly ash, adding a binder into the mixture, carrying out strip extruding, carrying out drying, and carrying out roasting, thereby preparing the dechlorinating agent. The dechlorinating agent obtained by using the preparation method can achieve a dechlorination function at normal temperatures and has relatively high dechlorination accuracy and penetrating chlorosity.

The invention relates to a high-activity dechlorinating agent for a fixed bed and a preparation method thereof. The preparation method comprises the following steps of: swelling methyl cellulose with deionized hot water; adding calcium chloride after the methyl cellulose is completely dissolved; uniformly stirring to completely dissolve the calcium chloride; dissolving NaOH in deionized water; dropwise adding NaOH aqueous solution into homogeneous phase aqueous solution of the methyl cellulose and Ca<+2> ions with violent stirring; performing centrifugal separation to obtain filter cakes; adding clay into the filter cakes; kneading and then extruding into strips; drying; calcining; and cooling to obtain the high-activity dechlorinating agent for the fixed bed. In the method, Ca(OH)2 precipitates are produced by precipitation reaction of the Ca<2+> and OH<-1>; the produced Ca(OH)2 is nanosized through dispersion, complexing and template action of the methyl cellulose; the clay is directly added without washing or drying after the precipitates are subjected to centrifugal separation; and the mixture is kneaded and extruded into strips so as to prepare a product. The defect that the commercial Ca(OH)2 is individually used as an active ingredient is overcome, and the high-activity dechlorinating agent has a large specific surface area and high chlorine content and dechlorinating activity, and the preparation process is simple and is low in cost.

The invention discloses a dechlorinating agent suitable for blast furnace gas and a preparation method of the dechlorinating agent. The dechlorinating agent is prepared from the following raw materials in parts by weight: 20-55 parts of calcium hydroxide; 2-20 parts by weight of sodium carbonate; 2-10 parts by weight of zinc oxide; 1-9 parts by weight of red mud; 1-9 parts by weight of carbide slag; 20-40 parts by weight of a carrier; and 1-10 parts by weight of a binder. The dechlorinating agent has relatively high chlorine capacity. The invention also discloses application of a composition in improving the chlorine capacity of the dechlorinating agent suitable for blast furnace gas.

The invention provides a dechlorination agent. Ferrous sulfate, calcium powder and high-sulfur capacity powder are taken as effective raw materials, ferrous sulfate and calcium hydroxide in the calcium powder are firstly used for reacting to generate iron hydroxide oxide and calcium sulfate, iron hydroxide oxide which is produced by reacting and the high-sulfur capacity powder which is directly added and takes iron hydroxide oxide as a main component are jointly used as active components, the synergy between the two active components is fully exerted, and the chlorine capacity of the dechlorination agent is effectively improved; and simultaneously, calcium sulfate which can be autogenously produced in the reaction process and has a bonding effect is further used to optimize a pore canal, a specific surface area and distribution of an active center in the structure of the dechlorination agent, and the mechanical strength of the dechlorination agent can be further effectively improved. The dechlorination agent provided by the invention has relatively high chlorine capacity and mechanical strength, and data shows that the chlorine capacity of the dechlorination agent is above 65% and the mechanical strength is above 100N/cm.

The invention belongs to the field of flue gas deacidification and material preparation, and discloses a selective dechlorination absorbent, a preparation method and a use method. The absorbent for selective dechlorination comprises sodium bicarbonate, sodium sulfite and sodium oxalate, and the mass ratio of sodium bicarbonate to sodium sulfite to sodium oxalate is (1-2): (3-5): (3-5). The preparation method comprises the following steps: (1) weighing sodium bicarbonate, sodium sulfite and sodium oxalate, uniformly mixing to obtain a mixture, then adding water, and stirring until the mixture is pasty to obtain mixed slurry; (2) standing the mixed slurry in an open air for cooling, and naturally airing; and (3) drying the air-dried mixed slurry, and crushing and sieving the dried mixed slurry to obtain the selective dechlorination absorbent. The absorbent provided by the invention can react with more hydrogen chloride, but does not react with other acidic components, has efficient selectivity on hydrogen chloride, is simple in preparation method and high in chlorine capacity, and has a wide application prospect.

The invention relates to high-temperature gas antichlor. The antichlor is prepared from the following raw materials in parts by weight: 20-26 parts of clay, 12-17 parts of calcium carbonate, 8-12 parts of calcium oxide, 22-28 parts of calcium hydroxide and 10-15 parts of hydrotalcite. The antichlor is prepared by the following steps: weighing raw materials in the weight ratio, mixing, grinding, screening through a 100-mesh screen, and uniformly mixing; and extruding and molding the mixed material with water, drying and roasting at the temperature 600-750 DEG C for 2-4 hours. The process for preparing the gas antichlor is simple and has low cost; and the gas antichlor has stable performance, high chlorine tolerance and good purity, and can be widely applied to removal of hydrogen chloride in high-temperature fuel gas and high-temperature gas.

The invention discloses a novel high-temperature dechlorinating agent and a preparation method thereof. The dechlorinating agent is filled in a fixed bed reactor, hydrogen chloride in regenerated flue gas is purified and removed through a solid dechlorinating method, and the dechlorinating agent is composed of an active component, a carrier, a pore-forming agent, a binder and a reinforcing agent, and specifically comprises the following components in parts by weight: 30-55 parts of the active component, 20-30 parts of the binder, 10-15 parts of the carrier, 5-10 parts of the pore-forming agent and 2-5 parts of the reinforcing agent. Through the use of the carrier and the binder, the prepared high-temperature dechlorinating agent has relatively high strength, relatively high water resistance, relatively high argillization resistance, relatively high temperature resistance, relatively high oxygen resistance and relatively high CO2 carbonation resistance; the penetrating chlorine capacity of the high-temperature dechlorinating agent reaches 40%, rapid loss of active components during use of the dechlorinating agent is reduced, harm and influence of loss of the active components of the dechlorinating agent on production of a reforming catalyst are reduced, and the dechlorinating agent which is stable to develop, high in chlorine capacity and long in service life is achieved.