73 results about "Carbon monoxide adsorption" patented technology

An apparatus removes carbon monoxide (CO) from a hydrogen-rich gas stream in a hydrogen fuel cell system. CO fouls costly catalytic particles in the membrane electrode assemblies of proton exchange membrane (PEM) fuel cells. A vessel houses a carbon monoxide adsorbent. The vessel may be a rotating pressure swing adsorber. A water gas shift reactor is upstream of the rotating pressure swing adsorber. The water gas shift reactor may include a second adsorbent adapted to adsorb carbon monoxide at low temperatures and to desorb carbon monoxide at high temperatures. The apparatus advantageously eliminates the use of a preferential oxidation (PROX) reactor, by providing an apparatus which incorporates CO adsorption in the place of the PROX reactor. This cleans up carbon monoxide without hydrogen consumption and the concomitant, undesirable excess low grade heat generation. The present invention reduces start-up duration, and improves overall fuel processor efficiency during normal operation.

The invention relates to a nano-fiber and micro-fiber composite anti-haze gauze mask. The gauze mask has the advantages that the air resistance is low, and the particulate pollutant filtering efficiency is high; the gauze mask can filter volatile organic compounds, acid gas, alkaline gas, nitric oxides, sulfur oxides and carbon monoxide, or eliminate smoke, peculiar smell, formaldehyde and the like, and can be used for prevention in various pollution-gase sites. The nano-fiber and micro-fiber composite anti-haze gauze mask includes at least one micro-fiber layer and a nano fiber layer, wherein the nano fiber layer is arranged on the inner side of the micro-fiber layer and can filter volatile organic compounds, acid gas, alkaline gas, nitric oxides, sulfur oxides and carbon monoxide and eliminate smoke, peculiar smell and formaldehyde; functional additives are added into nano fibers of the nano fiber layer and include a VOC adsorbent, an aidic adsorbent, an alkaline adsorbent, a bactericide, an antiviral agent, a photolysis catalyst used for decomposing VOC, a formaldehyde catalytic oxidant and a carbon monoxide adsorbent.

The invention provides a selective hydrogenation method of alkyne and alkadiene in a C4 hydrocarbon material flow. The method provided by the invention comprises the following steps of: adding the C4 hydrocarbon material flow containing alkyne and/or alkadiene and hydrogen gas into a hydrogenation reactor which is filled with a load type palladium catalyst; carrying out the selective hydrogenation on the alkyne and/or alkadiene in the C4 hydrocarbon material flow to form olefin when an inlet temperature is in a range of 10-80 DEG C, a mol ratio of the hydrogen gas to the sum of the alkyne and the alkadiene is 1-10 and a reaction pressure is in a range of 0.1-4 Mpa, and removing the olefin, wherein the load type palladium catalyst comprises a carrier, palladium and selective modified components; testing the load type palladium catalyst by utilizing a carbon monoxide adsorption in-situ infrared spectroscopy at the temperature of 40 DEG C to obtain an area ratio of a bridge type absorption peak at the 1930-1990cm<-1> to a bridge type absorption peak at the 1870-1930cm<-1> in an obtained infrared spectrogram is less than 0.2, more preferably less than 0.15. The method provided by the invention has a high selectivity to the selective hydrogenation of the alkyne and the alkadiene in the C4 hydrocarbon material flow and can be operated for a long period.

The invention provides a selective hydrogenation method of alkyne and dialkene in an alkene stream. The method comprises the steps that: an alkene stream containing alkyne and/or dialkene, and hydrogen are delivered into a hydrogenation reactor provided with a supported palladium catalyst; alkyne and/or dialkene in the alkene stream are hydrogenated into alkene under conditions of: a temperature in of 10 to 80 DEG C, a molar ratio of hydrogen to a total amount of alkyne and dialkene of 1 to 10, and a reaction pressure of 0.1 to 4 Mpa, such that alkyne and/or dialkene in the alkene stream are removed. The supported palladium catalyst comprises a carrier, palladium and optional modifying components. With a carbon monoxide adsorption in situ infrared spectroscopy method, the catalyst is tested under a temperature of 40 DEG C. In an obtained infrared spectrogram, an area ratio of an overhead absorption peak at a location of 1983 to 1990cm-1 to that at the location of 1870 to 1930cm-1 is lower than 0.2, and preferably 0.15. The method provides a high selectivity in the selective hydrogenation of alkyne and dialkene. The method can operate for a long period.

The invention relates to a cooling and dehumidifying system of an underground shelter. The arrangement and use of mine emergency shelters in underground mines are important measures in mine emergency rescue, and the mine emergency shelters are successful in rescue for multiple times. The cooling and dehumidifying system of the underground shelter comprises a refrigerant bottle (1), an equipment compartment (15) and a main compartment(2), wherein the refrigerant bottle is arranged in the equipment compartment and is connected with a main valve (3) through a high pressure gauge (14), and the main valve is connected with a throttle valve (4); the throttle valve is connected with an expansion valve (5), and the expansion valve is connected with an evaporator (6); the evaporator is connected with a low pressure gauge (7), and the low pressure gauge is connected with a reversing valve (8); and the reversing valve is connected with a pneumatic fan (9) and is connected with a high-pressure air pipe (10), and a carbon monoxide adsorbent device (11) and a carbon dioxide adsorbent device (12) are arranged in the main compartment. The invention is used for the underground shelter.

The invention provides vacuum swing adsorption processes that produce an essentially carbon monoxide-free hydrogen or helium gas stream from, respectively, a high-purity (e.g., pipeline grade) hydrogen or helium gas stream using one or two adsorber beds. By using physical adsorbents with high heats of nitrogen adsorption, intermediate heats of carbon monoxide adsorption, and low heats of hydrogen and helium adsorption, and by using vacuum purging and high feed stream pressures (e.g., pressures of as high as around 1,000 bar), pipeline grade hydrogen or helium can purified to produce essentially carbon monoxide -free hydrogen and helium, or carbon monoxide, nitrogen, and methane-free hydrogen and helium.

A carbon monoxide adsorbent comprises the following raw materials, by weight: 38 to 42% of cuprous chloride, 18 to 23% of 13X molecular sieves, 8 to 10% of aluminium hydroxide, and 28 to 35% of purified attapulgite powder. The adsorbent is produced by the following steps: a. the 13X molecular sieves are baked in a 200 DEG C oven for 120 to 150 minutes; b. the four raw materials are mixed into a mixed material, which is put into a kneader, purified water, the weight of which is 10% of that of the mixed material, is added into the kneader for kneading for 20 to 25 minutes, and kneaded material is obtained; c. the kneaded material is then processed by an strip extruder into strip-shaped objects with sizes between phi 3 mm * 8 mm and phi 3 mm * 15 mm; and d. the strip-shaped objects are put into the oven, baked at a temperature between 300 and 320 DEG C for 180 to 200 minutes, then taken out, and made into the carbon monoxide adsorbent after natural cooling. The carbon monoxide adsorbent is scientific in combination. Especially by adding 200 mesh purified attapulgite powder which undergoes crushing, purification, ultrafine processing and activation processing, the carbon monoxide adsorbent is improved in adsorption capability and substantially lowered in cost. The price of the carbon monoxide adsorbent is two thirds of those of similar products.

The invention discloses a supported palladium catalyst with characteristic of specific infrared absorption, comprising a carrier, palladium and optional modifying component. For finding a noble metal catalyst with good catalytic performance accurately and effectively, the carbon monoxide adsorption in-situ infrared spectroscopy is used for testing the catalyst at the temperature of 40 DEG C, in the obtained infrared spectrum, the ratio of the area of a bridge type absorption peak at the value of 1930-1990 cm<-1> to the area of a bridge type absorption peak at the value of 1870-1930 cm<-1> is less than 0.2, and more preferably 0.15. In addition, preferably, the ratio of the peak height of an absorption peak at the value of 1870-1930 Cm<-1> in the in-situ infrared spectrogram obtained by testing the catalyst when being purged with nitrogen gas for 0 min to the peak height of an absorption peak at the value of 1800-1900 cm<-1> in the in-situ infrared spectrogram obtained by testing the catalyst when being purged with nitrogen gas for 15 min is less than 5, and more preferably 2. The catalyst has excellent reaction selectivity and activity, and the preparation method of the catalyst is easy to operate and saves energy.

The invention provides a catalyst for carbon monoxide conversion, comprising from 10 to 90% by mass of a copper oxide ingredient, from 5 to 50% by mass of a zinc oxide ingredient and from 10 to 50% by mass of an aluminum oxide ingredient, and having a specific surface area of from 100 to 300 m²/g, a carbon monoxide adsorption of from 20 to 80 μmol/g, and a copper oxide crystallite diameter of at most 200 angstroms, as a catalyst suitable for carbon monoxide conversion for fully reducing carbon monoxide in the hydrogen gas obtained through reforming of a starting hydrocarbon material, for the purpose of enabling stable long-term operation of a fuel cell which uses hydrogen gas as a fuel and which is frequently and repeatedly started and stopped.

The invention provides a selective hydrogenation method for allylene and allene in propylene material flow. The method comprises the following steps of: introducing the propylene material flow containing 1-(methylamino)-2,3-propanediol (MAPD) and hydrogen into a hydrogenation reactor filled with a supported palladium catalyst, and performing selective hydrogenation on the MAPD in the propylene material flow at the inlet temperature of between 10 and 80 DEG C and a molar ratio of the hydrogen to the MAPD of 1-5 under the reaction pressure of 0.1-4Mpa, so that the MAPD becomes propylene and is removed, wherein the catalyst comprises a carrier, palladium and optional modifying components; and a carbon monoxide adsorption in situ infrared ray spectroscopy is used for testing the catalyst at 40DEG C, and an area ratio of a bridge absorption peak at a position of 1,930-1,990cm<-1> to a bridge absorption peak at a position of 1870-1,930cm<-1> in an infrared spectrum is less than 0.2 and preferably less than 0.15. By the method, the selective hydrogenation reaction for the allylene and allene in the propylene material flow has high selectivity, and can be stably performed for a long period.

The invention relates to a multi-element high-activity component carbon monoxide adsorbent as well as a preparation method and application thereof. The multi-element high-activity component carbon monoxide adsorbent is mainly prepared by an active component co-precipitation method; an active component comprises high-valence oxide of Cu, Zn, Mn, Ni and Fe: CuO, ZnO, MnOx, NiO and FeOy as well as dispersing agent Al2O3 powder. The multi-element high-activity component carbon monoxide adsorbent as well as the preparation method and application thereof have the benefits that by utilizing the characteristic of complementary performances of different components, the multiple components reach high-valence states through oxidation, and further, the ability to remove carbon monoxide by chemical adsorption is realized; the effect of a catalyst of the multi-element high-activity component carbon monoxide adsorbent is superior to that of a single or two-component catalyst; the multi-element high-activity component carbon monoxide adsorbent has the advantages of being free from loss of effective component of feed gas, high in removal depth, large in capacity, low in activation temperature, strong in anti-sintering ability, long in service life, high in mechanical strength, hard to pulverize and the like, is suitable for C2H4, C3H6, CH4, H2, N2, He, Ne, Ar, Kr, Xe and deep removal of the carbon monoxide by electron gas, and can be widely applied to large-scale industrial production.