35 results about "Hydrogen density" patented technology

The invention relates to a pre-processing-free test sampling device and a testing method for testing the hydrogen sulfide in sewage, particularly providing a test sampling device and a testing method which is free of pre-processing and has the advantages of low cost, small floor interference, and the hydrogen sulfide density in sewage can be determined easily at site or at the original position. The sampling device is provided with an external pipe, an internal pipe, a retainer ring and a gas-liquid separating film, the internal pipe is arranged in the middle of the external pipe, the gas-liquid separating film is covered on the upper and the lower cross-sections of the external pipe and then fixedly embedded on the upper and the lower cross-sections of the internal pipe by the retainer ring. Developer solution is added into the internal pipe of the sampling device, and then the sampling device is arranged in the sample cup filled with water sample under test; 0.1-10 percent of hydrochloric-acid solution of relative water sample is added into the water sample, the sulfureted hydrogen in the water diffuses through the gas-liquid separating film and enters into the sampling device and the color is developed; the test solution in the sampling device is filled into a colorimetric container, the water is taken as reference, and the absorbance value is measured at 665nm by a spectrophotometer; the sulfureted hydrogen density in the water sample is measured by a standard working curve, and semiquantitative method can also be adopted to measure the density rapidly by optical colorimetry.

The invention relates to a refrigeration and low-temperature technology, and provides a low-temperature Dewar container. The low-temperature Dewar container comprises a low-temperature Dewar module; the low-temperature Dewar module comprises a hydrogen storage pressure bearing layer and a cold storage sandwich layer; a hydrogen accessing coil is arranged in the cold storage sandwich layer, is bentto extend in the cold storage sandwich layer, and is provided with a high-pressure hydrogen inlet and a high-pressure hydrogen outlet; and the high-pressure hydrogen outlet communicates with the hydrogen storage pressure bearing layer. The invention further provides a low-temperature high-pressure hydrogen storage system, which comprises the low-temperature Dewar container. As supercharging module and a cooling module cooperate for supercharging and cooling, the hydrogen density can be increased in a state of maintaining hydrogen phase to achieve the purpose of improving the hydrogen storagequality in the hydrogen storage pressure bearing layer; and compared with a traditional hydrogen storage technology, the hydrogen storage and release process can be realized under the conditions of lower pressure and higher temperature, and the cold storage sandwich layer can use the cooling capacity in the hydrogen storage and release process.