5results about How to "Shorten desorption time" patented technology

The application discloses a system and method for treating high-concentration cyclohexane oxidation tail gas. The system comprises an adsorption / desorption module and an absorption / desorption module, and can directly treat high-concentration cyclohexane oxidation tail gas while meeting the gas emission requirements. The system has the advantages of short overall process, high cyclohexane recovery rate, reasonable energy utilization, low energy consumption and the like.

The present invention provides an organic waste gas recovery device and process, belonging to the technical field of organic waste gas treatment. It includes a condensation system, a membrane separation system, an adsorption system, and a vacuum system, wherein the vacuum system includes a vacuum pump 1 and a vacuum pump 2 that operate independently, wherein the inlet and outlet of the vacuum pump 1 are respectively connected to the membrane separation system and the condensation system, and the organic gas separated in the membrane separation system is circulated back to the condensation system by the vacuum pump 1; the inlet and outlet of the vacuum pump 2 are respectively connected to the adsorption system and the condensation system; the organic gas desorbed in the adsorption system is circulated back to the condensation system by the vacuum pump 2. In the present invention, the membrane separation system and the adsorption system are respectively separated by independent vacuum pumps to separate organic gas and air and desorb organic matter. In this way, the two systems do not interfere with each other, and the intermittent vacuum operation of the adsorption system will not affect the continuous vacuum operation of the membrane separation system, which effectively ensures the working stability of the membrane separation system.

The invention relates to a gas purification system, in particular to a self-heating type hydrogen deoxidizing, dehydrating and purifying system and method for a hydrolysis hydrogen production process, and aims to solve the problems that an existing hydrogen purification system is high in operation difficulty, relatively high in energy consumption and incomplete in dehydration. The system comprises a deoxidation and preliminary dehydration unit and a deep dehydration unit, the deep dehydration unit comprises a second heater, a second cooler, a regenerated gas separator, an adjustable ejector, a first dehydration tower, a second dehydration tower, a third dehydration tower, a pressure reducer and a post-filter; the first dehydrating tower, the second dehydrating tower and the third dehydrating tower are respectively provided with three input end pipelines and three output end pipelines, the first dehydrating tower, the second dehydrating tower and the third dehydrating tower are used for adsorbing moisture in fluid, the pressure reducer is used for reducing the pressure of the fluid, and the adjustable ejector is used for increasing the pressure of the fluid; and the rear filter is used for filtering adsorbent dust entrained in the fluid.

This invention discloses a V₂O₅-TiO₂ composite honeycomb hollow sphere catalyst and its preparation method. The catalyst is a multilayered hollow sphere formed using V₂O₅-TiO₂ composite oxide as the matrix, wherein the mass ratio of V₂O₅ to TiO₂ is 5:5 to 7:3; the outer diameter of the multilayered hollow spheres is 5 to 20 mm, and the wall thickness is 2 to 12 mm; the sphere walls contain honeycomb-like vertical pores with a pore size of 10 to 50 μm, and the pores account for 15 to 30% of the total sphere wall volume. The V₂O₅-TiO₂ composite honeycomb hollow sphere catalyst of this invention exhibits superior compressive strength and Cl₂ resistance. ‑ The activity retention rate is also significantly reduced, and the desorption temperature and desorption time are also significantly reduced, which can greatly improve the desorption efficiency of amine solution after absorbing saturated CO2.

The invention relates to a sensing material for detecting isoprene in exhaled air and sensing equipment thereof, the sensing material is an n-type In2O3-based semiconductor two-dimensional nanosheet with the thickness of 10-100 nm, p-type impurities Cr, Cu and Ni with the content of 0-10 wt.% are doped to construct a p-n heterojunction, 0-5 wt.% of uniformly distributed Pt nanoclusters with the diameter of 2-5 nm are loaded, the sensing detection lower limit of isoprene reaches 2 ppb, and the sensing material can be used for detecting isoprene in exhaled air. And the responsiveness to isoprene is 4-10 times that of other gases in expired air. The optimized sensing material is fixed on a sensing chip of one of interdigital and annular electrode structures and the like, and is integrated on the surface of the electrode of the sensing chip to serve as a sensitive layer interacting with isoprene molecules, and the prepared portable digital display sensor can detect the concentration of isoprene in expired gas of a potential lung cancer patient within 3 seconds. The method is low in cost, easy to obtain, noninvasive, simple and convenient to operate, rapid in detection and high in accuracy, greatly promotes non-invasive early screening and monitoring of lung cancer, and meets various medical scenes and health management requirements.