5 results about "Thermo gravimetric" patented technology

The application provides a reactor applied to micro fluidized bed thermal gravimetric analysis and a thermal gravimetric analysis device, which comprises, from bottom to top, a connecting pipe section, a heating pipe section and a reaction pipe section connected in sequence; the lower end of the connecting pipe section is used for being connected with a gas source, and a wind distribution plate is arranged at the connecting position of the connecting pipe section and the heating pipe section; the inner wall of the heating pipe section is in a sine wave structure; a heat conduction plate is arranged in the heating pipe section, and the heat conduction plate is located at a preset position above the wind distribution plate; the upper end of the reaction pipe section is provided with a top cover, and a central through hole is arranged in the top cover; the inner wall of the heating pipe section is arranged in a sine wave structure, the inner wall structure in a sine wave is utilized, the heating area of the fluidized medium is effectively increased, and the heat transfer efficiency is greatly enhanced; the heat conduction plate is additionally arranged in the heating pipe section, the heat conduction performance of the heat conduction plate is utilized, the heat transfer efficiency is improved, the uniformity of temperature distribution in the reactor is promoted, the heating rate of the fluidized medium is further improved, and the accuracy of test results is ensured.

The invention discloses a potassium precipitation inhibitor and a reaction synergist for straw biomass pyrolysis, which are characterized in that the potassium precipitation inhibitor and the reaction synergist are coal gangue, and the addition amount of the coal gangue is 20-40% by mass. The method mainly comprises the following steps: putting a biomass mixed sample added with coal gangue into a tubular furnace, keeping a nitrogen atmosphere in the whole process at the temperatures of 250 DEG C, 300 DEG C, 400 DEG C, 500 DEG C and 600 DEG C, heating at the rate of 10 DEG C / min, holding for 60 minutes, cooling to room temperature in the nitrogen atmosphere after pyrolysis is finished, and then collecting a pyrolytic coke sample, testing and quantifying potassium metal in the pyrolysis sample through ICP-OES (Inductively Coupled Plasma-Optical Emission Spectrometer); tGA55 type thermogravimetric analysis is used for investigating the combustion characteristics of the biomass sample with the coal gangue addition amount.

The present application relates to a kind of systems and methods for using thermal analyzer and GC-MS automatic qualitative and quantitative analysis of organic matter, the system includes thermal gravimetric analyzer (TGA), preconcentrator (PRC) and gas chromatography mass spectrometer (GC-MS);The outlet of the TGA device is connected with the inlet of the PRC device by pipeline, the pipeline is transparent glass tube or polytetrafluoroethylene tube, inert quartz wool is inserted in the inside of the pipeline, the outlet of the PRC device is connected with the GC-MS device;The qualitative and quantitative analysis is based on the development of PRC-based interface device, combined with TGA and GC / MS, builds TGA-PRC-GC / MS system, can observe the pyrolysis weight loss process of microplastic, and the characteristic of small molecule volatile product escaped from microplastic pyrolysis is analyzed in combination with GC / MS, and the method for qualitatively and quantitatively analyzing microplastic is established.The present application studies microplastic in sample, has good recognizability and accuracy, and reaches good effect for qualitative and quantitative research of microplastic.

The application discloses a method for improving the measurement accuracy of a thermal gravimetric analyzer in measuring the deuteration rate of DKDP crystal. The method performs thermal gravimetric curve scanning on a DKDP crystal sample; wherein the reaction formula of the thermal decomposition of the DKDP crystal sample is K(D x H 1‑x )2PO4→KPO3+(D x H 1‑x )2O; the residual mass of the sample is obtained through the thermal gravimetric curve; and the calculation formula of the deuteration rate x of the DKDP crystal is as follows: x(%)=(58.599 / α-67.539)×100%; wherein α is the mass ratio of the residual mass measured by the thermal gravimetric analyzer to the mass of the sample. The method requires a small amount of sample, the measured deuteration rate is a point value rather than a statistical average value, can be measured in the full range of 0-100%, is simple to operate, and has high precision, and is a true sense of deuteration rate test.

The application provides a method for determining the mass proportion of tobacco components and application thereof, and the method comprises the following steps: balancing the mixed tobacco to be tested and its single components, then performing thermal gravimetric analysis, normalizing and first-order derivation on the obtained weight loss curve to obtain the weight loss rate curve of the mixed tobacco to be tested and its single components; selecting the weight loss rate Y of j same temperature points T on the weight loss rate curve of the mixed tobacco to be tested and its single components, establishing a j-element first-order equation group, and solving to obtain the mass proportion of each single component in the mixed tobacco to be tested. Compared with the prior art, the method provided by the application greatly reduces the complexity of the technical scheme, while ensuring the objectivity and accuracy of the determination of the mass proportion of tobacco components, and has important significance for evaluating the uniformity of tobacco component mixing, optimizing blending and mixing processing technology, and ensuring the consistency of cigarette product quality.