Data for "Study on reaction characteristics of co-gasification of sludge and biomass"
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Data support for "Study on reaction characteristics of co-gasification of sludge and biomass"
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The thermal weight loss behavior of sludge/biomass was analyzed by a thermogravimetric analyzer (NETZSCHSTA 449F3, Germany). The temperature was increased from room temperature to 950 ℃ at a rate of 10 ℃/min in an Ar atmosphere. The residual carbon content in gasification slag is tested by a muffle furnace, and the carbon conversion rate during gasification is calculated. Additionally, it can use gas chromatography (GC 9790 Ⅱ) to detect the main gas components in combustible gas, including H2, CO, CO2, CH4, and C2-C3 hydrocarbon gases. Tar fractions were analyzed using the simulated distillation gas chromatograph (ASTM D2887). GC ×GC–MS was used to analyze tar components. It mainly includes a gas chromatograph (Agilent 7890B GC), hot and cold modulator (Zoxe-2 LN2), mass spectrometer (Agilent 5977B MSD), dryer, and air compressor. Each experiment was injected with a 1 μL sample, the inlet temperature was 300 ◦C, and the split ratio was 5: 1. The results were analyzed by NIST 2014 standard database. Finally, the tar components were divided into five types: aliphatic, phenols, oxygen-containing compounds, aromatic, and heteroatom- containing N and S. The distribution of tar fractions was analyzed by simulated distillation gas chromatograph (Agilent 7890B) and the method is ASTM D2887. Then, the column heating program was as follows: heating from 40 ℃ to 350 ℃ at a rate of 23 ℃/min and maintained for 1.52 minutes. The molecular weight distribution characteristics of tar were measured by gel permeation chromatography (PL-GPC50). The number average molecular weight (Mn), weight average molecular weight (Mw), polydispersity index (Mw/Mn), and other parameters were obtained to understand the molecular weight distribution of compounds in tar further. The experimental conditions are as follows: the temperature of the detector is 35 ℃, and the temperature of the column box is 40 ℃. Finally, tetrahydrofuran is used as the mobile phase, the flow rate is 1 mL/min, and the standard sample is polystyrene. Carbon conversion rate refers to the ratio of the carbon content in the gas and tar to the carbon content in the raw material. After conducting co-gasification experiments with different raw materials, the residual carbon contained in the gasification slag was subjected to combustion in a muffle furnace at 600 °C. The mass of the gasification slag was measured both before and after the reaction, enabling a quantitative determination of the carbon conversion efficiency. The corresponding calculation equation is as follows: X (carbon conversion rate) =((m_0-m_1)/(m_0-m_2 ))*100% m0: Mass of the samples; m1: Mass of the gasification slag; m2: Mass of gasification slag after combustion using muffle furnace.