This study investigated the optimal conditions for preparing desulfurizing stalk carbon, using corn stalk as a raw material and zinc chloride as an activator. The structure of stalk carbon was characterized using thermogravimetry (TG), fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and Brunauer – Emmelt – Teller (BET). Results found no significant difference in stalk carbon desulfurization properties when using stalk skin, core, or a skin-core mixture as raw material. The desulfurization performance of stalk carbon prepared using a skin-core mixture, was the most effective when the material : liquid ratio was 1:2; activation temperature was 350 °C; and activation time was 70 min. The corresponding H2S adsorption time was 74 min. The large specific surface area of 562.28 m2/g and abundant pore-volume of 0.3851 ml/g was found in the desulfurization stalk carbon prepared using these conditions. The increase in micropores and the abundant oxygen-containing functional surface groups were conducive to H2S adsorption. The desulfurization products were found to be mainly elemental S and sulfite.

中文翻译：

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玉米秸秆脱硫活性炭的制备及脱硫结构的表征

本研究以玉米秸秆为原料，氯化锌为活化剂，研究了制备脱硫秸秆炭的最佳条件。使用热重法 (TG)、傅里叶变换红外光谱 (FT-IR)、扫描电子显微镜 (SEM)、X 射线光电子能谱 (XPS) 和布鲁诺-埃默尔特-特勒 (BET) 对茎碳的结构进行了表征。结果发现，当使用秸秆皮、芯或皮芯混合物作为原料时，秸秆碳脱硫性能没有显着差异。使用皮芯混合法制备的秸秆炭的脱硫性能在料液比为1：2时效果最好；活化温度为350℃；激活时间为 70 分钟。相应的 H2S 吸附时间为 74 分钟。562的大比表面积。在使用这些条件制备的脱硫秸秆炭中发现 28 m2/g 和 0.3851 ml/g 的丰富孔体积。微孔的增加和丰富的含氧功能表面基团有利于H2S的吸附。发现脱硫产物主要是元素硫和亚硫酸盐。