Adsorption and Separation of Ethyl Mercaptan from Methane Gas on HNb3O8 Nanosheets,Industrial & Engineering Chemistry Research

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Adsorption and Separation of Ethyl Mercaptan from Methane Gas on HNb3O8 Nanosheets
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2021-06-01 , DOI: 10.1021/acs.iecr.1c00460
Xiang Zhang _{1,

2} , Liping Wang _{1,

2} , Lifang Hu _{1,

2} , Jie He _{1,

2}

Affiliation

Light mercaptan (R-SH, R = C₁–C₄) is commonly found in various methane gases. These R-SH compounds are toxic, odorous, and corrosive. On the other hand, they are very important chemical raw materials. Hence, the physical separation of light mercaptan from methane has great economic and environmental benefits. In this paper, a stripping recombination method was adopted to prepare HNb₃O₈ nanosheet (HNS) aggregation for the adsorption and separation of a mixed gas of ethyl mercaptan (Et-SH) from methane. The composition, morphology, structure, and acidity of the prepared samples were characterized in detail by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), laser Raman spectroscopy (LRS), ¹H magic-angle spinning nuclear magnetic resonance (¹H MAS NMR), and N₂ adsorption and desorption. The cyclic regeneration performance of HNS adsorption and separation of Et-SH from methane gas was studied. Through the analysis of the crystal structure and acidity of HNS, combining characterizations of the adsorbent before and after adsorption and regeneration, and the detection of the regenerated outlet gas, the types of adsorption mechanisms are obtained. Molecular-level adsorption mechanisms of Et-SH on HNS are proposed by density functional theory (DFT) calculations.

中文翻译：

HNb ₃ O ₈纳米片上甲烷气体中乙硫醇的吸附分离

轻质硫醇 (R-SH, R = C ₁ –C ₄ ) 常见于各种甲烷气体中。这些 R-SH 化合物具有毒性、气味和腐蚀性。另一方面，它们是非常重要的化工原料。因此，从甲烷中物理分离轻硫醇具有巨大的经济和环境效益。本文采用剥离复合法制备HNb ₃ O ₈用于从甲烷中吸附和分离乙硫醇 (Et-SH) 混合气体的纳米片 (HNS) 聚集。通过粉末X射线衍射（XRD）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）、高分辨透射电子显微镜（HRTEM）对制备的样品的组成、形貌、结构和酸度进行了详细表征、激光拉曼光谱 (LRS)、¹ H 魔角旋转核磁共振 ( ¹ H MAS NMR) 和 N ₂吸附和解吸。研究了HNS吸附和从甲烷气体中分离Et-SH的循环再生性能。通过对HNS晶体结构和酸度的分析，结合吸附再生前后吸附剂的表征，以及再生后出口气体的检测，得到了吸附机理的类型。通过密度泛函理论 (DFT) 计算提出了 Et-SH 在 HNS 上的分子级吸附机制。

更新日期：2021-06-17

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