用于从天然气中吸附去除硫化氢的氨基改性分子筛
Amino-modified molecular sieves for adsorptive removal of HS from natural gas.
作者信息
Zhang Jiaojing, Song Hua, Chen Yanguang, Hao Tianzhen, Li Feng, Yuan Dandan, Wang Xueqin, Zhao Liang, Gao Jinsen
机构信息
Provincial Key Laboratory of Oil & Gas Chemical Technology, College of Chemistry & Chemical Engineering, Northeast Petroleum University 163318 Daqing China.
Key Laboratory of Enhanced Oil & Gas Recovery of Education Ministry, College of Petroleum Engineering, Northeast Petroleum University 163318 Daqing China.
出版信息
RSC Adv. 2018 Nov 20;8(66):38124-38130. doi: 10.1039/c8ra06859c. eCollection 2018 Nov 7.
Amine-modified MCM-41 adsorbents (APTMS/MCM-41, PEI/MCM-41 and AAPTS/MCM-41) were prepared and characterized by XRD, N adsorption-desorption, FT-IR, TEM, SEM and TG-DTA. The performance of each adsorbent in a fixed adsorption bed for HS removal was measured using a mixture of oxygen, nitrogen and hydrogen sulfide gases. It was found that the specific surface area decreased and the topography changed significantly after the use of each modified adsorbent. Nevertheless, all amine-modified MCM-41 adsorbents retained mesoporous silica of MCM-41. The HS removal rate and saturated HS capacity of APTMS/MCM-41 improved from 32.3% to 54.2% and 119.5 to 134.4 mg g, respectively, compared with that of MCM-41, and it showed the best performance among all adsorbents. APTMS/MCM-41, PEI/MCM-41 and AAPTS/MCM-41 were regenerated by maintaining at 423, 523 and 373 K in nitrogen for 3 h, respectively, and thus possessed high regenerability.
制备了胺改性的MCM-41吸附剂（APTMS/MCM-41、PEI/MCM-41和AAPTS/MCM-41），并通过XRD、N吸附-脱附、FT-IR、TEM、SEM和TG-DTA对其进行了表征。使用氧气、氮气和硫化氢气体的混合物，测定了每种吸附剂在固定吸附床中脱除HS的性能。结果发现，每种改性吸附剂使用后比表面积降低，形貌发生显著变化。然而，所有胺改性的MCM-41吸附剂均保留了MCM-41的介孔二氧化硅结构。与MCM-41相比，APTMS/MCM-41的HS脱除率从32.3%提高到54.2%，饱和HS吸附量从119.5提高到134.4 mg/g，在所有吸附剂中表现出最佳性能。APTMS/MCM-41、PEI/MCM-41和AAPTS/MCM-41分别在氮气中于423、523和373 K下保持3 h进行再生，因此具有高再生性。
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