Modification of pineapple leaf fibers with aminosilanes as adsorbents for H2S removal. (March 2021)

• Record Type: Journal Article
• Authors: Chanka, Napassorn; Mondach, Wongsaphat; Dittanet, Peerapan; Roddecha, Supacharee; Niamnuy, Chalida; Prapainainar, Paweena; Seubsai, Anusorn
• Is Part Of: Chemosphere. Volume 266(2021)
• Publication Date: 2021-03
• Subjects: Adsorbent -- Aminosilane -- H2S removal -- Pineapple leaf fiber -- Microcrystalline cellulose; Pollution -- Periodicals; Pollution -- Physiological effect -- Periodicals; Environmental sciences -- Periodicals; Atmospheric chemistry -- Periodicals; 551.511
• DOI: 10.1016/j.chemosphere.2020.129000
• Languages: English
• ISSNs: 0045-6535

Abstract

Abstract: Pineapple leaves were used as a natural fiber source to prepare various modified microcrystalline cellulose (MCC) samples as sorbents for H2 S sorption. Pineapple leaf fibers were first extracted from pineapple leaves, followed by hydrolyzing to produce MCC before various modifications using primary amine (3-aminopropyltrimethoxysilane, APS), secondary amine (N-methyl-3-aminopropyltrimethoxysilane, MAPS), or tertiary amine (N, N-dimethyl-3-aminopropyltrimethoxysilane, DAPS). The characterization results proved that all the aminosilane groups were successfully grafted onto the MCC. In addition, the thermal stability and the porosity of the modified sorbents were enhanced relative to those of unmodified MCC. The H2 S sorption studies of MCC modified with APS, MAPS, and DAPS at 0, 3, or 5%w/w showed that MCC-MAPS had better H2 S sorption performance than MCC-APS and MCC-DAPS, respectively, when comparing the H2 S sorption performance at the same loading level. The optimum H2 S sorption performance of each aminosilane group was achieved from MCC-APS at 5%, MCC-MAPS at 3%, and MCC-DAPS at 5%. An additional study of H2 S sorption of these three sorbents in the presence of CO2 showed that MCC-DAPS at 5% was the best sorbent for selective H2 S removal. Our results indicated that MCC modified with the aminosilane groups, especially MAPS, were promising materials for H2 S sorption, with potential application in gas separation. Graphical abstract: Image 1 Highlights: Efficient MCC sorbents for H2 S removal were successfully made from PALF. The thermal stability and the porosity of the modified sorbents were enhanced. The MCC with secondary aminosilane had the highest H2 S sorption performance. The MCC with tertiary aminosilane was the best sorbent for selective H2 S removal. The modified sorbents could be applied in gas separation and packaging.