دانلود رایگان مقاله لاتین تبدیل لوولینیک اسید به btx بر کاتالیزور از سایت الزویر
عنوان فارسی مقاله:
تبدیل لوولینیک اسید به BTX بر کاتالیزور های مختلف زئولیت
عنوان انگلیسی مقاله:
Conversion of levulinic acid to BTX over different zeolite catalysts
سال انتشار : 2016
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مقدمه انگلیسی مقاله:
1. Introduction
Currently, the majority of the aromatics (BTX) production uses fossil sources, and is based on catalytic reforming and naphtha pyrolysis [1]. Recently, a few sustainable approaches were identified and one such option is to produce BTX from biomass using heterogeneous catalytic processes [1,2]. Particularly, lignocellulosic biomass is identified as economically viable and carbon neutral feedstock for the production of biofuels and chemicals through heterogeneous catalytic routes [3,4,5]. Levulinic acid has been identified as a promising biomass-derived chemical, whose production is economically viable, by the higher yielding acid hydrolysis of lignocellulosic biomass [6]. Many companies such as Biofine [7], DSM [8], Segetis [9] and GF biochemicals have developed the technology based on this concept. GF biochemicals started the world's largest commercial production of levulinic acid in 2015 at a production scale of 2000 MT/a in Caserta, Italy [10,11]. Several reviews have been published describing the potential industrial applications of LA [12–14]. However, the use of LA as raw material for the production of BTX is still not well explored, especially through heterogeneous routes. Catalytic pyrolysis of biomass using zeolite catalyst is considered as one of the most promising technology to produce BTX [15], however, through pyrolysis, it is difficult to control the selectivity and yield of different products. Tsutsui et al. have investigated the conversion of levulinic acid to BTX over ZSM-5 zeolite [16]. It can be expected that the interplay of chemical and textural properties of zeolites controls their performances in the conversion of LA to BTX [17]. In particular, BTX selectivity is a result of size, shape and connectivity of zeolite channels together with the concentration, type, and location of active sites. Therefore the selection of the zeolite with a specific composition possessing required acid site density and strength, structure and pore size distribution for optimal transport of molecules is needed to achieve high aromatic yields. The relationship between textural and chemical parameters and catalytic performance of zeolite in any catalytic reaction is of critical importance for the performance of such zeolite catalyst. Generally, reaction parameters can be divided into 2 groups: i) variables of catalytic reaction (reaction temperature, space velocity, concentration and molar ratio of reactants, and thermodynamic equilibrium), and ii) properties of the zeolite catalysts (channel size and dimensionality of the channel system, type and strength of acid sites, their location and density, as well as the rate of coking). We undertook the study to explore the impact of i) amount of acid sites and its strength ii) pore size and iii) pore geometry on the conversion of LA and selectivity to BTX. The effects of catalyst loading, reaction temperature, and reaction time on the formation of BTX were also investigated.
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کلمات کلیدی:
Conversion of Biomass-Derived Oxygen ... - Search ProQuest search.proquest.com/openview/e2d149caa7897ac9948acb4b27e4274f/1?pq...cbl... by T Goshima - 2014 - Cited by 1 - Related articles Levulinic acid and acetic acid were suitable for generating BTX with ZSM-5. On the other hand, the butyric acid was valuable for converting to chemical raw ... Hydrodeoxygenation of Levulinic Acid over Supported Catalysts https://dspace.library.uu.nl/bitstream/handle/1874/307933/Luo.pdf?sequence=1 by W Luo - 2014 - Related articles Selective, One-pot Catalytic Conversion of Levulinic Acid to Pentanoic Acid over Ru/H- .... xylene isomers (BTX), small olefins, and CO/H2) remains to be seen. Conversion of levulinic acid to BTX over different zeolite catalysts - خانه zoodyab.ir/.../125763-conversion-of-levulinic-acid-to-btx-over-diff... - Translate this page Conversion of levulinic acid to BTX over different zeolite catalysts ... space and steric hindrance gave the highest BTX yield of 31% and least amount of coke. Sparrho | Conversion of levulinic acid to BTX over different zeolite https://www.sparrho.com/item/conversion-of-levulinic-acid-to-btx-over.../9bad88/ Publication date: 5 January 2017 Source:Catalysis Communications, Volume 88 Author(s): Asima Sultana, Tadahiro Fujitani Zeolites having a different. Conversion of Biomass-Derived Oxygen-Containing ... - Scientific.net https://www.scientific.net/AMM.625.298.pdf by T Goshima - 2014 - Cited by 1 - Related articles Sep 12, 2014 - conversion of oxygen-containing intermediates which are furfural, ... levulinic acid were converted to basic chemicals, especially BTX and ... Biofuels: Alternative Feedstocks and Conversion Processes https://books.google.com/books?isbn=0123851009 Ashok Pandey, Christian Larroche, Steven C Ricke - 2011 - Science Alternative Feedstocks and Conversion Processes Ashok Pandey, Christian ... O O O O O BTX Lignin Carbohydrates have the possibility to be converted to a wide ... producing important platform chemicals like levulinic acid (LA; from glucose) ... Levulinic Acid Biorefineries: New Challenges for Efficient Utilization of ... onlinelibrary.wiley.com/doi/10.1002/cssc.201501405/abstract Feb 5, 2016 - Levulinic acid is a sustainable platform molecule that can be upgraded to valuable chemicals and fuel additives. This article focuses on the ...
