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Effect of zeolitic nano-catalyst on biodiesel yield and biochar formation during the pyrolysis of tallow
Biofuels ( IF 2.1 ) Pub Date : 2021-04-01 , DOI: 10.1080/17597269.2021.1882718
Lawrence I. Obidike 1 , Kelvin O. Yoro 1, 2
Affiliation  

Abstract

This study investigates the effect of zeolite nano-catalyst on the yield of biodiesel and biochar formed from the pyrolysis of tallow (cow fat). Residual waste cow fat was pyrolyzed in a fixed-bed reactor of laboratory-scale volume 2200 cm3, at operating temperatures of 450, 500, 530, and 580 °C and heating rates of 4, 5, and 6 °C/min. The molecular composition of cow fat was analyzed using a gas chromatography molecular spectrograph (GC-MS). It was observed that the biodiesel produced without a catalyst was mainly composed of aromatic carboxylic acids, esters, alkanes, alkenes, and alkanes, while the biodiesel produced with zeolite nano-catalyst consisted mainly of methyl esters, pentanoic acid, heptanoic acid, cyclo-olefins, 4,4-dimethylcyclohexene, butyl-cyclohexane, butyl-cyclopentane, and 1-pentylcyclopentene. A biodiesel yield of 58% was achieved when a 1% zeolite nano-catalyst was used to pyrolyze the tallow at an operating temperature of 530 °C and heating rate of 6 °C/min. When the tallow was pyrolyzed without a zeolitic catalyst, decarboxylation was promoted, and a higher biodiesel yield of 82.78 wt% was achieved. Results from this study revealed that although zeolite nano-catalyst did not show an incremental effect on the yield of biodiesel, it favors biogas production and biochar formation.



中文翻译:

沸石纳米催化剂对牛脂热解过程中生物柴油产率和生物炭形成的影响

摘要

本研究研究了沸石纳米催化剂对牛脂(牛脂肪)热解形成的生物柴油和生物炭产率的影响。剩余的废牛脂肪在实验室规模体积为 2200 cm 3的固定床反应器中热解,在 450、500、530 和 580 °C 的工作温度和 4、5 和 6 °C/min 的加热速率下。使用气相色谱分子光谱仪 (GC-MS) 分析牛脂肪的分子组成。观察到,不用催化剂生产的生物柴油主要由芳香族羧酸、酯、烷烃、烯烃和烷烃组成,而用沸石纳米催化剂生产的生物柴油主要由甲酯、戊酸、庚酸、环-烯烃、4,4-二甲基环己烯、丁基-环己烷、丁基-环戊烷和1-戊基环戊烯。当使用 1% 的沸石纳米催化剂在 530 °C 的操作温度和 6 °C/min 的加热速率下热解牛脂时,生物柴油的产率为 58%。当牛脂在没有沸石催化剂的情况下热解时,会促进脱羧,并实现了 82.78 wt% 的更高生物柴油产量。这项研究的结果表明,尽管沸石纳米催化剂对生物柴油的产量没有增加影响,但它有利于沼气的产生和生物炭的形成。

更新日期:2021-04-01
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