The catalytic deoxygenation reaction temperature and N2 gas flow rate influence the conversion of soybean fatty acids into Green Diesel

IF 5.5 3区工程技术 Q1 ENGINEERING, CHEMICAL Journal of the Taiwan Institute of Chemical Engineers Pub Date : 2024-08-26 DOI:10.1016/j.jtice.2024.105700

R.S.R.M. Hafriz , S.H. Habib , N.A. Raof , S.Z. Razali , R. Yunus , N.M. Razali , A. Salmiaton

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Abstract

Background

Green diesel is a promising alternative as a petroleum replacement given the worldwide demand for petroleum fuel. Environmental issues have drawn public attention and concerns towards advancing renewable energy development. A catalytic deoxygenation (deCOx) was carried out to produce green diesel from soybean oil (SO) using a low-cost NiO-doped calcined dolomite (NiOCD) catalyst.

Method

The structure, chemical composition and morphology of NiOCD were comprehensively characterized by XRF, BET, TPD-CO₂, SEM and TEM. In this study, the effect of two operating parameters, reaction temperature and flow rate of nitrogen, was discovered using a one-factor-at-a-time (OFAT) optimisation study. In addition, the life cycle cost analysis (LCCA) of stepwise catalyst preparation and green diesel production has been performed.

Significant findings

An optimal reaction temperature of 420 °C was found to provide the highest yield of green diesel (47.13 wt.%) with an 83.51% hydrocarbon composition. The ideal nitrogen flow rate, however, was found to be 50 cm³/min, which produced 41.80 wt.% of green diesel with an 88.63% hydrocarbon composition. The deoxygenation reaction was significantly impacted by both reaction temperature and nitrogen flow rate. According to LCCA, NiOCD catalyst has potential to lower the overall cost of producing green diesel compared to commercial zeolite catalysts.

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催化脱氧反应温度和 N2 气体流速对大豆脂肪酸转化为绿色柴油的影响

背景鉴于全球对石油燃料的需求，绿色柴油是一种很有前途的石油替代品。环境问题引起了公众对可再生能源发展的关注和关切。方法通过 XRF、BET、TPD-CO2、SEM 和 TEM 对 NiOCD 的结构、化学成分和形态进行了全面表征。本研究采用一次一因素（OFAT）优化法研究了反应温度和氮气流速这两个操作参数的影响。重要发现最佳反应温度为 420 °C，绿色柴油产量最高（47.13 wt.%），碳氢化合物含量为 83.51%。理想的氮气流速为 50 cm3/min，可产生 41.80 wt.%的绿色柴油，碳氢化合物含量为 88.63%。脱氧反应受反应温度和氮气流速的影响很大。根据 LCCA，与商用沸石催化剂相比，NiOCD 催化剂有望降低生产绿色柴油的总体成本。

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来源期刊

Journal of the Taiwan Institute of Chemical Engineers 工程技术-工程：化工

CiteScore

9.10

自引率

14.00%

发文量

362

审稿时长

35 days

期刊介绍： Journal of the Taiwan Institute of Chemical Engineers (formerly known as Journal of the Chinese Institute of Chemical Engineers) publishes original works, from fundamental principles to practical applications, in the broad field of chemical engineering with special focus on three aspects: Chemical and Biomolecular Science and Technology, Energy and Environmental Science and Technology, and Materials Science and Technology. Authors should choose for their manuscript an appropriate aspect section and a few related classifications when submitting to the journal online.