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首页> 外文期刊>Chemical Engineering Research & Design: Transactions of the Institution of Chemical Engineers >Supercritical water gasification of glycerol and methanol mixtures as model waste residues from biodiesel refinery
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Supercritical water gasification of glycerol and methanol mixtures as model waste residues from biodiesel refinery

机译：甘油和超临界水气化甲醇混合物作为模型废渣生物柴油炼油厂

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The eco-friendly processing in biodiesel refineries is feasible with effective utilization of the byproducts and waste residues. The motive of this research is to convert the model byproducts of biodiesel refineries to H-2. In this study, different glycerol-methanol mixtures were gasified in supercritical water at variable temperatures (450-600 degrees C) and pressures (23-25 MPa) for 45 s in a continuous-flow tubular reactor. Glycerol and methanol concentrations were varied from 5 to 20 wt% individually in the mixtures, and their impacts on gas yields were investigated both experimentally and thermodynamically. The thermodynamic simulations were performed using Aspen Plus based on Gibbs free energy minimization method. The thermodynamic yield (25.3 mmoVg) of H-2 was higher compared to experimental yields (19 mmoVg) at 600 degrees C, 25 MPa and 1:1 glycerol-to-methanol feed solution. To enhance the gas yields, the effects of four alkali catalysts such as KOH, NaOH, K2CO3 and Na2CO3 at 0.5 wt% concentration were examined. Among all the catalyst, 0.5 wt% K2CO3 resulted in highest 1-12 yields (24.8 mmol/g), total gas yields (1.24 g/L) and carbon gasification efficiency (96.7%) at 600 degrees C and 25 MPa with 1:1 glycerol-to-methanol feed solution. The results suggest that effluents from biodiesel refineries can be used as potential feedstock for waste-to-energy conversion. (C) 2016 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
机译：生物柴油的环保处理炼油厂和有效利用是可行的的副产品和废物残留。本研究是将模型副产品的生物柴油炼油厂氢气2。这项研究中,不同glycerol-methanol混合物在超临界水气化变量吗温度(450 - 600摄氏度)和压力(第23 - 25 MPa) 45 s连续流管反应堆。从5到20 wt %的单独吗混合物,对天然气产量的影响调查和实验从热力学角度来看。基于吉布斯进行使用阿斯彭加自由能最小化的方法。热力学收益率(25.3 mmoVg) 2收益率高于实验(mmoVg 19日)在600摄氏度下,25 MPa, 1:1glycerol-to-methanol饲料的解决方案。天然气产量,四碱的影响如KOH催化剂氢氧化钠,K2CO3 Na2CO30.5 wt %浓度检查。催化剂,0.5 wt % K2CO3导致最高1 - 12收益率(24.8更易/ g),天然气总收益率(1.24g / L)和碳气化效率(96.7%)在600摄氏度和25 MPa 1:1glycerol-to-methanol饲料的解决方案。建议从生物柴油炼油厂废水可以作为潜在的原料吗废物转化为能源转换。化学工程师。保留所有权利。

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