Department of Chemical Engineering, Faculty of Engineering, Afyon Kocatepe University, 03200, Afyonkarahisar, Turkey.
Environ Sci Pollut Res Int. 2023 Nov;30(54):115037-115049. doi: 10.1007/s11356-023-30527-3. Epub 2023 Oct 25.
This study aims to produce beneficial products with pomegranate peel waste through pyrolysis. For this purpose, the usability of the liquid product as a biofuel and the solid product as an adsorbent for dye removal was investigated. To characterize the bio-oil and biochar produced under the best pyrolysis conditions, Fourier transforms infrared spectroscopy (FT-IR), Gas chromatography-mass spectrometry (GC-MS), calorific value, Brunauer-Emmett-Teller (BET), and Scanning electron microscopy (SEM) analyses were conducted. When we examine the FT-IR spectrum of the bio-oil, the presence of phenol, alcohol, ketone, and aldehyde groups is seen in the structure. The GC-MS analysis demonstrated that phenol content was 27.9%, aldehyde content was 19%, acid compound content was 18.28%, ketone content was 8.7%, and aromatic compound content was 8.4%. The lower calorific value of bio-oil was determined as 27.33 MJ/kg. It was observed that activated carbon produced from biochar at a 3:1 KOH/biochar impregnation ratio and a carbonization temperature of 800 °C exhibited the highest surface area (1307 m/g). In adsorption analysis, it was observed that the adsorption efficiency was higher at pH 9 and 35 °C and with 150 ppm initial concentration. Langmuir and Freundlich adsorption isotherms were determined, and the high R (0.99) was consistent with the Langmuir methylene blue (MB) adsorption model.
本研究旨在通过热解从石榴皮废物中生产有益产品。为此，研究了液体产物作为生物燃料和固体产物作为染料去除吸附剂的可用性。为了对最佳热解条件下产生的生物油和生物炭进行表征，进行了傅里叶变换红外光谱（FT-IR）、气相色谱-质谱联用（GC-MS）、热值、BET 和扫描电子显微镜（SEM）分析。当我们检查生物油的 FT-IR 光谱时，可以看到结构中存在酚、醇、酮和醛基团。GC-MS 分析表明，酚含量为 27.9%，醛含量为 19%，酸类化合物含量为 18.28%，酮含量为 8.7%，芳烃化合物含量为 8.4%。生物油的低热值确定为 27.33 MJ/kg。观察到在 3:1 KOH/生物炭浸渍比和 800°C 的碳化温度下由生物炭制成的活性炭表现出最高的表面积（1307 m/g）。在吸附分析中，观察到在 pH 9 和 35°C 以及初始浓度为 150ppm 的条件下，吸附效率更高。确定了 Langmuir 和 Freundlich 吸附等温线，高 R（0.99）与 Langmuir 亚甲基蓝（MB）吸附模型一致。
