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Up-cycling tomato pomace by thermochemical liquefaction – A response surface methodology assessment
Biomass & Bioenergy ( IF 6 ) Pub Date : 2021-12-11 , DOI: 10.1016/j.biombioe.2021.106324
Margarida Vidal 1 , David Bastos 1 , Luciana Silva 1 , Daniela Gaspar 1 , Ivo Paulo 1 , Sandro Matos 1 , Salomé Vieira 1 , João Moura Bordado 1 , Rui Galhano dos Santos 1
Affiliation  

Tomato pomace is a waste from the tomato processing industry, for which there are few solutions to upcycle it. The tomato pomace thermochemical liquefaction was modelated using response surface methodology, combined with central composite face-centred (CCF), obtaining a model with a high adjusted R-squared (0.97) and a very good p-value (less than 0.001). The liquefaction process was conducted for 1–5 h at temperatures ranging from 100 to 160 °C. The process was supported by an acid catalyst, p-toluene sulfonic acid, with concentrations from 0.5 to 3% w/w. The model suggested that the highest conversions are reached at 160 °C, for a catalyst concentration from 2.5% to 3%, and for processes lasting more than 3 h. The bio-oil obtained was characterized by FTIR-ATR, elemental analysis, thermogravimetric analysis, and the higher heating value was computed. The bio-oil’ HHV was estimated at 32.32 MJ/kg, 1.42 times higher than that of tomato pomace. The study indicates that thermochemical liquefaction can be a process to value the tomato pomace, turning it into bio-fuel or value-added chemicals.



中文翻译:

通过热化学液化对番茄渣进行上循环——响应面方法评估

番茄渣是番茄加工业的一种废物,几乎没有解决方案可以对其进行回收利用。番茄渣热化学液化使用响应面方法建模,结合中心复合面心 (CCF),获得具有高调整 R 平方 (0.97) 和非常好的 p 值 (小于 0.001) 的模型。液化过程在 100 至 160°C 的温度范围内进行 1-5 小时。该过程由酸催化剂对甲苯磺酸支持,浓度为 0.5 至 3% w/w。该模型表明,最高转化率在 160 °C 时达到,催化剂浓度为 2.5% 至 3%,过程持续时间超过 3 小时。获得的生物油通过 FTIR-ATR、元素分析、热重分析、并计算出较高的发热量。生物油的 HHV 估计为 32.32 MJ/kg,是番茄渣的 1.42 倍。该研究表明,热化学液化可以成为评估番茄渣价值的过程,将其转化为生物燃料或增值化学品。

更新日期:2021-12-11
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