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Influence of operating variables on the aqueous-phase reforming of glycerol over a Ni/Al coprecipitated catalyst
International Journal of Hydrogen Energy ( IF 8.1 ) Pub Date : 2018-10-11 , DOI: 10.1016/j.ijhydene.2018.09.119
L. García , A. Valiente , M. Oliva , J. Ruiz , J. Arauzo

A systematic study focused on the aqueous-phase reforming of glycerol has been carried out in order to analyze the influence of several operating variables (system pressure, reaction temperature, glycerol content in feed, liquid feeding rate and catalyst weight/glycerol flow rate ratio) on the gas and liquid products. A continuous flow bench scale installation and a Ni/Al coprecipitated catalyst were employed. The system pressure was varied from 28 to 40 absolute bar, the reaction temperature was analyzed from 495 to 510 K, the glycerol content in the feed was studied from 2 to 10 wt%, the liquid feeding rate was changed from 0.5 to 3.0 mL/min and the catalyst weight/glycerol flow rate ratio varied from 10 to 40 g catalyst min/g glycerol. The main gas products obtained were H2, CO2 and CH4, while the main liquid products were 1,2-propanediol, ethylene glycol, acetol and ethanol. A W/mglycerol ratio of 40 g catalyst min/g glycerol, 34 bar, 500 K, 5 wt% glycerol and 1 mL/min, resulted in a high yield to H2 (6.8%), the highest yield to alkanes (10.7%), the highest 1,2-propanediol yield (0.20 g/g glycerol) and the highest ethylene glycol yield (0.11 g/g glycerol). The highest acetol yield (0.06 g/g glycerol) was obtained at 34 bar, 500 K, 5 wt% glycerol, 20 g catalyst min/g glycerol and 3 mL/min.



中文翻译:

Ni / Al共沉淀催化剂上操作变量对甘油水相重整的影响

为了分析几个操作变量(系统压力,反应温度,进料中甘油含量,进料速率和催化剂重量/甘油流速比)的影响,进行了针对甘油水相重整的系统研究。在气体和液体产品上。使用连续流动台规模的设备和Ni / Al共沉淀催化剂。系统压力在28至40 bar的绝对压力之间变化,反应温度在495 K至510 K之间进行分析,进料中的甘油含量从2到10 wt%进行了研究,液体进料速率从0.5到3.0 mL /催化剂重量/甘油流速比为10分钟至40克催化剂分钟/克甘油。所获得的主要气体产物为H 2,CO 2和CH 4,而主要的液体产物是1,2-丙二醇,乙二醇,丙酮醇和乙醇。AW / m甘油比为40 g催化剂min / g甘油,34 bar,500 K,5 wt%甘油和1 mL / min,导致H 2的产率高(6.8%),烷烃的产率最高(10.7) %),最高的1,2-丙二醇产率(0.20 g / g甘油)和最高的乙二醇产率(0.11 g / g甘油)。在34 bar,500 K,5 wt%甘油,20 g催化剂min / g甘油和3 mL / min的条件下,可获得最高的丙酮醇收率(0.06 g / g甘油)。

更新日期:2018-10-11
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