Conversion of levulinic acid and cellulose to γ-valerolactone over Raney-Ni catalyst using formic acid as a hydrogen donor
Conversion of levulinic acid and cellulose to γ-valerolactone over Raney-Ni catalyst using formic acid as a hydrogen donor
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DOI：
10.1080/17597269.2018.1489673
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发表时间：
2021-04-21
期刊：
影响因子：
2.1
通讯作者：
Wiredu, Bernard
中科院分区：
文献类型：
--
作者：
Amarasekara, Ananda S.;Maroney Lawrence, Yen;Wiredu, Bernard
研究了乙酰丙酸（LA）和纤维素（DP约为450）在Raney-Ni催化剂上转化为γ-戊内酯（GVL）。在该方法中，使用甲酸（FA）作为氢供体完成氢化。使用LA：FA 1：4比率、Raney-Ni催化剂（20 mg/mmol LA）和在200 ℃下加热48 h获得最高LA转化率（100%）和GVL产率（68.5%）。在类似的反应条件下，纤维素（DP类似于450）在单反应器方法中以23.3%的产率转化为GVL。向反应混合物中加入酸性助催化剂如布朗斯台德酸：H2SO 4、Amberlyst-15（H+）或Dowex 50 WX 8没有提高GVL产率。纤维素转化为GVL的Raney Ni催化剂的SEM分析表明，在单反应器工艺中，催化剂表面被碳沉积物污染。
The present study aimed to investigate the conversion of levulinic acid (LA) and cellulose (DP similar to 450) to gamma-valerolactone (GVL) over Raney-Ni catalyst. In this process, hydrogenation was fulfilled using formic acid (FA) as the hydrogen donor. The highest LA conversion (100%) and GVL yield (68.5%) were obtained using LA:FA 1:4 ratio, Raney-Ni catalyst (20 mg/mmol of LA) and heating at 200 degrees C for 48 h. Under similar reaction conditions cellulose (DP similar to 450) was converted into GVL in 23.3% yield in a single reactor process. The addition of acidic co-catalysts such as Bronsted acids: H2SO4, Amberlyst-15 (H+) or Dowex 50WX8 to the reaction mixture did not improve the GVL yield. The SEM analysis of the Raney Ni-catalyst used in transformation of cellulose to GVL showed that catalyst surface gets contaminated with carbon deposits in the single reactor process.