混合氧酸原料的催化升级,来源于卡夫特黑酒
Opeyemi A Ojelade1, Qiang Fu1, Sankar Nair1
1School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0100, United States.
研究人员探索了将纸和纸张废弃物的氧酸升级为有价值的化学物质. 在氧化催化剂上的能有效地将这些酸转化为碳酸酸,这是可持续化学生产的有希望的一步.
科学领域:
- 催化剂是一种催化剂.
- 生物质转换生物质转换
- 可持续化学 可持续化学
背景情况:
- 纤维素原料是可持续燃料和化学品的关键.
- 来自纸和造纸行业的黑液 (BL) 含有适用于催化升级的氧酸 (HA).
研究的目的:
- 为了研究从卡夫特黑中提取的氧酸 (HAs) 的催化升级.
- 为了评估M/Nb2O5 (M = Pd,Pt,Rh,Ru) 催化剂用于HAs的氧化.
- 评估BL衍生HA的潜力,作为生产有价值的碳酸的平台.
主要方法:
- 模型 (葡萄糖酸) 和真实HA混合物的催化氧化,从 kraft BL.
- 使用M/Nb2O5催化剂 (M=Pd,Pt,Rh,Ru) 进行HA转化.
- 分析了产品选择性和反应条件,重点关注C-OH键裂变,同时保留-COOH组.
主要成果:
- Pd/Nb2O5表现出优越的活性和选择性,用于将模型HA转化为有价值的中间体,如挥发性碳酸和酸.
- 在支持的金属催化剂上转换HA显示了温度依赖的选择性.
- 一个0.25%的Pd/Nb2O5催化剂成功地从真正的BL衍生HA中产生了C3-C8碳酸,保留了碳酸基.
结论:
- 从 kraft黑液中催化升级氧酸是可行的.
- Pd/Nb2O5催化剂在选择性脱化HA中是有效的.
- 由BL衍生出的HA代表了生产混合碳酸盐用于进一步化学合成的可行平台.
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