Synergistic effects between Cu and Ni species in NiCu/γ-Al2O3 catalysts for hydrodeoxygenation of methyl laurate
发布时间：2024-11-30
点击次数：
- 影响因子：
- 8.001
- DOI码：
- 10.1016/j.renene.2020.02.099
- 所属单位：
- 重庆工商大学
- 教研室：
- 废油资源化技术与装备教育部工程研究中心
- 发表刊物：
- Renewable Energy
- 项目来源：
- 重庆市科技局，重庆工商大学，重庆市教育委员会
- 关键字：
- Mesoporous NixCuy/g-Al2O3 catalyst；Electronic effect；Pore structure；Hydrodeoxygenation；Methyl laurate
- 摘要：
- Cu was introduced into Ni/γ-Al2O3 to prepare mesoporous NixCuy/γ-Al2O3 catalysts with different Ni and Cu contents. H2-TPR, XRD, BET, H2-TPD, and in-situ XPS were used to study the physicochemical properties of the prepared NixCuy/γ-Al2O3 catalysts. The catalytic performances of NixCuy/γ-Al2O3 catalysts were evaluated by methyl laurate catalytic hydrodeoxygenation (HDO) reaction. The NixCuyO/γ-Al2O3 precursors can be reduced to Ni0, Cu0, and NiCu alloy active species by H2 at 420°C. Formed NiCu alloy can effectively promote the electronic effect between Ni and Cu, and enhance the adsorption and activation abilities of the corresponding catalyst for the reactant molecules. The Ni active sites preferentially catalyzes the decarbonylation/carboxyl (DCO) reaction in the deoxygenation of methyl laurate, while the HDO pathway is predominant on the Cu active sites. The deoxygenation pathway obviously changes from DCO to HDO at the mole ratio of Ni/Cu lower than 3/7, and the main deoxygenation products change from C11 to C12 alkane. At the H2/Oil ratio of 500N, the space velocity (SV) of 1.5 h−1, H2 pressure(P) of 2 MPa, and the reaction temperature of 380°C, the Ni3Cu7/γ-Al2O3 catalyst shows the best methyl laurate DCO properties. And methyl laurate conversion and the main deoxygenation products C11 alkane selectivity can reach 98.3 and 87.4%, respectively. Moreover, Ni3Cu7/γ-Al2O3 catalyst also exhibits good stability.
- 第一作者：
- Caixia Miao
- 合写作者：
- Shuang Chen,Hongmei Xie
- 论文类型：
- 源刊论文
- 通讯作者：
- Guilin Zhou,Xianming Zhang
- 学科门类：
- 工学
- 文献类型：
- Journal Article
- 卷号：
- 153
- 页面范围：
- 1439–1454
- 是否译文：
- 否
- 发表时间：
- 2020-06-01
- 收录刊物：
- SCI