Syngas production by dry reforming of the mixture of glycerol and ethanol with CaCO3
Syngas production by dry reforming of the mixture of glycerol and ethanol with CaCO3
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DOI：
10.1016/j.jechem.2019.08.002
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发表时间：
2020-04-01
影响因子：
13.1
通讯作者：
Yu, Hao
中科院分区：
文献类型：
--
作者：
Dang, Chengxiong;Wu, Shijie;Yu, Hao
减少二氧化碳排放对于减缓气候变化至关重要。大量工业二氧化碳可以通过高温吸附过程以碳酸盐的形式被吸收。在这方面，碳酸盐有效转化为增值产品将为碳化合物的可持续利用提供经济上可行的方法。在此，我们报告了一种有前途的解决方案，涉及在干重整过程中使用甘油和乙醇混合物作为氢供体，用 CaCO3 生产合成气。一系列金属活性成分，包括Ni、Fe、Co、Cu、Pt、Pd、Ru和Rh，被用来促进该反应。 Ni 的性能与 Pd 相当，但优于 Co、Fe、Cu、Rh、Ru 和 Pt。在含有 10 wt% Ni (10Ni-CaCO3) 的 CaCO3 上，甘油和乙醇的转化率约为 100%，合成气（H-2 和 CO）的选择性约为 92%，H-2/CO 比率约为 1.2。同时，CO2浓度低于5vol%，表明碳酸盐捕获的大部分CO2可以转化为化学品；然而，它们不能简单地被排放。 CaCO3分解释放的CO2不仅调节了H-2与CO的比例，而且消除了焦炭，保证了CO2吸收转化在无蒸汽和高温下的循环稳定性。 (C) 2019 科学出版社、中国科学院大连化学物理研究所。由 Elsevier B.V. 和科学出版社出版。版权所有。
The reduction of CO2 emission is crucial for the mitigation of climate change. A considerable amount of industrial CO2 can be absorbed in the form of carbonates through high-temperature sorption processes. In this regard, the efficient conversion of carbonates to value-added products will provide an economically viable method for the sustainable usage of carbon compounds. Herein, we report a promising solution involving the use of a glycerol and ethanol mixture as a hydrogen donor in the dry reforming process with CaCO3 to produce syngas. A series of metal active components, including Ni, Fe, Co, Cu, Pt, Pd, Ru, and Rh, was used to promote this reaction. Ni showed comparable performance with that of Pd, but outperformed Co, Fe, Cu, Rh, Ru, and Pt. Approximately 100% conversion of glycerol and ethanol, similar to 92% selectivity of synthesis gas (H-2 and CO), and a H-2/CO ratio of similar to 1.2 were achieved over CaCO3 containing 10 wt% Ni (10Ni-CaCO3). Meanwhile, the CO2 concentration was less than 5 vol%, indicating that most of the CO2 captured by the carbonate can be transformed into chemicals; however, they cannot simply be emitted. The CO2 released from the decomposition of CaCO3 not only adjusted the ratio of H-2 to CO but also eliminated cokes to guarantee the CO2 absorption-conversion cyclic stability in the absence of steam and at high temperatures. (C) 2019 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. and Science Press. All rights reserved.