Department of Environment and Energy, Sejong University, Seoul 05006, Republic of Korea; Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China.
Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China.
Bioresour Technol. 2018 Dec;270:346-351. doi: 10.1016/j.biortech.2018.09.046. Epub 2018 Sep 10.
Thermochemical conversion of cobalt (Co)-loaded lignin-rich spent coffee grounds (COSCG) was carried out to find the appropriate pyrolytic conditions (atmospheric gas and pyrolytic time) for syngas production (H and CO) and fabricate Co-biochar catalyst (CBC) in one step. The use of CO as atmospheric gas and 110-min pyrolytic time was optimal for generation of H (∼1.6 mol% in non-isothermal pyrolysis for 50 min) and CO (∼4.7 mol% in isothermal pyrolysis for 60 min) during thermochemical process of COSCG. The physicochemical properties of CBC fabricated using optimized pyrolytic conditions for syngas production were scrutinized using various analytical instruments (FE-SEM, TEM, XRD, and XPS). The characterizations exhibited that the catalyst consisted of metallic Co and surface wrinkled carbon layers. As a case study, the catalytic capability of CBC was tested by reducing p-nitrophenol (PNP), and the reaction kinetics of PNP in the presence of CBC was measured from 0.04 to 0.12 s.
采用负载钴的富含木质素的废咖啡渣（COSCG）进行热化学转化，以找到合适的热解条件（气氛气体和热解时间）来生产合成气（H 和 CO），并一步制备 Co 生物炭催化剂（CBC）。在 COSCG 的热化学过程中，使用 CO 作为气氛气体和 110 分钟的热解时间，有利于 H（在 50 分钟的非等温热解中约为 1.6 mol%）和 CO（在 60 分钟的等温热解中约为 4.7 mol%）的生成。使用优化的合成气生产热解条件制备的 CBC 的物理化学性质使用各种分析仪器（FE-SEM、TEM、XRD 和 XPS）进行了仔细研究。表征表明，该催化剂由金属 Co 和表面褶皱的碳层组成。作为案例研究，通过还原对硝基苯酚（PNP）测试了 CBC 的催化能力，并从 0.04 到 0.12 s 测量了 PNP 在 CBC 存在下的反应动力学。
