School of Environmental Engineering, University of Seoul, Seoul, 02504, South Korea.
Department of BioEnvironmental Energy, Pusan National University, Miryang, 50463, South Korea.
Environ Res. 2020 May;184:109311. doi: 10.1016/j.envres.2020.109311. Epub 2020 Feb 26.
Catalytic co-pyrolysis (CCP) of spent coffee ground (SCG) and cellulose over HZSM-5 and HY was characterized thermogravimetrically, and a catalytic pyrolysis of two samples was conducted using a tandem micro reactor that directly connected with gas chromatography-mass spectrometry. To access the more fundamental investigations on CCP, the effects of the zeolite pore structure, reaction temperature, in-situ/ex-situ reaction mode, catalyst to feedstock ratio, and the SCG and cellulose mixing ratio were experimentally evaluated. The temperature showing the highest thermal degradation rate of cellulose with SCG slightly delayed due to the interactions during the thermolysis of two samples. HZSM-5 in reference to HY produced more aromatic hydrocarbons from CCP. With respect to the reaction temperature, the formation of aromatic hydrocarbons increased with the pyrolytic temperature. Moreover, the in-situ/ex-situ reaction mode, catalyst/feedstock, and cellulose/SCG ratio were optimized to improve the aromatic hydrocarbon yield.
用过的咖啡渣（SCG）和纤维素在 HZSM-5 和 HY 上的共热解（CCP）通过热重法进行了表征，并使用直接与气相色谱-质谱联用的串联微反应器对两种样品进行了催化热解。为了更深入地研究 CCP，实验评估了沸石孔结构、反应温度、原位/异位反应模式、催化剂与原料比以及 SCG 和纤维素混合比的影响。由于两种样品热解过程中的相互作用，纤维素与 SCG 共热解时显示最高热降解速率的温度略有延迟。与 HY 相比，HZSM-5 从 CCP 中产生了更多的芳烃。就反应温度而言，芳烃的形成随着热解温度的升高而增加。此外，优化了原位/异位反应模式、催化剂/原料比和纤维素/SCG 比，以提高芳烃收率。
