TY - JOUR
T1 - Pt supported on modified-coal gasification slag for efficient dehydrogenation of methylcyclohexane in a fixed bed reactor
AU - Dai, Xiaomin
AU - Wang, Juan
AU - Guo, Huan
AU - Xu, Yunhua
AU - Bai, Jing
AU - Ren, Wenchen
AU - Chen, Mengchi
AU - Zhu, Xunjin
AU - Wang, Wenliang
AU - Zhang, Zhao
AU - Chang, Hui
N1 - This work was supported by Scientific Research Program Funded by Education Department of Shaanxi Provincial Government (23JK0760), Shenmu Science and Technology Program Project (2023-G-21), Shaanxi Provincial Science and Technology Department Regional Innovation Capacity Guidance Plan (2022QFY06-08), Yulin City science and technology Bureau major special project (2024-ZDZX-002), National Natural Science Foundation of China (22171170, 21703131), Joint Fund of the Yulin University and the Dalian National Laboratory for Clean Energy (Grant. YLU-DNL Fund 2022007), Yulin Science and Technology Program Project (2023-CXY-136).
Publisher Copyright:
© 2024 Hydrogen Energy Publications LLC
PY - 2024/11/11
Y1 - 2024/11/11
N2 - Coal gasification slag (CGS) was used for modification and loaded platinum (Pt) to liquid organic hydrogen carrier (LOHC) for the first time. The carbon hybrid silica (C/SiO2) was prepared by removing metal oxides and carbon residue of CGS through acid treatment and calcination. The C/SiO2 loaded Pt (Pt-C/SiO2) exhibited only a 1.3% decrease in dehydrogenation conversion rate after 30 h of continuous catalytic dehydrogenation of methylcyclohexane (MCH), and even after 100 h, the decrease was only 4.9%. When Pt was directly loaded on CGS (Pt-CGS), it showed higher catalytic activity (dehydrogenation conversion rate was 20.4%), but lower catalytic stability (dehydrogenation conversion rate decreased by 56% after 7 h). Additionally, commercial Pt-SiO2 catalysts exhibited poor dehydrogenation conversion rate, significantly lower than that of Pt-C/SiO2. Density functional theory calculations confirmed the influence of carbon hybrid SiO2 on the adsorption energy, electron transfer and density of states for the catalytic dehydrogenation of MCH. The highly active and stable Pt-C/SiO2 catalyst can be effectively utilized for LOCH while achieving high-value utilization of CGS solid waste.
AB - Coal gasification slag (CGS) was used for modification and loaded platinum (Pt) to liquid organic hydrogen carrier (LOHC) for the first time. The carbon hybrid silica (C/SiO2) was prepared by removing metal oxides and carbon residue of CGS through acid treatment and calcination. The C/SiO2 loaded Pt (Pt-C/SiO2) exhibited only a 1.3% decrease in dehydrogenation conversion rate after 30 h of continuous catalytic dehydrogenation of methylcyclohexane (MCH), and even after 100 h, the decrease was only 4.9%. When Pt was directly loaded on CGS (Pt-CGS), it showed higher catalytic activity (dehydrogenation conversion rate was 20.4%), but lower catalytic stability (dehydrogenation conversion rate decreased by 56% after 7 h). Additionally, commercial Pt-SiO2 catalysts exhibited poor dehydrogenation conversion rate, significantly lower than that of Pt-C/SiO2. Density functional theory calculations confirmed the influence of carbon hybrid SiO2 on the adsorption energy, electron transfer and density of states for the catalytic dehydrogenation of MCH. The highly active and stable Pt-C/SiO2 catalyst can be effectively utilized for LOCH while achieving high-value utilization of CGS solid waste.
KW - Carbon hybrid silica
KW - Coal gasification slag
KW - High-value utilization
KW - Liquid organic hydrogen carrier
KW - Methylcyclohexane
UR - http://www.scopus.com/inward/record.url?scp=85205508646&partnerID=8YFLogxK
U2 - 10.1016/j.ijhydene.2024.09.453
DO - 10.1016/j.ijhydene.2024.09.453
M3 - Journal article
AN - SCOPUS:85205508646
SN - 0360-3199
VL - 90
SP - 409
EP - 418
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
ER -
