Article
Chemistry, Physical
Jacob Chicano, Connor T. Dion, Ugur Pasaogullari, Julia A. Valla
Summary: This study focuses on analyzing a 12-bed vacuum pressure-swing adsorption (VPSA) process for purifying hydrogen from a ternary mixture derived from methanol-steam reforming. Results show that the 12-bed VPSA process can achieve high purity hydrogen production with a recovery rate of up to 75.75%, while a 4-bed VPSA process can achieve the same purity goals but with a lower hydrogen recovery rate.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Thermodynamics
Hongsheng Wang, Rufan Yang, Bingzheng Wang, Zenghao Wei, Hui Kong, Xiaofei Lu, Jian Jin
Summary: In this study, a thermodynamic analysis of solar-driven methanol steam reforming reaction in a Pd-Ag membrane reactor was conducted. The results showed that, under optimized reaction conditions, the conversion rate of methanol reached high levels and purified hydrogen and carbon dioxide could be collected separately. Due to the use of solar energy and the membrane reactor, it is predicted that significant coal and carbon dioxide savings can be achieved.
APPLIED THERMAL ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Kuerbangnisha Kadeer, Xingguo Li, Jie Zheng
Summary: Methanol steam reforming (MSR) and hydrolysis of metal hydrides are two important hydrogen generation reactions that can complement each other. Combining these reactions can improve hydrogen generation performance. The CO2 produced from MSR can be absorbed by the hydroxide generated from hydrolysis, resulting in higher H2 purity. The heat from hydrolysis can be used to drive the endothermic MSR reaction. By conducting MSR on a CaH2-CuO composite, a hydrogen density of 6.56 wt% based on all reactants with H2 purity higher than 99% can be achieved at 250 degrees Celsius.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Xuelian Chen, Zhaochi Feng, Dongyuan Zhao, Qihua Yang, Can Li
Summary: A ZnCeZrOx catalyst has been developed for stable steam reforming of methanol at 400 degrees C. The catalyst exhibits high H2 production rates and methanol conversion rates, indicating enhanced activity and stability.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
Article
Engineering, Environmental
Konstantinos Kappis, Joan Papavasiliou, Marcin Kusmierz, Grzegorz Slowikc, Yifan Li, Haibin Li, Wojciech Gac, George Avgouropoulos
Summary: Steam reforming of methanol using CuZnOx catalysts was investigated, and the incorporation of Ga was found to improve catalyst performance by altering the environment and promoting the formation of ZnGa2O4 spinels and oxygen vacancies. The presence of Ga2O3 (15 wt%) was beneficial for activity and selectivity, and the formation of a CuZnGaAlOx system further enhanced the performance. The most active material showed promising results in an integrated internal reforming methanol fuel cell operating at 220 degrees C.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Caroline Teixeira Rodrigues, Gabriela de Franca Lopes, Christian Goncalves Alonso, Luiz Mario de Matos Jorge, Paulo Roberto Paraiso
Summary: Studies on the integration of reforming systems with Fuel Cells are intriguing for energy production in remote areas. The development of multi-fuel processors that can utilize various fuels without modifying the unit is particularly interesting. This study modeled and simulated an Autonomous Fuel Cell (AFC) system with methanol and/or Dimethyl Ether Steam Reforming (SR) using Aspen Plus. The evaluation focused on process variables, operational conditions, and the need for additional processes.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Abdulrahman Almithn, Zaid Alhulaybi
Summary: This study presents a mechanistic investigation of methanol decomposition and MSR pathways on Ni2P catalyst using density functional theory calculations. The results suggest that MSR can compete with methanol decomposition on Ni2P, unlike other transition metals which primarily generate CO rather than CO2.
Article
Chemistry, Physical
Shun Liu, Yuying Yang, Zhihua Ge, Lijun Yang, Xiaoze Du
Summary: A multi-stage PCM filling reactor was designed to address the issue of solar energy fluctuation, showing that lower phase change temperature and more latent heat PCM can improve chemical performance, while higher phase change temperature PCM is needed for better performance when releasing latent heat. Multi-stage PCMs arrangement outperforms single PCM filling, achieving maximum methanol conversion improvements.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Hyunjin Ji, Junghun Lee, Eunyeong Choi, Jang-hyeon Cho
Summary: The study found that adding hydrogen peroxide (H2O2) to methanol reforming reactions at low temperatures can increase methanol conversion and hydrogen production, especially when methanol conversion is low. Additionally, the results showed that the addition of H2O2 did not significantly decrease the durability of the catalyst.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Engineering, Environmental
Weiqin Lu, Rongjun Zhang, Sam Toan, Ran Xu, Feiyi Zhou, Zhao Sun, Zhiqiang Sun
Summary: The study evaluated the impact of four different microchannel structures on the performance of methanol steam reforming, with the integrated structure incorporating sinusoidal waves and dimples demonstrating the best overall performance. Enhanced heat and mass transportation, as well as improved H2 production capacity, were observed in the integrated structure.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Energy & Fuels
Tianqing Zheng, Wei Zhou, Yifan Yang, Yuchen Zhong, Huihui You, Xinying Li, Xuyang Chu, Kwan San Hui, Weihua Ding
Summary: A novel approach using nickel foam with multiple microchannels as combustion reaction support in self-heating methanol steam reforming microreactor was proposed. Numerical simulations and experimental results show that this design can effectively improve hydrogen production performance, reduce temperature difference, and maximum temperature.
Article
Chemistry, Physical
Peijian Yan, Jiahao Yan, Xinhai Yu, Pengfei Tian, Shenghu Zhou, Shan -Tung Tu
Summary: In this study, a PdZn@ZnO catalyst was synthesized using thermal treatment and H2 reduction to enhance the anti-oxidation and anti-sintering abilities of proton exchange membrane fuel cells (PEMFCs) powered vehicles using on-board H2 production by methanol steam reforming (SRM). The PdZn@ZnO catalyst showed excellent anti-oxidation ability and stability, indicating great potential for on-board hydrogen production in PEMFC-powered vehicles.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Orhan Ozcan, Ayse Nilgun Akin
Summary: This study investigates the kinetics of methanol steam reforming (MSR) using a commercial catalyst (CuO/ZnO/Al2O3) in a once-through flow reactor. The effects of methanol and water partial pressures on the reaction rate were examined. A power rate law was utilized to describe the experimental data, and a non-linear regression analysis revealed reaction orders of 0.29 for methanol and 0.09 for water, with a frequency factor of 53.48 (molCH3OH s-1 gcatalyst-1 kPa-0.38) and an activation energy of 65.59 kJ mol-1. Additionally, a simulation study was conducted to analyze the rate equation of an integrated system, which showed the potential to produce 15 W power output.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Taisei Akagi, Naoki Ikenaga
Summary: In this study, we investigated the introduction of various metal ion species into calcined NiCuAl-LDH using a chelating agent. The highest methanol conversion rate achieved was 82.6% with an H2 yield of 53.5%. The presence of Ni(OH)2 and Cu(OH)2 on the catalyst surface was found to have a positive effect on the MSR.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Energy & Fuels
Yancheng Wang, Qiong Wu, Deqing Mei, Yidong Wang
Summary: A new methanol fuel processing system (MFPS) has been developed to produce CO-free hydrogen rich steam for the supply of PEMFC, generating approximately 100 watts of electricity successfully.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Energy & Fuels
Peng Ren, Pucheng Pei, Dongfang Chen, Yuehua Li, Ziyao Wu, Lu Zhang, Zizhao Li, Mingkai Wang, He Wang, Bozheng Wang, Xizhong Wang
Summary: This paper proposes a novel analytic method for MEA parameters using micro-current excitation, which allows for the simultaneous calculation of key parameters without the need for high sampling frequency and data filtering of voltage signals. The effects of operating conditions on MEA parameters, as well as the impact of relative humidity on hydrogen crossover, are further investigated in this study.
