Preparation of Ni-La/Al2O3-CeO2-Bamboo Charcoal Catalyst and its Application in Co-pyrolysis of Straw and Plastic for Hydrogen Production

2021 ◽  
Author(s):  
YiRan Zhang ◽  
Jianfen Li ◽  
Bolin Li ◽  
Zeshan Li ◽  
Yun He ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Carbon Deposition ◽  
Stability Test ◽  
Quartz Tube ◽  
Bamboo Charcoal ◽  
Mixing Ratio ◽  
Mass Ratio ◽  
Pyrolysis Process ◽  
Pyrolysis Furnace ◽  
Combustible Gases

Abstract The developed Ni-La/Al2O3-CeO2-Bamboo charcoal (ACB) catalyst was applied to the co-pyrolysis of straw and plastic to produce hydrogen in a horizontal quartz tube pyrolysis furnace. In this study, the effects of the mixing ratio of straw and plastic, the presence and stability of the catalyst on the co-pyrolysis hydrogen production were investigated. Experiment showed that the addition of PE can increase the yield of H2 within a certain range, and the best mass ratio of 5:5 was found. In the co-pyrolysis process with the participation of the catalysts, the macromolecular tar can be cracked into combustible gases such as H2, and the H2 yield could be increased to 332.2ml/g (Ni-La/ACB) is much higher than 68.87ml/g without catalyst. Compared with Ni/ACB, Ni-La/ACB had been increased the alkalinity by adding La element and enhanced the carbon deposition resistance of the catalyst, which makes the catalyst maintain higher stability. This was also confirmed in stability test experiments.

Carbon Dioxide Reforming of Methane over Ni/Mo/La2O3-SBA-15 Сatalyst

2012 ◽  
Vol 455-456 ◽  
pp. 960-965
Author(s):  
Jian Huang ◽  
T. Huang ◽  
A. Rongzhang ◽  
Wei Huang ◽  
Ren Xiong Ma
Keyword(s):  
Carbon Dioxide ◽  
Strong Interaction ◽  
Carbon Deposition ◽  
Catalytic Performance ◽  
Stability Test ◽  
X Ray Diffraction ◽  
Carbon Dioxide Reforming ◽  
X Ray ◽  
Long Term Stability

Carbon dioxide reforming of methane over Ni/Mo/ La2O3-SBA-15 was studied. The catalyst was characterized by N2 adsorption, X-ray diffraction, H2-TPR,CO2-TPD and TG-GTA analysis. The results indicated that the introduction of an appropriate amount of La2O3 exhibited a higher activity and stability. In the long term stability test, La2O3 impregnated Ni/Mo-SBA-15 gave the highest conversion and stable activity at 800°C for 250 h. The effect of La was suggested to be due to its lower tendency to carbon deposition. Characterization results showed a strong interaction between La and Mo or Ni which facilitated the improvement of catalytic performance.

A Model for Carbon Deposition During Hydrogen Production by the Steam Reforming of Bio-oil

2013 ◽  
Vol 36 (3) ◽  
pp. 250-258 ◽  
Author(s):  
P. Lan ◽  
Q.-L. Xu ◽  
L.-H. Lan ◽  
Zh.-W. Ren ◽  
S.-P. Zhang ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Steam Reforming ◽  
Carbon Deposition ◽  
Bio Oil

Simulation and Study on Texaco Gasification of Semi-Cokes Prepared by DG Coal Pyrolysis Process

2012 ◽  
Vol 557-559 ◽  
pp. 2189-2196
Author(s):  
Hui Feng Yuan ◽  
De Min He ◽  
Jun Guan ◽  
Qiu Min Zhang
Keyword(s):  
Raw Materials ◽  
Sensitivity Study ◽  
Coal Pyrolysis ◽  
Mass Ratio ◽  
Pyrolysis Process ◽  
Mass Percentage ◽  
Operational Conditions ◽  
Water Slurry ◽  
Gasification Process ◽  
Process Simulations

Simulation and study on Texaco gasification of semi-cokes prepared by DG coal pyrolysis process has been carried out by using Aspen Plus. The possibility that pyrolytic semi-cokes is used as the raw materials is discussed. Sensitivity study runs are performed to analyze the effects of oxygen-to-char mass ratio, mass percentage of char in char water slurry and gasification pressure on the gasification process. Simulations indicate that molar percent content of effective components (CO+H2) reaches as high as 67.94% under operational conditions which oxygen-to-char mass ratio is 0.75; char water slurry concentration is 62.5% and gasification pressure is 4.0MPa. So semi-cokes made by DG coal pyrolysis process is the excellent raw materials for gasification. Sensitivity analysis show that oxygen-to-char mass ratio and mass percentage of char in char water slurry are the main factors that affect the gasification process; gasification pressure has little effect on the results of char gasification.

Coal and Wood Chips Co-Pyrolysis Study

2014 ◽  
Vol 960-961 ◽  
pp. 422-426
Author(s):  
Qi Min Wang ◽  
Hao Wang ◽  
Jia Hao ◽  
Shuo Guo
Keyword(s):  
Renewable Energy ◽  
High Temperature ◽  
Environmental Pollution ◽  
Wood Chips ◽  
Mass Ratio ◽  
Pyrolysis Process ◽  
Biomass Utilization ◽  
Rational Use ◽  
Pyrolysis Reaction ◽  
Energy Shortage

As a clean, renewable energy, rational use of biomss can effectively solve the problem of energy shortage and environmental pollution. Co-combustion and Co-gasification of biomass and coal are important ways of biomass utilization. Co-pyrolysis reaction is one of the most important processes in the co-combustion and co-gasification. In order to study the different mix ways of coal and wood chips affections on the co-pyrolysis process, TGA was used to study the co-pyrolysis characters of wood chips and coal mixed by different methods with mass ratio 1:1. it is founded out that there is certain interaction between wood chips and coal by the comparison of TGA curves and calculation curves. There is promoting affection at the high temperature if wood chips and coal had been mixed up. There is inhibiting affection if wood chips and coal are tiering distributed.

The relation between carbon deposition and hydrogen production in glycerol steam reforming

2015 ◽  
Vol 40 (35) ◽  
pp. 11840-11847 ◽  
Author(s):  
Yoo-Jin Go ◽  
Gwang-Sub Go ◽  
Hong-Joo Lee ◽  
Dong-Ju Moon ◽  
Nam-Cook Park ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Steam Reforming ◽  
Carbon Deposition

Hydrogen production by auto-thermal reforming of ethanol over Ni catalyst supported on ZrO2 prepared by a sol–gel method: Effect of H2O/P123 mass ratio in the preparation of ZrO2

2009 ◽  
Vol 146 (1-2) ◽  
pp. 57-62 ◽  
Author(s):  
Min Hye Youn ◽  
Jeong Gil Seo ◽  
Ji Chul Jung ◽  
Sunyoung Park ◽  
Dong Ryul Park ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Sol Gel ◽  
Ni Catalyst ◽  
Mass Ratio ◽  
Gel Method ◽  
Sol Gel Method ◽  
Method Effect

Thermoeconomic Analysis of Integrated Systems for Electricity and Hydrogen Production

2008 ◽  
Author(s):  
A. Franzoni ◽  
L. Galanti ◽  
A. Traverso ◽  
A. F. Massardo
Keyword(s):  
Power Plant ◽  
Hydrogen Production ◽  
Pem Fuel Cells ◽  
Economic Modelling ◽  
Engine Fuel ◽  
Pyrolysis Process ◽  
Steam Power ◽  
Detailed Model ◽  
Steam Power Plant ◽  
Syngas Production

This paper describes and compares the results of thermodynamic and economic modelling based on integrating an existing large size steam power plant (ENEL’s Brindisi power plant-660 MWe) with hydrogen production and purification plants. ENEL is one of the main Italian power utility. The high quality of the hydrogen produced would guarantee its usability for distributed generation (e.g. by micro gas turbine, Stirling engine, fuel cell, etc.) and also for public transport (using PEM fuel cells). The proximity of an hydrogen production and purification plant to an existing steam power plant can favour connections in terms of energy requirements exchanges; the integrated system, proposed here, can represent an attractive approach to a flexible hydrogen-electricity co-production. Two different technologies for the syngas production section are considered: the pyrolysis process and direct pressurised gasification. These technologies produce syngas with different characteristics in terms of temperature, pressure and composition: this has a profound effect on the layout of the complete systems proposed in this paper. The model for the pyrolysis process is based on an existing 800 kWt coal- and biomass-fed pyrolysis ENEL’s plant placed in Bastardo (Perugia, Italy): a detailed model of the plant was created. Different coals (Ashland, South Africa, Sulcis) and biomass (Poplar, Mischantus, Wood residuals, Husk) are considered in this study to explore the real potential of mixed-fuels in terms of thermodynamic performances and costs. The results were obtained using WTEMP software, developed by the TPG of the University of Genoa, showing the performance attainable by integrating a real steam power plant with systems for hydrogen production and purification for a novel vision of clean distributed hydrogen generation.

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