Catalytic pyrolysis of pine needle biomass over Fe–Co–K catalyst for H2-rich syngas production: Influence of catalyst preparation

Energy ◽  
2021 ◽  
pp. 122602
Author(s):  
Jin Deng ◽  
Yujie Zhou ◽  
Yan Zhao ◽  
Lingshuai Meng ◽  
Tao Qin ◽  
...  
Keyword(s):  
Catalytic Pyrolysis ◽  
Catalyst Preparation ◽  
Pine Needle ◽  
Syngas Production

scholarly journals Insight into the Ex Situ Catalytic Pyrolysis of Biomass over Char Supported Metals Catalyst: Syngas Production and Tar Decomposition

Nanomaterials ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 1397 ◽  
Author(s):  
Mian Hu ◽  
Baihui Cui ◽  
Bo Xiao ◽  
Shiyi Luo ◽  
Dabin Guo
Keyword(s):  
Active Sites ◽  
Catalytic Pyrolysis ◽  
Supported Catalyst ◽  
Ex Situ ◽  
Molar Ratio ◽  
Ni Catalyst ◽  
Nitrogenous Compounds ◽  
Syngas Production ◽  
Valence States ◽  
Pyrolysis Of Biomass

Ex situ catalytic pyrolysis of biomass using char-supported nanoparticles metals (Fe and Ni) catalyst for syngas production and tar decomposition was investigated. The characterizations of fresh Fe-Ni/char catalysts were determined by TGA, SEM–EDS, Brunauer–Emmett–Teller (BET), and XPS. The results indicated that nanoparticles metal substances (Fe and Ni) successfully impregnated into the char support and increased the thermal stability of Fe-Ni/char. Fe-Ni/char catalyst exhibited relatively superior catalytic performance, where the syngas yield and the molar ratio of H2/CO were 0.91 Nm3/kg biomass and 1.64, respectively. Moreover, the lowest tar yield (43.21 g/kg biomass) and the highest tar catalytic conversion efficiency (84.97 wt.%) were also obtained under the condition of Ni/char. Ultimate analysis and GC–MS were employed to analyze the characterization of tar, and the results indicated that the percentage of aromatic hydrocarbons appreciably increased with the significantly decrease in oxygenated compounds and nitrogenous compounds, especially in Fe-Ni/char catalyst, when compared with no catalyst pyrolysis. After catalytic pyrolysis, XPS was employed to investigate the surface valence states of the characteristic elements in the catalysts. The results indicated that the metallic oxides (MexOy) were reduced to metallic Me0 as active sites for tar catalytic pyrolysis. The main reactions pathway involved during ex situ catalytic pyrolysis of biomass based on char-supported catalyst was proposed. These findings indicate that char has the potential to be used as an efficient and low-cost catalyst toward biomass pyrolysis for syngas production and tar decomposition.

The effect of industrial waste coal bottom ash as catalyst in catalytic pyrolysis of rice husk for syngas production

2018 ◽  
Vol 165 ◽  
pp. 541-554 ◽  
Author(s):  
Adrian Chun Minh Loy ◽  
Suzana Yusup ◽  
Man Kee Lam ◽  
Bridgid Lai Fui Chin ◽  
Muhammad Shahbaz ◽  
...  
Keyword(s):  
Rice Husk ◽  
Industrial Waste ◽  
Catalytic Pyrolysis ◽  
Bottom Ash ◽  
Coal Bottom Ash ◽  
Syngas Production ◽  
Waste Coal

scholarly journals Preparation of a Ni/LaAlO3 catalyst and its application in catalytic pyrolysis of soybean straw for syngas production

BioResources ◽  
2020 ◽  
Vol 15 (3) ◽  
pp. 5871-5885
Author(s):  
Zeshan Li ◽  
Weitao He ◽  
Tao Xiong ◽  
Yan Wang ◽  
Juanjuan Zhang ◽  
...  
Keyword(s):  
Calcination Temperature ◽  
Catalytic Pyrolysis ◽  
Raw Materials ◽  
Sol Gel ◽  
Holding Time ◽  
Precipitation Method ◽  
X Ray ◽  
Syngas Production ◽  
Loading Amount ◽  
Soybean Straw

A LaAlO3 carrier was prepared via the sol-gel method, and a Ni/LaAlO3 catalyst was prepared via the homogeneous precipitation method; this catalyst was used for the catalytic pyrolysis of soybean straw for syngas (H2 + CO) production. The analysis of the raw materials (straw) was performed via elemental analysis and industrial analysis. The support and catalyst were characterized and analyzed by X-ray fluorescence spectroscopy, thermogravimetric analysis, X-ray diffraction, scanning electron microscopy, and N2 adsorption-desorption isotherms. The results illustrated that the NiO was uniformly loaded on the LaAlO3 surface. Furthermore, the effects of the Ni loading amount, pyrolysis temperature, holding time, and calcination temperature on the performance of the catalyst were studied. The results showed that the catalyst had the highest increase in production and concentration of H2 and CO when the Ni loading was 10 wt%, the calcination temperature was 500 °C, the reaction temperature was 800 °C, and the holding time was 20 min. Compared with the pyrolysis of straw without a catalyst, the yield of H2 and CO increased from 85 mL/g and 125 mL/g to 238.5 mL/g and 255 mL/g, respectively, and the concentration of H2 and CO increased from 23.5 vol% and 29.4 vol% to 43.1 vol% and 41.9 vol%, respectively.

Comparative study of in-situ catalytic pyrolysis of rice husk for syngas production: Kinetics modelling and product gas analysis

2018 ◽  
Vol 197 ◽  
pp. 1231-1243 ◽  
Author(s):  
Adrian Chun Minh Loy ◽  
Suzana Yusup ◽  
Bridgid Lai Fui Chin ◽  
Darren Kin Wai Gan ◽  
Muhammad Shahbaz ◽  
...  
Keyword(s):  
Comparative Study ◽  
Rice Husk ◽  
Catalytic Pyrolysis ◽  
Gas Analysis ◽  
Syngas Production ◽  
Kinetics Modelling ◽  
Production Kinetics ◽  
Product Gas

Syngas production by two-stage method of biomass catalytic pyrolysis and gasification

2012 ◽  
Vol 110 ◽  
pp. 603-609 ◽  
Author(s):  
Qinglong Xie ◽  
Sifang Kong ◽  
Yangsheng Liu ◽  
Hui Zeng
Keyword(s):  
Catalytic Pyrolysis ◽  
Two Stage ◽  
Syngas Production

scholarly journals Syngas production by catalytic pyrolysis of rice straw over modified Ni-based catalyst

BioResources ◽  
2020 ◽  
Vol 15 (2) ◽  
pp. 2293-2309
Author(s):  
Kui Lan ◽  
Zhenhua Qin ◽  
Zeshan Li ◽  
Rui Hu ◽  
Xianzhou Xu ◽  
...  
Keyword(s):  
Rice Straw ◽  
Catalytic Pyrolysis ◽  
Fixed Bed ◽  
Dry Weight ◽  
Catalytic Performance ◽  
Molar Ratio ◽  
Active Components ◽  
X Ray ◽  
Syngas Production ◽  
The Stability

Ni-xLa/Al2O3-MgO-sawdust char catalysts were prepared by modifying the Ni/Al2O3 catalyst from two aspects of support and active components. The effect of Al2O3, MgO, sawdust char molar ratio, and La content of catalysts on syngas (H2 + CO) production in the catalytic pyrolysis of rice straw was investigated in a horizontal fixed-bed quartz tube reactor. Furthermore, the stability of catalysts with the optimum catalytic performance was tested and compared with that of the Ni/Al2O3 catalysts. X-ray diffraction, X-ray fluorescence, field emission scanning electron microscopy, energy disperse X-ray, and Brunauer-Emmett-Teller analyses were applied to understand the physiochemical properties of the supports and catalysts. The study revealed that the supports were composed of many irregular flaky particles and thus formed many pores. Moreover, the addition of La decreased the particle size of NiAl2O4 and increased the active metal surface of the Ni/Al2O3-MgO-sawdust catalysts. When the molar ratio of Al2O3, MgO, and sawdust char was 1:1:1 and the La content was 10 wt% (dry weight basis), the catalysts presented the highest syngas concentration of 78.9 vol% and the most stable performance during the catalytic pyrolysis process.

Hydrocarbon and hydrogen-rich syngas production by biomass catalytic pyrolysis and bio-oil upgrading over biochar catalysts

RSC Advances ◽  
2014 ◽  
Vol 4 (21) ◽  
pp. 10731-10737 ◽  
Author(s):  
Shoujie Ren ◽  
Hanwu Lei ◽  
Lu Wang ◽  
Quan Bu ◽  
Shulin Chen ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Catalytic Pyrolysis ◽  
High Surface ◽  
High Surface Area ◽  
High Porosity ◽  
Thermal Gravimetric ◽  
Surface Functional Groups ◽  
Good Thermal Stability ◽  
Syngas Production ◽  
Bio Oil

A renewable biochar catalyst was developed with high porosity, high surface area, high minerals and surface functional groups. It enhanced hydrogen (27.02 vol% in syngas) and hydrocarbons (42.56 area% in upgraded bio-oil) production in biomass catalytic pyrolysis and bio-oil upgrading. The biochar catalysts had good thermal stability and durability with less coking according to the thermal gravimetric (TG) analysis.

scholarly journals H2 and Syngas Production From Catalytic Cracking of Pig Manure and Compost Pyrolysis Vapor Over Ni-Based Catalysts

2018 ◽  
Vol 20 (3) ◽  
pp. 8-14 ◽  
Author(s):  
Wei Li ◽  
Jie Ren ◽  
Xiao-Yan Zhao ◽  
Takayuki Takarada
Keyword(s):  
Catalytic Cracking ◽  
Catalytic Pyrolysis ◽  
High Water ◽  
High Yield ◽  
Pig Manure ◽  
Carbon Conversion ◽  
Syngas Production ◽  
Lignite Char ◽  
Heavy Tar ◽  
Water Amount

Abstract Catalytic cracking of volatiles derived from wet pig manure (WPM), dried pig manure and their compost was investigated over Ni/Al2O3 and Ni-loaded on lignite char (Ni/C). Non-catalytic pyrolysis of WPM resulted in a carbon conversion of 43.3% and 18.5% in heavy tar and light tar, respectively. No tar was formed when Ni/Al2O3 was introduced for WPM gasifi cation and the gas yield signifi cantly reached to a high value of 64.4 mmol/g at 650oC. When Ni/C was employed, 5.9% of carbon in the light tar was found at 650oC, revealing that the Ni/C is not active enough for cracking of tarry materials. The pyrolysis vapor was cracked completely and gave a H2-rich tar free syngas in high yield. High water amount of WPM promotes steam gasifi cation of char support, causing the deactivation of Ni/C. Such a study may be benefi cial to the development of livestock manure catalytic gasifi cation technology.

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