Kinetic analysis and in-situ no support catalytic pyrolysis product distribution of Chinese herb residue

2021 ◽  
pp. 105114
Author(s):  
Shengxiong Huang ◽  
Yifeng Su ◽  
Wei Luo ◽  
Qian He ◽  
Sheng Huang ◽  
...  
Keyword(s):  
Kinetic Analysis ◽  
Catalytic Pyrolysis ◽  
Chinese Herb ◽  
Pyrolysis Product ◽  
Product Distribution

scholarly journals Effects of Acid Characteristics of Nanoporous MCM-48 on the Pyrolysis Product Distribution of Waste Pepper Stem

2014 ◽  
Vol 2014 ◽  
pp. 1-5
Author(s):  
Young-Kwon Park ◽  
Myung Lang Yoo ◽  
Sung Hoon Park
Keyword(s):  
Catalytic Activity ◽  
Aromatic Hydrocarbons ◽  
Catalytic Pyrolysis ◽  
Pyrolysis Product ◽  
Product Distribution ◽  
The Other ◽  
Nanoporous Catalysts ◽  
Aliphatic And Aromatic Hydrocarbons ◽  
Product Species ◽  
First Time

Nanoporous catalysts Si-MCM-48 and Al-MCM-48 were applied for the first time to the catalytic pyrolysis of waste pepper stem. Pyrolysis experiments were conducted at 550°C using Py-GC/MS to examine the product distribution rapidly. Phenolics were shown to be the most abundant product species of noncatalytic pyrolysis, whereas aliphatic and aromatic hydrocarbons were produced marginally. On the other hand, much larger quantities of furans and aliphatic and aromatic hydrocarbons were produced from the catalytic pyrolysis over MCM-48, while the production of phenolics was suppressed significantly. Al-MCM-48 showed a much higher catalytic activity than Si-MCM-48, which was attributed to its much higher acidity. The results of this study indicate that valuable chemicals can be produced from waste pepper stem using catalytic pyrolysis over an acidic nanoporous catalyst.

scholarly journals Thermogravimetric kinetic analysis of in-situ catalytic pyrolysis of palm oil wastes with the presence of palm oil wastes ash catalyst

2021 ◽  
Vol 1195 (1) ◽  
pp. 012010
Author(s):  
S W Hii ◽  
B L F Chin ◽  
C L Yiin ◽  
F R S Majing ◽  
Z A Jawad ◽  
...  
Keyword(s):  
Activation Energy ◽  
Kinetic Analysis ◽  
Palm Oil ◽  
Oil Palm ◽  
Catalytic Pyrolysis ◽  
Heating Rates ◽  
Exponential Factor ◽  
Oil Palm Frond ◽  
Palm Frond

Abstract The thermal degradation and kinetic analysis for oil palm frond (OPF) and oil palm trunk (OPT) with its ashes were investigated using thermogravimetric approach (TGA). OPF ash, OPT ash and its mixtures are used as a natural source of catalysts in the pyrolytic conversion of the palm oil wastes to bioenergy. The TGA experiments were conducted in a range of heating rates of 10-100 K/min from the temperature of 323 K to 1173 K. Coats-Redfern model is applied in this study to evaluate the activation energy (EA ) and pre-exponential factor (A). The average EA values ranged 24.27-32.36 kJ.mol−1 and 41.42-46.10 kJ.mol−1 for pyrolysis of OPF and OPT respectively. Meanwhile, the average EA values ranged 24.27-31.06 kJ.mol−1 and 31.77-43.45 kJ.mol−1 for catalytic pyrolysis of OPF and OPT respectively.

Kinetic analysis of Ag particle redispersion into ZSM-5 in the presence of coke using in situ XAFS

2021 ◽  
Author(s):  
Kazumasa Murata ◽  
Junya Ohyama ◽  
Atsushi Satsuma
Keyword(s):  
Fine Structure ◽  
Kinetic Analysis ◽  
X Ray ◽  
Xafs Spectroscopy ◽  
Absorption Fine ◽  
Ag Particles ◽  
In Situ Xafs ◽  
Ag Particle ◽  
X Ray Absorption

In the present study, the redispersion behavior of Ag particles on ZSM-5 in the presence of coke was observed using in situ X-ray absorption fine structure (XAFS) spectroscopy.

Products characterization for fast in-situ catalytic pyrolysis of bio-oil over Ni/Al2O3

2021 ◽  
Vol 657 (1) ◽  
pp. 012023
Author(s):  
Zengtong Deng ◽  
Yi Wang ◽  
Song Hu ◽  
Sheng Su ◽  
Long Jiang ◽  
...  
Keyword(s):  
Catalytic Pyrolysis ◽  
Bio Oil

Solar assisted catalytic pyrolysis of chicken-litter waste with in-situ and ex-situ loading of CaO and char

Fuel ◽  
2019 ◽  
Vol 246 ◽  
pp. 408-416 ◽  
Author(s):  
Haftom Weldekidan ◽  
Vladimir Strezov ◽  
Tao Kan ◽  
Ravinder Kumar ◽  
Jing He ◽  
...  
Keyword(s):  
Catalytic Pyrolysis ◽  
Ex Situ ◽  
Chicken Litter

scholarly journals CO2 Hydrogenation to Olefin-Rich Hydrocarbons Over Fe-Cu Bimetallic Catalysts: An Investigation of Fe-Cu Interaction and Surface Species

2021 ◽  
Vol 3 ◽  
Author(s):  
Wenjia Wang ◽  
Xiaoxing Wang ◽  
Guanghui Zhang ◽  
Ke Wang ◽  
Fu Zhang ◽  
...  
Keyword(s):  
Product Distribution ◽  
Distribution Analysis ◽  
Cu Alloy ◽  
Cu Catalyst ◽  
Reaction Performance ◽  
Cu Catalysts ◽  
Adsorbed Co ◽  
X Ray Absorption ◽  
Indirect Route

Previously, we reported a strong Fe-Cu synergy in CO2 hydrogenation to olefin-rich C2+ hydrocarbons over the γ-Al2O3 supported bimetallic Fe-Cu catalysts. In this work, we aimed to clarify such a synergy by investigating the catalyst structure, Fe-Cu interaction, and catalyst surface properties through a series of characterizations. H2-TPR results showed that the addition of Cu made both Fe and Cu easier to reduce via the strong interaction between Fe and Cu. It was further confirmed by X-ray absorption spectroscopy (XAS) and TEM, which showed the presence of metallic Fe and Fe-Cu alloy phases in the reduced Fe-Cu(0.17) catalyst induced by Cu addition. By correlating TPD results with the reaction performance, we found that the addition of Cu enhanced both the moderately and strongly adsorbed H2 and CO2 species, consequently enhanced CO2 conversion and C2+ selectivity. Adding K increased the adsorbed-CO2/adsorbed-H2 ratio by greatly enhancing the moderately and strongly adsorbed CO2 and slightly suppressing the moderately and strongly adsorbed H2, resulting in a significantly increased O/P ratio in the produced hydrocarbons. The product distribution analysis and in situ DRIFTS suggested that CO2 hydrogenation over the Fe-Cu catalyst involved both an indirect route with CO as the primary product and a direct route to higher hydrocarbons.

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