scholarly journals Syngas Characteristics From Catalytic Gasification of Polystyrene and Pinewood in CO2 Atmosphere

2021 ◽  
Vol 143 (5) ◽  
Author(s):  
Xuan Liu ◽  
Kiran Raj G. Burra ◽  
Zhiwei Wang ◽  
Jinhu Li ◽  
Defu Che ◽  
...  
Keyword(s):  
Mole Fraction ◽  
Fixed Bed ◽  
Fixed Bed Reactor ◽  
Catalytic Gasification ◽  
Syngas Production ◽  
Cold Gas Efficiency ◽  
Gas Efficiency ◽  
Al2o3 Catalyst ◽  
Co2 Atmosphere ◽  
Cold Gas

Abstract Syngas production from catalytic gasification of polystyrene and pinewood in CO2 atmosphere was investigated over Ni-Mg/Al2O3 catalyst in a fixed-bed reactor at 900 °C. A quasi in situ method was adopted for catalytic gasification wherein the catalyst placed downstream of the feedstock in the same reactor was used for enhanced syngas production. The effect of catalyst on evolutionary behavior, cumulative syngas yield, syngas composition, and cold gas efficiency was systematically analyzed. The results showed that addition of catalyst for polystyrene gasification resulted in enhanced yields of 63% H2, 20% CO, 119% CH4, and 85% C2-C3 yields. Enhanced H2 and light hydrocarbon yields were mainly from enhanced cracking of pyrolytic vapors from polystyrene degradation, while the CO yield was attributed to CO2-assisted reforming of benzene derivatives from primary cracking and polycyclic aromatic hydrocarbons (PAHs) from secondary gas phase condensations. The yields of H2, CO, CH4, and C2-C3 from pinewood gasification in the presence of catalyst was also enhanced by 150%, 14%, 39%, and 16%, respectively, indicating that Ni-Mg/Al2O3 catalyst can efficiently enhance syngas production in CO2-assisted gasification. A comparison of syngas composition between non-catalytic and catalytic conditions revealed improved syngas quality in catalytic gasification with increased H2 mole fraction but decreased CO mole fraction. Furthermore, cold gas efficiency enhanced from 44% to 57% in catalytic polystyrene gasification, and from 75% to 94% in catalytic pinewood gasification. The results suggest that catalytic CO2 gasification offers a promising pathway for efficient energy production from wastes plastics and biomass while simultaneously using CO2.

scholarly journals Gasification Applicability of Korean Municipal Waste Derived Solid Fuel: A Comparative Study

Processes ◽  
2020 ◽  
Vol 8 (11) ◽  
pp. 1375
Author(s):  
Sang Yeop Lee ◽  
Md Tanvir Alam ◽  
Gun Ho Han ◽  
Dong Hyuk Choi ◽  
Se Won Park
Keyword(s):  
Solid Fuel ◽  
Fossil Fuels ◽  
Fixed Bed ◽  
Experimental Results ◽  
Municipal Waste ◽  
Fixed Bed Reactor ◽  
Renewable Energy Resources ◽  
Syngas Production ◽  
Cold Gas Efficiency ◽  
Gas Efficiency

Gaining energy independence by utilizing new and renewable energy resources has become imperative for Korea. Energy recovery from Korean municipal solid waste (MSW) could be a promising option to resolve the issue, as Korean MSW is highly recyclable due to its systematic separation, collection and volume-based waste disposal system. In this study, gasification experiments were conducted on Korean municipal waste-derived solid fuel (SRF) using a fixed bed reactor by varying the equivalence ratio (ER) to assess the viability of syngas production. Experiments were also conducted on coal and biomass under similar conditions to compare the experimental results, as the gasification applicability of coal and biomass are long-established. Experimental results showed that Korean SRF could be used to recover energy in form of syngas. In particular, 50.94% cold gas efficiency and 54.66% carbon conversion ratio with a lower heating value of 12.57 MJ/Nm3 can be achieved by gasifying the SRF at 0.4 ER and 900 °C. However, compared to coal and biomass, the syngas efficiency of Korean SRF was less, which can be resolved by operating the gasification processes at high temperatures. If proper research and development activities are conducted on Korean SRF, it could be a good substitute for fossil fuels in the future.

Effects of operating parameters on co-gasification of coconut petioles and refuse-derived fuel

2021 ◽  
pp. 0734242X2110039
Author(s):  
Natvaree Chommontha ◽  
Awassada Phongphiphat ◽  
Komsilp Wangyao ◽  
Suthum Patumsawad ◽  
Sirintornthep Towprayoon
Keyword(s):  
Fixed Bed ◽  
Fixed Bed Reactor ◽  
Producer Gas ◽  
Treatment Technology ◽  
Flow Rates ◽  
Cold Gas Efficiency ◽  
Refuse Derived Fuel ◽  
Agent Flow ◽  
Gas Efficiency ◽  
Cold Gas

Coconut agro-industry in the western region of Thailand generates a large amount of residues. This study investigated the energy production potential of discarded coconut petioles, with a focus on co-gasification with refuse-derived fuel (RDF). Gasification tests involving petioles, RDFs and their mixtures (25%, 50%, 75% or 100% by weight) were conducted in a laboratory-scale fixed bed reactor. Fuel samples of 5 g were gasified at 700°C–900°C for 60 minutes, using simulated air (79% N2 to 21% O2, by volume) as a gasifying agent. Gasification of petioles generated producer gas with lower heating values, estimated at 0.43–0.75 MJ Nm−3, while RDF produced 0.92–1.39 MJ Nm−3. Adding greater quantities of RDF to the fuel mixture resulted in an increase in the heating value of the producer gas and cold gas efficiency. The operating temperatures and gasifying-agent flow rates affected the efficiency of process differently, depending on the fuel composition. However, the maximum cold gas efficiency from both fuels was detected in tests conducted at 800°C. In co-gasification and pure refuse-derived-fuel tests, higher temperatures and gasifying-agent flow rates led to outputs with higher energy yields. Our findings suggested that co-gasification of petiole is a viable alternative waste-treatment technology for this region.

scholarly journals Analysis of coal gasifier performance. Quantitative evaluation of development subjects and the analysis of factors influencing cold gas efficiency.

1985 ◽  
Vol 64 (9) ◽  
pp. 716-733
Author(s):  
Takehiko FURUSAWA ◽  
Toshinori KOJIMA ◽  
Seiji TOKAWA ◽  
Shuichi TANAKA ◽  
Takuya KAWANISHI ◽  
...  
Keyword(s):  
Quantitative Evaluation ◽  
Cold Gas Efficiency ◽  
Coal Gasifier ◽  
Factors Influencing ◽  
Gas Efficiency ◽  
Cold Gas

scholarly journals Effect of CO2 partial pressure on dry reforming of ethanol for hydrogen production

2018 ◽  
Vol 1 (1) ◽  
pp. 6-10
Author(s):  
Fahim Fayaz ◽  
Ahmad Ziad Sulaiman ◽  
Sharanjit Singh ◽  
Sweeta Akbari
Keyword(s):  
Partial Pressure ◽  
Fixed Bed ◽  
Dry Reforming ◽  
Fixed Bed Reactor ◽  
Bet Surface Area ◽  
Impregnation Method ◽  
X Ray Diffraction ◽  
Co2 Partial Pressure ◽  
Temperature Programmed ◽  
Al2o3 Catalyst

The effect of CO2 partial pressure on ethanol dry reforming was evaluated over 5%Ce-10%Co/Al2O3 catalyst at = PCO2 = 20-50 kPa, PC2H5OH = 20 kPa, reaction temperature of 973 K under atmospheric pressure. The catalyst was prepared by using impregnation method and tested in a fixed-bed reactor. X-ray diffraction measurements studied the formation of Co3O4, spinel CoAl2O4 and CeO2, phases on surface of 5%Ce-10%Co/Al2O3 catalyst. CeO2, CoO and Co3O4 oxides were obtained during temperature–programmed calcination. Ce-promoted 10%Co/Al2O3 catalyst possessed high BET surface area of 137.35 m2 g-1. C2H5OH and CO2 conversions was improved with increasing CO2 partial pressure from 20-50 kPa whilst the optimal selectivity of H2 and CO was achieved at 50 kPa.

scholarly journals Supercritical Transesterification of Palm Oil and Hydrated Ethanol in a Fixed Bed Reactor with a CaO/Al2O3 Catalyst

Energies ◽  
2012 ◽  
Vol 5 (4) ◽  
pp. 1062-1080 ◽  
Author(s):  
Ruengwit Sawangkeaw ◽  
Pornicha Tejvirat ◽  
Chawalit Ngamcharassrivichai ◽  
Somkiat Ngamprasertsith
Keyword(s):  
Palm Oil ◽  
Fixed Bed ◽  
Fixed Bed Reactor ◽  
Al2o3 Catalyst

Effect of atmosphere and temperature on syngas production during gasification of Zhundong lignite and water-washed Zhundong lignite in a fixed-bed reactor

2019 ◽  
Vol 74 (2) ◽  
pp. 555-569
Author(s):  
Xiuqi Shu ◽  
Jianbo Li ◽  
Jian Hao ◽  
Zhuo Liu ◽  
Quanhai Wang ◽  
...  
Keyword(s):  
Fixed Bed ◽  
Fixed Bed Reactor ◽  
Syngas Production

scholarly journals Investigation on the simultaneous removal of COS, CS2 and O2 from coke oven gas by hydrogenation on a Pd/Al2O3 catalyst

2020 ◽  
Vol 10 (9) ◽  
pp. 2961-2969
Author(s):  
Eva Kamp ◽  
Holger Thielert ◽  
Olaf von Morstein ◽  
Sven Kureti ◽  
Norman Schreiter ◽  
...  
Keyword(s):  
Fixed Bed ◽  
Coke Oven ◽  
Fixed Bed Reactor ◽  
Organosulfur Compounds ◽  
Simultaneous Removal ◽  
Coke Oven Gas ◽  
Al2o3 Catalyst

Simultaneous hydrogenation of organosulfur compounds and O2 by Pd/Al2O3 catalyst was studied in a fixed bed reactor and by DRIFTS.

Simulation Studies of Steam Reforming of Methane using Ni-Al2O3 Catalysts

2010 ◽  
Vol 8 (1) ◽  
Author(s):  
Giane Gonçalves Lenzi ◽  
Ervin Kaminski Lenzi ◽  
Cláudio Vilas Boas Fávero ◽  
Marcelo Kaminski Lenzi ◽  
Regina Maria Matos Jorge ◽  
...  
Keyword(s):  
Sol Gel ◽  
Fixed Bed ◽  
Fixed Bed Reactor ◽  
Co2 Production ◽  
Simulation Studies ◽  
One Dimensional ◽  
Wgs Reaction ◽  
Different Characteristics ◽  
Water Gas ◽  
Al2o3 Catalyst

This paper reports the results of reforming methane into synthesis gas using industrial Ni-Al2O3 catalyst (75% NiO wt.) and Ni-Al2O3 produced by the sol gel method (8% Ni wt.). A mathematical investigation on the performance of a one-dimensional model of catalytic conventional fixed-bed reactor was developed and implemented for the process. The results indicated that the industrial catalyst favored the water gas shift (WGS) reaction increasing CO2 production. However in temperatures of 773 and 973 K the yield (H2/CH4,reacted) was more efficient for the sol-gel catalyst. This result is possibly due to the different characteristics as specific surface area and temperature reduction. The model validation for the adjustment parameters U and a1 was more efficient for temperature profiles (2% error) than for mole fraction (10% error).

Synthesis of CeO2 Supported BaCoO3 Perovskites for Chemical-Looping Methane Reforming to Syngas and Hydrogen

2017 ◽  
Author(s):  
Haoran Ding ◽  
Yongqing Xu ◽  
Linyi Xiang ◽  
Qiyao Wang ◽  
Cheng Shen ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Sol Gel ◽  
Fixed Bed ◽  
Gas Production ◽  
Fixed Bed Reactor ◽  
Methane Reforming ◽  
Chemical Looping ◽  
X Ray ◽  
Syngas Production ◽  
Fuel Reactor

In order to reduce the hotspots in partial oxidation of methane, CeO2 supported BaCoO3 perogvskite-type oxides were synthesized using a sol-gel method and applied in chemical-looping steam methane reforming (CL-SMR). The synthesized BaCoO3-CeO2 was characterized by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). XRD and XPS results suggested that the obtained BaCoO3 was pure crystalline perovskite, its crystalline structure and lattice oxygen could regenerate after calcining. The reactivity of perovskite-type oxides in CL-SMR was evaluated using a fixed-bed reactor. Gas production rates and H2/CO ratios showed that the optimal reaction temperature was about 860 °C and the properly reaction time in fuel reactor was about 180s when Weight Hourly Space Velocity (WHSV) was 23.57 h−1. The syngas production in fuel reactor were 265.11 ml/g, hydrogen production in reforming reactor were 82.53 ml/g. (CSPE)

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