Preliminary study on co-gasification behavior of deoiled asphalt with coal and biomass

Zhang, Qian; Li, Qingfeng; Zhang, Linxian; Wang, Zhiqing; Jing, Xuliang; Yu, Zhongliang; Song, Shuangshuang; Fang, Yitian

doi:10.1016/j.apenergy.2014.07.014

Cited by 32 publications

(20 citation statements)

References 41 publications

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“…From Figs 3 and 4 , the plots of ln(−ln(1−α)/T 2 ) versus 1/T , 7 straight lines can be obtained, which indicated that the laterite decomposition and Na 2 SO 4 /laterite blend decomposition can be classified as a first order reaction. Therefore, the entire decomposition process can be described by one first-order reaction, which is consistent with the results from the literature [ 16 – 18 ].…”

Section: Resultssupporting

confidence: 90%

“…The kinetic parameters were determined by the integral method, which assumed that the decomposition of laterite with and without the addition of Na 2 SO 4 occurred in multiple stages and is a first-order reaction for each stage [ 16 – 18 ]. The following results indicate that this assumption is reasonable.…”

Section: Methodsmentioning

confidence: 99%

“…The rate reactions of the solid-state can be then expressed using differential kinetic equations [ 19 – 20 ]. The decomposition reaction of laterite with and without the addition of Na 2 SO 4 was obtained from the literature [ 18 ] and is expressed by the following formula: where α is the decomposition conversion, t is time, k(t) is the temperature-dependent rate constant, and f ( α ) is a function that represents the reaction model.…”

Section: Methodsmentioning

confidence: 99%

“…The decomposition conversion, α , can be expressed by [ 18 ] where W 0 is the original weight of the test sample, W t is the weight at time t, and W f is the final weight at the end of the decomposition.…”

Section: Methodsmentioning

confidence: 99%

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Mechanistic and Kinetic Analysis of Na2SO4-Modified Laterite Decomposition by Thermogravimetry Coupled with Mass Spectrometry

Yang

Shi

et al. 2016

PLoS ONE

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Nickel laterites cannot be effectively used in physical methods because of their poor crystallinity and fine grain size. Na2SO4 is the most efficient additive for grade enrichment and Ni recovery. However, how Na2SO4 affects the selective reduction of laterite ores has not been clearly investigated. This study investigated the decomposition of laterite with and without the addition of Na2SO4 in an argon atmosphere using thermogravimetry coupled with mass spectrometry (TG-MS). Approximately 25 mg of samples with 20 wt% Na2SO4 was pyrolyzed under a 100 ml/min Ar flow at a heating rate of 10°C/min from room temperature to 1300°C. The kinetic study was based on derivative thermogravimetric (DTG) curves. The evolution of the pyrolysis gas composition was detected by mass spectrometry, and the decomposition products were analyzed by X-ray diffraction (XRD). The decomposition behavior of laterite with the addition of Na2SO4 was similar to that of pure laterite below 800°C during the first three stages. However, in the fourth stage, the dolomite decomposed at 897°C, which is approximately 200°C lower than the decomposition of pure laterite. In the last stage, the laterite decomposed and emitted SO2 in the presence of Na2SO4 with an activation energy of 91.37 kJ/mol. The decomposition of laterite with and without the addition of Na2SO4 can be described by one first-order reaction. Moreover, the use of Na2SO4 as the modification agent can reduce the activation energy of laterite decomposition; thus, the reaction rate can be accelerated, and the reaction temperature can be markedly reduced.

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Section: Resultssupporting

confidence: 90%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Mechanistic and Kinetic Analysis of Na2SO4-Modified Laterite Decomposition by Thermogravimetry Coupled with Mass Spectrometry

Yang

Shi

et al. 2016

PLoS ONE

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“…Catalysts are used to improve the nature of products by increasing the amount of hydrocarbons and reducing the quantity of water and fuel value by deteriorating organic compounds. Biomass pyrolysis may also be upgraded by the use of co‐pyrolysis or the use of hydrogen as reactant . Pretreatment of the biomass, which include impregnation of the biomass with catalyst and varying the conditions of pyrolysis may also improve the quality of pyrolysis .…”

Section: Introductionmentioning

confidence: 99%

Effect of pretreatment on product distribution of two‐step catalytic pyrolysis of spirogyra

Hussain

Sulaiman

Bashir

et al. 2017

Env Prog and Sustain Energy

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This study was aimed at investigating the effect of pretreatment on product distribution of two‐step catalytic pyrolysis of spirogyra. The treatment of fresh spirogyra, putrefied spirogyra, and microbe‐treated spirogyra was carried out under moist conditions. The earth burial in anaerobic conditions and microbe treatment of spirogyra were performed for biological transformation of long‐chain and macromolecular compounds into hydrogen‐rich and carbon‐rich compounds. In later stage, two‐step pyrolysis of the samples was performed to reduce the amount of water and highly oxygenated compounds, and to produce efficient liquid and gaseous fuels. Both steps of pyrolysis were catalyzed by Portland cement. However, prior to second step of pyrolysis, the pyrolysate of each sample was separated into volatile combustible liquid and a paste like organic material. The organic paste was used as feedstock for second step of pyrolysis and converted into oil and highly combustible gas. The oil product was further analyzed using GC‐FID and GC‐MS techniques. The experimental results revealed that the enzymatic and microbial putrefaction of spirogyra would be helpful in upgrading the fuel quality and yield of the pyrolytic conversion. © 2017 American Institute of Chemical Engineers Environ Prog, 36: 775–780, 2017

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Catalytic effect of alkali metal in biomass ash on the gasification of coal char in CO2

Qin

Ren

et al. 2019

J Therm Anal Calorim

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Preliminary study on co-gasification behavior of deoiled asphalt with coal and biomass

Cited by 32 publications

References 41 publications

Mechanistic and Kinetic Analysis of Na2SO4-Modified Laterite Decomposition by Thermogravimetry Coupled with Mass Spectrometry

Mechanistic and Kinetic Analysis of Na2SO4-Modified Laterite Decomposition by Thermogravimetry Coupled with Mass Spectrometry

Effect of pretreatment on product distribution of two‐step catalytic pyrolysis of spirogyra

Catalytic effect of alkali metal in biomass ash on the gasification of coal char in CO2

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