Structural Characterization of Oil Component of High Temperature Pyrolysis Tars

Sütçü, Hale; Toroğlu, İhsan; Pişkin, Sabriye

doi:10.1080/00908310490449234

Cited by 10 publications

(7 citation statements)

References 8 publications

(8 reference statements)

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“…The assignments of proton chemical shifts in 1 H NMR were list in Table . , The 1 H NMR spectra were integrated, and their percentage from the total signal was estimated. According to Table , the 1 H NMR integral results of tar at different treatment conditions were presented in Table .…”

Section: Resultsmentioning

confidence: 99%

Hydrogen Transfer Route during Hydrothermal Treatment of Lignite Using the Isotope Tracer Method and Improving the Pyrolysis Tar Yield

et al. 2016

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Hydrothermal treatment was used to upgrade Inner Mongolia lignite (IML) before pyrolysis. The hydrogen transfer route during hydrothermal treatment of lignite by the isotope tracer method was carried out in an autoclave. Typical experiments of D2O substituted for pure water under four treatment temperatures (180, 220, 260, and 300 °C) were also performed. The pyrolysis tar composition was analyzed by 1H nuclear magnetic resonance (NMR) and gas chromatography and mass spectrometry (GC–MS). Four kinds of typical substances were studied in detail in tar from D2O-treated lignite, and the deuterated extent (D1, D2, D3, and D4) was quantitated by selected peaks in mass spectra. The results showed that the deuterium atom was more prone to incorporate into the aromatic ring with respect to aliphatic carbon chains. The values of D2, D3, and D4 were all increased with the increase of the treatment temperature. Toluene and phenol analyses showed that deuterium atoms incorporated into the aromatic ring were distinct by different substituents. The route of hydrogen transfer during hydrothermal treatment was well-investigated by the deuterium tracer method.

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Section: Resultsmentioning

confidence: 99%

Hydrogen Transfer Route during Hydrothermal Treatment of Lignite Using the Isotope Tracer Method and Improving the Pyrolysis Tar Yield

et al. 2016

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“…The 1 H MAS NMR spectrum of unprocessed coal was fit to Lorentzian curves yielding two major peaks at approximately 6.1 ppm and 0.5 ppm. In the case of the unprocessed lignite, the peak at~1.0 ppm is assigned to aliphatic protons in the range of 0.5-5 ppm [22,27] and 6.1 ppm peak represents aromatic protons [27][28][29]. The 1 H MAS NMR spectrum of pyrolysis char revealed two peaks at (− 0.7 and 6.5 ppm).…”

Section: H and 13 C (Cp) Mas-nmr Spectroscopymentioning

confidence: 97%

Following the structure and reactivity of Tuncbilek lignite during pyrolysis and hydrogenation

Kanca

Dodd

Reimer

et al. 2016

Fuel Processing Technology

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Available online xxxxCombustion, pyrolysis and hydropyrolysis reactivity of Tuncbilek lignite was monitored by temperature programmed pyrolysis (TPP) under pure nitrogen flow, temperature programmed oxidation (TPO) under air flow and temperature programmed hydrogenation (TPH) under hydrogen flow at atmospheric pressure in a packed bed reactor.The structures of the organic and inorganic components were analyzed by NMR spectroscopy and XRD. Only methane and hydrogen were the main products of TPP while small amounts of CO and CO 2 were also observed. Solid-state 1 H and 13 C CPMAS and 1 H liquid Nuclear Magnetic Resonance (NMR) Spectroscopy of the pristine lignite, as well as tar and char products of pyrolysis and hydrogenation (hydropyrolysis), revealed similar tar compositions. TGA of pyrolysis chars indicated that there were more residual volatiles in hydropyrolysis char in comparison to pyrolysis char. Elemental analysis of pyrolysis and hydropyrolysis chars revealed that 25% of sulfur was lost during pyrolysis, whereas N 90% of sulfur was lost during hydropyrolysis indicating efficiency of atmospheric pressure hydropyrolysis for both desulfurization and tar production. Volatile matter and fixed carbon, mostly aromatic, gave rise to distinct oxidation peaks during TPO. The oxidation peak due to volatiles was missing from TPO of pyrolysis char as well as from organic contents determined by NMR spectroscopy.

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“…In the range of 6.5-9.0 ppm the aromatic hydrogen resonances occurs. [12] The molar percentages of the hydrogen types that were calculated on the basis of the chemical deviation values obtained from the 1H NMR spectra of oils extracted from both peanut shell and chickpeas samples are in Table 5 and 6. The 1HNMR spectra of bio-oil obtained from peanut shells shows that majority of the bio oil belongs to the aromatic region (CH 3 , CH2, and CHα) having 39.45 mol percent.…”

Section: B Bio Oil Chemical Analysismentioning

confidence: 99%

“…Bio-treatment is highly selective, providing only a few unique products. Contrarily, in the majority of the thermochemical change process, pyrolysis is generally can create a wide scope of items in short response time, including bio-charcoal, bio-oil, and non-condensable gases [7,8] There have been considerable efforts on converting biomass to liquid bio-oil [12]. Fatimatul Zaharah Abbas [9] took a sample of oil palm fiber (OPF) and performed and performed pyrolysis, about 41.2 wt % of maximum yield of oil is obtained at the temperature of 500°C.…”

Section: Introductionmentioning

confidence: 99%

Pyrolysis of Chickpeas Waste and Peanut Shells for the Production of Oil and its Analysis

Iqbal¹,

Ben²,

Wu³

2019

IJEW

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Pyrolysis is one of the widely used technique among the thermal conversion processes of biomass. Biomass in the form of agricultural residues is prevalent in new renewable energy sources, especially in view of its broad potential and rich use. In this paper, the pyrolysis of chickpeas and peanut shells in laboratory-scale tubular furnace reactors is studied, which is considered to be an effective method to utilize agricultural residues in China. The effects of raw material ratio and reaction temperature on the distribution of pyrolysis products are described quantitatively, as well as some characteristics of these products produced in the tubular furnace reactor system developed in this study. The main constituents of bio-oil are categorized into three kinds including aromatic compound, carbonyl compounds and carboxyl compounds that were analyzed with 1H NMR (nuclear magnetic resonance characterization). The maximum yield of bio-oil, about 44.80% from the peanut shell biomass, and 10.3% from the waste of chickpeas by weight was extracted, at a flow rate 10 L/min of N2 at a reaction temperature of 500°C was achieved.

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Structural Characterization of Oil Component of High Temperature Pyrolysis Tars

Cited by 10 publications

References 8 publications

Hydrogen Transfer Route during Hydrothermal Treatment of Lignite Using the Isotope Tracer Method and Improving the Pyrolysis Tar Yield

Hydrogen Transfer Route during Hydrothermal Treatment of Lignite Using the Isotope Tracer Method and Improving the Pyrolysis Tar Yield

Following the structure and reactivity of Tuncbilek lignite during pyrolysis and hydrogenation

Pyrolysis of Chickpeas Waste and Peanut Shells for the Production of Oil and its Analysis

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