Pyrolysis of textile dyeing sludge in fluidized bed and microwave-assisted auger reactor: Comparison and characterization of pyrolysis products

The characterization of the biofilm of an anaerobic fluidized-bed reactor was completed under standard conditions. The distribution of the fixed protein concentration depended on the level in the reactor. The protein concentration reached 1520 µg.g−1 of support at the top of the reactor and only 1200 µg.g−1 at the bottom after 504 hours of operation but the specific activity of the biofilm was 33×10−4 µM acetate.h−1.mg−1 proteins at the bottom and only 26×10−4 µM.h−1.mg−1 at the top. The efficiency of a fluidized bed reactor and the composition of the biofilm changed with an increase of the pH from 7 to 8.5 during the seeding of the support material. Future development of the biofilm and the specific activity of the support were affected.

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Preparation and characterization of polyacrylic acid-hydroxyapatite nanocomposite by microwave-assisted synthesis method

Heliyon ◽

10.1016/j.heliyon.2021.e07226 ◽

2021 ◽

Vol 7 (6) ◽

pp. e07226

Author(s):

Sevgi Sözügeçer ◽

Nursel Pekel Bayramgil

Keyword(s):

Polyacrylic Acid ◽

Synthesis Method ◽

Microwave Assisted Synthesis ◽

Microwave Assisted

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Colored cotton wastes valuation through thermal and catalytic reforming of pyrolysis vapors (Py-GC/MS)

Scientific Reports ◽

10.1038/s41598-021-95043-1 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Janduir Egito da Silva ◽

Guilherme Quintela Calixto ◽

Rodolfo Luiz Bezerra de Araújo Medeiros ◽

Marcus Antônio de Freitas Melo ◽

Dulce Maria de Araújo Melo ◽

...

Keyword(s):

Lignin Content ◽

Proximate Analysis ◽

Catalytic Reforming ◽

Pyrolysis Products ◽

Heating Value ◽

Colored Cotton ◽

Benzene Toluene ◽

Naturally Colored Cotton ◽

Main Influence

AbstractThis study aims to analyze the products of the catalytic pyrolysis of naturally colored cotton residues, type BRS (seeds from Brazil), called BRS-Verde, BRS-Rubi, BRS-Topázio and BRS-Jade. The energy characterization of biomass was evaluated through ultimate and proximate analysis, higher heating value, cellulose, hemicellulose and lignin content, thermogravimetric analysis and apparent density. Analytical pyrolysis was performed at 500 °C in an analytical pyrolyzer from CDS Analytical connected to a gas chromatograph coupled to the mass spectrometer (GC/MS). The pyrolysis vapors were reformed at 300 and 500 °C through thermal and catalytic cracking with zeolites (ZSM-5 and HZSM-5). It has been noticed that pyrolysis vapor reforming at 500 °C promoted partial deoxygenation and cracking reactions, while the catalytic reforming showed better results for the product deoxygenation. The catalyst reforming of pyrolysis products, especially using HZSM-5 at 500 °C, promoted the formation of monoaromatics such as benzene, toluene, xylene and styrene, which are important precursors of polymers, solvents and biofuels. The main influence on the yields of these aromatic products is due to the catalytic activity of ZSM-5 favored by increased temperature that promotes cracking reactions due expanded zeolites channels.

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Characterization of pyrolysis products of oil palm empty fruit bunch

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/749/1/012041 ◽

2021 ◽

Vol 749 (1) ◽

pp. 012041

Author(s):

Slamet Handoko ◽

N. Nurhadi ◽

Sri mujiati ◽

Rachma Fitriani

Keyword(s):

Oil Palm ◽

Empty Fruit Bunch ◽

Pyrolysis Products

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Microwave-assisted synthesis and characterization of some optically active poly(ester-imide) thermoplastic elastomers

e-Polymers ◽

10.1515/epoly.2009.9.1.839 ◽

2009 ◽

Vol 9 (1) ◽

Cited By ~ 4

Author(s):

Saeed Zahmatkesh ◽

Abdol Reza Hajipour

Keyword(s):

Thermal Analyses ◽

Specific Rotation ◽

Thermoplastic Elastomers ◽

Optically Active ◽

Microwave Assisted Synthesis ◽

H Nmr ◽

Microwave Assisted ◽

Diacid Chloride ◽

Elemental Analyses

AbstractPyromellitic dianhydride (1) was reacted with L-leucine (2) to result in [N,N'-(pyromellitoyl)-bis-L-leucine diacid] (3). This compound (3) was converted to N,N'-(pyromellitoyl)-bis-L-leucine diacid chloride (4) by reaction with thionyl chloride. The microwave-assisted polycondensation of this diacid chloride (4) with polyethyleneglycol-diol (PEG-200) and/or three synthetic bisphenols furnish a series of new PEIs and Co-PEIs in a laboratory microwave oven (Milestone). The resulting polymers and copolymers have inherent viscosities in the range of 0.31- 0.53 dl g-1. These polymers are optically active, thermally stable and soluble in polar aprotic solvents such as DMF, DMSO, NMP, DMAc and sulfuric acid. All of the above polymers were fully characterized by IR spectroscopy, 1H NMR spectroscopy, elemental analyses, specific rotation and thermal analyses. Some structural characterizations and physical properties of these optically active PEIs and Co-PEIs are reported.

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