Distribution of Sulfur Forms in Low Temperature Pyrolysis of Coal

2012 ◽  
Vol 512-515 ◽  
pp. 834-837
Author(s):  
Qiu Xiang Yao ◽  
Mei Li Du ◽  
Shui Li Wang ◽  
Jing Liu ◽  
Jian Li Yang ◽  
...  
Keyword(s):  
Low Temperature ◽  
Coal Tar ◽  
Northwest China ◽  
Sulfur Compounds ◽  
Organic Sulfur ◽  
Total Sulfur ◽  
Low Temperature Pyrolysis ◽  
Sulfur Containing ◽  
Sulfur Containing Compounds ◽  
Typical Method

The distribution of sulfur forms in the products of low temperature pyrolysis of Carboniferous high sulfur coal from Northwest China was investigated. The typical method of Gray-King assay was used to carry out the low temperature pyrolysis experiments. GC-MS analysis was used to investigate the composition of sulfur compounds in the coal tar. The results show that sulfur mainly remained in the semi-coke and accounted for 80.97% of the total sulfur. Pyrites decomposed and transformed into sulfates and organic sulfur. 5 sulfur containing compounds were detected in the coal tar and they are dibenzothiophene, benzonaphthothiophene and their substituted homologs.

Release of organic sulfur as sulfur-containing gases during low temperature pyrolysis of sewage sludge

2015 ◽  
Vol 35 (3) ◽  
pp. 2767-2775 ◽  
Author(s):  
Shuai Liu ◽  
Mengmeng Wei ◽  
Yu Qiao ◽  
Zhenle Yang ◽  
Ben Gui ◽  
...  
Keyword(s):  
Sewage Sludge ◽  
Low Temperature ◽  
Organic Sulfur ◽  
Low Temperature Pyrolysis ◽  
Sulfur Containing

Composition and Structure of the Sulfur-Containing Compounds in the Extracts from the Chinese High-Organic-Sulfur Coals

2020 ◽  
Vol 34 (9) ◽  
pp. 10666-10675
Author(s):  
Yuegang Tang ◽  
Yewei Sun ◽  
Xiaoshuai Wang ◽  
Lulu Yan ◽  
Quan Shi ◽  
...  
Keyword(s):  
Organic Sulfur ◽  
Composition And Structure ◽  
Sulfur Containing ◽  
Sulfur Containing Compounds

scholarly journals Sulfur and Sulfur Compounds in Plant Defence

2012 ◽  
Vol 7 (3) ◽  
pp. 1934578X1200700 ◽  
Author(s):  
Ifeanyi D. Nwachukwu ◽  
Alan J. Slusarenko ◽  
Martin C. H. Gruhlke
Keyword(s):  
Natural Products ◽  
New Technologies ◽  
Plant Defence ◽  
Sulfur Compounds ◽  
Oxidation States ◽  
Chemical Structures ◽  
Wide Range ◽  
Sulfur Containing ◽  
Sulfur Containing Compounds

The multiplicity of chemical structures of sulfur containing compounds, influenced in part by the element's several oxidation states, directly results in diverse modes of action for sulfur-containing natural products synthesized as secondary metabolites in plants. Sulfur-containing natural products constitute a formidable wall of defence against a wide range of pathogens and pests. Steady progress in the development of new technologies have advanced research in this area, helping to uncover the role of such important plant defence molecules like endogenously-released elemental sulphur, but also deepening current understanding of other better-studied compounds like the glucosinolates. As studies continue in this area, it is becoming increasingly evident that sulfur and sulfur compounds play far more important roles in plant defence than perhaps previously suspected.

Sulfatase regulation and antibiotic synthesis in Cephalosporium acremonium

1969 ◽  
Vol 15 (2) ◽  
pp. 175-181 ◽  
Author(s):  
David W. Dennen ◽  
Diane D. Carver
Keyword(s):  
Amino Acid ◽  
Culture Medium ◽  
Sulfur Compounds ◽  
Cephalosporin C ◽  
Cephalosporium Acremonium ◽  
Antibiotic Synthesis ◽  
Cellular Processes ◽  
High Level ◽  
Sulfur Containing ◽  
Sulfur Containing Compounds

The sulfatase of Cephalosporium acremonium is regulated by exogenous sulfur compounds, repressed in cells in 0.02 M sulfate, and derepressed in 5 × 10−4 M sulfate. Organic sulfur sources, such as cysteine, homocysteine, and methionine, derepress the enzyme in varying degrees while the latter amino acid is also required for maximum synthesis of the antibiotics cephalosporin C and penicillin N. Sulfatase-repressed cells transferred from sulfate to methionine-containing medium produce a high level of these antibiotics in the culture medium and a proportionate derepression of the sulfatase. Cycloheximide inhibits sulfatase derepression in cultures transferred from sulfate to methionine medium while having negligible effect on antibiotic synthesis. Mutant cultures of C. acremonium, with an increased potential to synthesize sulfur-containing antibiotics, have decreased ability to degrade methionine for other cellular requirements and sulfatase derepression is proportionately increased. The sulfatase is thus regulated by the biosynthesis of cephalosporin C and penicillin N at the expense of sulfur-containing compounds required for other cellular processes.

Corrosion of stainless steels in acid solutions with organic sulfur-containing compounds

1998 ◽  
Vol 41 (2) ◽  
pp. 321-333 ◽  
Author(s):  
X.L Cheng ◽  
H.Y Ma ◽  
S.H Chen ◽  
R Yu ◽  
X Chen ◽  
...  
Keyword(s):  
Stainless Steels ◽  
Organic Sulfur ◽  
Acid Solutions ◽  
Sulfur Containing ◽  
Sulfur Containing Compounds

Identification and Sources of Impurities in InGaAs Grown by Liquid Phase Epitaxy

1986 ◽  
Vol 90 ◽  
Author(s):  
D. G. Knight ◽  
C. J. Miner ◽  
A. Majeed
Keyword(s):  
High Temperature ◽  
Liquid Phase ◽  
Low Temperature ◽  
Liquid Phase Epitaxy ◽  
High Purity ◽  
Photoluminescence Spectra ◽  
Donor And Acceptor ◽  
Sulfur Containing ◽  
Sulfur Containing Compounds ◽  
Low Temperature Photoluminescence

ABSTRACTHigh purity In.53 Ga.47 As and InP with carrier concentrations [ND–NA] < 5×1015 cm−3 has been grown by the LPE technique on both n-type and semi-insulating substrates to detect and identify trace donor and acceptor impurities. Acceptor impurities have been detected in low temperature photoluminescence spectra where LPE melt baking and growth programs indicate a melt origin for two of these species, one of which is zinc. Data from semiconductor profiles provides evidence for sulfur and tin donor impurities, which comes from the rinse melt used to etch back substrates doped with the respective contaminants. Silicon and sulfur contaminants have been detected by SIMS measurements; and may arise not only from the indium and III-V materials, but also the graphite boat used to grow the epilayers. Volatile sulfur-containing compounds have been detected during high temperature bake-out of high purity graphite boats.

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