نتایج جستجو برای: coal pyrolysis

تعداد نتایج: 42335  

2006
E.

Demineralization of coals and coal-derived chars is part of an effort to developalternative fuels from coal. Pyrolysis and some gasification processes yieldchars containing a large fraction of the calorific value of the feed coal andessentially all of its mineral matter. In the work reported here, three gasifi-cation chars produced from anthracite, bituminous, and subbitumin...

Journal: :Bioresource technology 2012
Xiaoli Ren Baohong Liang Min Liu Xiaoyuan Xu Meihua Cui

The objective of this research was to seek a cost effective solution to prepare adsorbents for nitrogen oxide from surplus sludge. Leaf litter and powder coal ash were used as cheap and easily available additives. An adsorbent for nitrogen oxide was prepared by pyrolysis of dried sludge mixed with zinc chloride. Under optimum pyrolysis conditions of 375°C for 90 min and a zinc chloride content ...

2014
Beatriz Acevedo Carmen Barriocanal

Two wastes from the tyre recycling industry -the fibres used as reinforcing material and tyre crumbswere pyrolyzed in two ovens of different configuration. Blends with a low rank coal and a bituminous waste were also prepared to modify the composition of the oils obtained from the pyrolysis of the tyre wastes. Elemental analysis, calorific value, Fourier transform infrared spectroscopy (FTIR) a...

2015
Chuyang Tang Dexiang Zhang Xilan Lu

Co-pyrolysis of Shenmu coal (SM) and cotton stalk (CS) at different blend ratios were carried out in a tubular furnace. The pyrolysis temperature was up to 600 °C at 5 °C/min and kept for 15 min. The results indicated that there was an interactive effect between SM and CS, which increased the tar yield. Moreover, the content of light components in co-pyrolysis tar from all CS/SM blend ratios wa...

2004
Yujue Wang Fred Cannon

Foundries employ green sand molds, which contain coal, silica sand, clay, water, and core binders. This represents one of the largest non-combustion users of coal. When the coal experiences high temperature during the metal casting process, it undergoes pyrolysis reactions and can generate significant amounts of volatile organic compounds. Some of the compounds are released as hazardous air pol...

Iftikhar Ahmad Awan Imtiaz Ahamd Jan Nisar, Khalid Khan Niamat Ullah

Thermal decomposition of two coal samples obtained from Top Seam Sibi (TSS) and Sore Range Quetta (SRQ) coal fields in their raw and acid washed forms were carried out in an open type tubular pyrolyzer coupled to a gas chromatograph with FID. Elemental analyses were carried out with Scanning Electron Microscope-Energy Dispersive X-rays (SEM-EDX) analyzer. Effect of inherent mineral contents...

2014
Singfoong Cheah Shealyn C. Malone Calvin J. Feik

The effects of feedstock type and biomass conversion conditions on the speciation of sulfur in biochars are not well-known. In this study, the sulfur content and speciation in biochars generated from pyrolysis and gasification of oak and corn stover were determined. We found the primary determinant of the total sulfur content of biomass to be the feedstock from which the biochar is generated, w...

2002
Cezary Czosnek Jerzy F. Janik Zbigniew Olejniczak

Poly(carbosilane) or PCS, {–CH2–SiH(CH3)–}n, is used as a Si-bearing precursor in combination with a coal tar pitch to study thermally induced transformations toward SiC-modified carbon composites. Following mixing of the components in the molten pitch at 160oC, the mixture is heated under argon atmosphere at 500oC yielding a solid carbonizate that is further subjected to separate pyrolysis exp...

2009
Abdul Ali N. K. Srivastava S. K. Srivastava R. N. Goswami S. K. Hazra

In order to utilize high sulfur (3-6%) coals in various industries which otherwise cannot be utilized directly or even as a blend, studies on pyrolysis of four high sulfur NE regions Indian coals viz. 60ft Tikak, 20ft Tikak, Surupi and Bapung coal from Makum Coalfields of Meghalaya in presence of hydrogen were carried out at 900C. The steam was generated by heating waste water followed by its s...

Journal: :The Journal of the Society of Chemical Industry, Japan 1962

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