Mesophase spheres were prepared through homogeneous and heterogeneous nucleation from two coal tar pitches with some and nearly without quinoline insolubles. The pitches suffered thermal condensation in a stainless steel reactor at 440 and 410 for 1 or 7h, respectively. SEM was introduced as a useful tool to detect the structures of the two kinds of mesophase spheres. As a result of the paper, ...

OBJECTIVE To present results of a bladder cancer screening program conducted in 18 aluminum smelters in the United States from January 2000 to December 2010. METHODS Data were collected on a cohort of workers with a history of working in coal tar pitch volatile exposed areas including urine analysis for conventional cytology and ImmunoCyt/uCyt+ assay. RESULTS ImmunoCyt/uCyt+ and cytology in...

The main purpose of this study is to investigate the thermal stability and mechanism decomposition Mogoin gol coal, possibility liquefaction by pyrolysis thermolysis, enriching heavy liquids reduce mineral content coal improve its quality. Under purpose, was characterized proximate ultimate analysis, thermogravimetry, investigated (thermolysis pyrolysis). Thermogravimetric analysis performed us...

Although ultraviolet radiation may be an important etiologic factor for BCCs on sun-exposed areas, the cause of their occurrence on areas not exposed to sun has not been identified. Chronic skin irritation, previous trauma, exposure to ionizing radiation, coal tar and other carcinogens or immunosuppressive drugs may be responsible for the development of tumors at uncommon sites.[1,2] In our cas...

Environmental protection agencies strictly regulate the presence of PAHs in air, water, soil, industrial, and food because this group of chemicals varies in structure and toxicity. The analysis of drinking water for the presence of PAHs is important as coal tar is normally used to protect distribution pipes from corrosion and therefore can be considered the main source of PAHs in drinking water...

Remediation of coal tar at former Manufactured Gas Plant (MGP) sites, and creosote associated with wood preservative sites is challenging due to the viscous nature of the dense non-aqueous phase liquid (DNAPL) and the modest solubility and vapor pressure of the contaminants of concern (COCs). DNAPL seepage into surface water bodies, as well as groundwater plumes formed by the most mobile consti...

The effect of alumina and tough nylon 66 on microparticles’ presence the mechanical and thermal properties of epoxy adhesives is assessed here. In order to distribute the adhesive formulation components, in a uniform manner a mechanical stirrer is applied. The effect a combined percentage of nylon66 at (20،30،40 pph) and alumina micro-particles 20 μ (50,60,70 pph) selected based on Taguchi expe...

Rubber wood (Ficus elastica) is one the biomass waste that can be used as raw material for a gasification process and has a calorific value of 4,069 cal/gram. Gasification is a process to convert a solid fuel to syngas (CO, CH4, and H2) through a combustion process using limited air between 20% to 40% of air stoichiometry. Depending on the direction of airflow, the gasifiers are classified as u...