Exact(1)
Its main raw materials are the fossil fuels (coal, natural gas, and petroleum), air, water, salt, limestone, sulfur or an equivalent, and some specialized raw materials for special products, such as phosphates and the mineral fluorspar.
Similar(59)
On hydrogen fuel cells, they have the potential to solve several economic and environmental challenges: America's dependence on petroleum imports, poor air quality, and greenhouse gas emissions.
"We recently visited Nigeria to carry out new research and visited some of the same sites, and we found there is still visible pollution — standing oil and a heavy smell of petroleum in the air".
Chevron's spokespeople have gone as far as to say that the disease is due to lack of sanitation and poverty which seems ludicrous when spending time with these villages and waking up to the smell of petroleum in the air.
In both males and females, residential exposure to petroleum and chemical air emissions was associated with an increased incidence of cancer of the buccal cavity and pharynx.
It can be seen from Table 4 that the bubble-PCWS could obtain the biggest yield stress when the operational parameters were set as follows, aeration time of 30 min, solid concentration of 65 wt%, frother dosage of 0.030 wt% of the air-dried pulverized petroleum coke, aperture size of air distribution plate of 2 5 μm and AOS frother.
According to range analysis of orthogonal experimental results, the integrated optimal levels of multiple factors for the greatest yield stress were as follows, aeration time of 30 min, solid concentration of 65 wt%, frother dosage of 0.030 wt% of the air-dried pulverized petroleum coke, aperture size of air distribution plate of 2 5 μm and AOS frother.
The optimal levels of multiple factors for the greatest yield stress were as below, aeration time of 30 min, solid concentration of 65 wt%, frother dosage of 0.030 wt% of the air-dried pulverized petroleum coke, aperture size of air distribution plate of 2 5 μm and AOS frother type.
The optimal conditions for the greatest yield stress were as follows: aeration time of 30 min, solid concentration of 65 wt%, frother dosage of 0.030 wt% of the air-dried pulverized petroleum coke, aperture size of air distribution plate of 2 5 μm and AOS frother.
Hence, the combination condition with aeration time of 30 min, solid concentration of 65 wt%, frother dosage of 0.030 wt% of the air-dried pulverized petroleum coke, aperture size of air distribution plate of 2 5 μm and AOS frother was the integrated optimal levels of multiple factors for the greatest yield stress and the best stability within the experimental range.
Lavelle told me that he had bombed radar sites, air fields, petroleum storage tanks, and other targets in the North without express orders.
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