Coke and coking

This subsection provides an overview of the production of metallurgical coke and the associated by-products using intermittent horizontal retorts, as well as the pollution prevention practices. Coke and coke by-products, including coke oven... 

Higher delta coke and coke yield, which are associated with residue feedstocks, will result in elevated regenerator temperature and higher combustion air requirements. 

Low volatile bituminous coal and high volatile anthracite coal Subbituminous coal Lignite Coke and coke breeze Wood Bagasse (dry) 11.000- 14,000 9.000- 11,000 7.000- 8,000 12.000- 13,000 8.000- 9,000 7.000- 9,000... 

Naphthalene is produced from coal tar or petroleum. It is made from petroleum by dealkylation of methylnaphthalenes in the presence of hydrogen at high temperature and pressure. Petroleum was a major source of naphthalene until the 1980s, but now most naphthalene is produced from coal tar. The pyrolysis of bituminous coal produces coke and coke oven gases. Naphthalene is condensed by cooling the coke gas and then separated from the gas. Naphthalene production in the United States is slightly greater than 100,000 tons annually. 

Also the presence of coke and coke burning in the regenerator stage can have an effect on the mobility and aging of the non-framework alumina species. This has been proposed to be the case for Vanadium [1, 25]. 

Figure 6. Coking and Coke removal by Fb from 0,3wt%Pt-0.3%wtRe/AbO3.

Uranium is also leached commercially by the same bacteria. Recently, bacterial leaching of gold in Africa has been patented by Pares and co-workers U3). Also, chemical and microbially assisted leaching has been studied and is applied to remove vanadium from by-products of coke and coke ash refinery 112). 

The formation of coke and coke precursors has been discussed in the context of decant oil pyrolysis. However, it should be noted that coking reactions and the compounds in binder pitch that produce coke, also play a critical part in the formation of the finished carbon anode. 

The melt stream from the reducer is passed into a quench tank where its temperature is lowered from 850 to 4M°C by mixing with cooler melt and bv passing through a heat exchanger. The effluent from the quench tanlc is filtered to remove unreacted coke and coke ash and then is passed to the regenerator. 

A test method (ASTM D-1552) is available for sulfur analysis the method covers three procedures applicable to samples boiling above 177°C (350°F) and containing not less than 0.06 mass % sulfur. Thus the method is applicable to most fuel oils, lubricating oils, residua, and coke, and coke containing up to 8% by weight sulfur can be analyzed. This is particularly important for cokes that originate from heavy oil and tar sand bitumen, where the sulfur content of the coke is usually at least 5% by weight. 

The Gray-King and Fischer assays determine the proportions of coke or char (carbonaceous solids), tar (organic liqnids), liquor (ammonia-rich solutions), and gas produced when the coal is carbonized (heated in the absence of air) under laboratory conditions. Hence, they provide a basis for estimating the yields of coke and coke by-products obtained from the coal in an industrial coke oven or oil shale-processing plant. 

Coke and coke chemicals Treatment of (a) sulfurous by-product gas streams from coke gas purification (b) sulfurous gaseous and liquid by-products from benzene, toluene, xylene rectification units... 

In this part, the macrokinetics of the DHP process, which includes propane dehydrogenation, cracking, coking, and coke burning off reaction, is reviewed. Then, the main reaction in DHP, that is, propane dehydrogenation, is studied by microkinetic analysis based on the DPT calculation results. The macrokinetics of DHP is then reexamined. For simplicity, only the results obtained on Pt and Pt-Sn catalysts are discussed here. 

Microkinetic study was also carried out over the Pt-Sn/catalyst, on which we had experimentally studied the kinetic of PDH, coking, and coke buming-off. The particle size of this catalyst was determined to be... 

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