In a testing of petrolic engine, about 70% to 80% of nonmethane hydrocarbon is emitted into atmosphere without catalysis conversion in theoment of coldstart, so that serious pollution is produced.
This article analyze the condition of demethanizer after revamping. The operation state afterwards the revamp is summarized and further optimization of the demethanizer is given in the paper.
Objective: To observe the effect of selenium on the TSH positive cells in the pituitary pars distalis of rat with colon mucosa cancer induced by azoxymethane (AOM).
This article analyzes main factors that affect the actual operation of Demethanizer,and discusses the problems existing in the Demethanizer after the revamp of ethylene plant in Fushun,CCPC.
Glycerin is validated as a good solvent in extracting DEM-ethanol liquid-liquidly, and thus the necessary basic data has been provided for industry extracting devices.
The ubiquity of phenanthrene series, chrysene series compounds, perylene and retene compounds in the sediment indicated that PAHs mainly came from the terrestrial plants.
Copper conductive adhesives were prepared using epoxy as matrix, the mixture of m-phenylenediamine and diaminodiphenylmethane as hardener, and copper particles as the conducting filler.
Desorption chemical ionization mass spectrometry of twelve metallohematoporphyrin complexes has been investigated under DEP condition using mixture of tetramethylsilane and methane as regent gas.
The technology of two phase anaerobic digestion have a series of characteristics and advantages because of the separation of acidogenic phase and methanogenic phase.
The oxidative dimerization of aryl methanes in organic solvents by using alkaline catalysts is an important way to prepare diphenyl ethanes and diphenyl ethylenes.
Thermokarst failures occur when permafrost—a layer of frozen soil in Earth's polar regions—thaws and becomes unstable, possibly releasing greenhouse gases into the atmosphere.
According to the literature, sarcina is oneof the methanogen that can produce methane in high performance.The remaining of sarcina willapparently improve methane production.
The hydroxyl value of epoxy-containing polyester was determined by analyzing acetification principle and using acetyl chloride as acetifier and methylene chloride as solvent.
A new method of gas chromatographic analyses in the production of chloroacetic acid for process control using diazomethane as esterification agent is studied.
It can also be prepared by reaction of bromochloromethane with sodium thiocyanate to obtain chloromethyl thiocyanate, and then it reacts with 2-mercapto-benzothiazole.
For a start, all animals, such as cows, pigs and sheep, always gas limed methane, which is the second most common green house gas after carbon dioxide.
It was discovered that living plants emit 10 to 100 times more methane than dead plants. Scientists had previously thought that plants could only emit methane in the absence of oxygen.
They believe there's methane gas around Pluto that's more concentrated at its higher altitudes and that's where it forms froth on the dwarf planet's mountain tops without the need for wind or precipitation.
Normally, rice needs 25 cycles of flooding and drying out to grow, but using AWD this is reduced to 20 cycles, saving farmers water and reducing methane emissions.
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丁
阶段没有经催化转化而直接排入大气中,造成严重污染。
第二大常见
一卷牛皮胶布吗?
亚
