共查询到20条相似文献,搜索用时 68 毫秒
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选择PAS2050规范作为基本计算依据,利用碳足迹技术对中国石化某炼化企业汽油及柴油生产阶段碳排放进行分析,温室气体核算时间范围为2018年全年。计算结果表明,该企业汽油生产阶段碳排放为0. 256 3 t CO2e/t汽油;柴油生产阶段的碳排放为0. 263 8 t CO2e/t柴油。通过对排放源的碳排放分析发现,燃料气、电及蒸汽为主要碳排放源,生产企业应对这3种排放源进行重点监控。通过对单元装置碳排放分析发现,加氢装置是主要碳排放装置,优化加氢装置氢气来源对实现石化产品生产阶段碳减排具有重要意义。 相似文献
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为应对碳排放权交易体系启动对煤制合成天然气项目经济性的影响,以中海油大同40亿m3/a煤制合成天然气项目为例,根据《中国化工生产企业温室气体排放核算方法与报告指南(试行)》的规定,核算了该项目的碳排放量,根据历史强度下降法,预测了该项目碳排放配额缺口,测算了碳排放成本。结果显示,该项目温室气体排放总量为1 729.176 4万t CO2当量/a,项目进入稳定期后碳配额缺口为85万t CO2当量/a,碳排放成本为7 899万元/a;生命周期内碳配额缺口均值为65万t CO2当量/a,碳排放成本均值为5 557万元/a,对企业经济效益将有较大影响。 相似文献
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涤纶短纤生产线的单线产能已由 80年代的 5 0~ 6 0 t/d发展到 10 0~ 15 0 t/d,增容的主要途径 :前纺增加纺丝位数和喷丝板孔数 ;后加工是加长牵伸辊的长度和提高丝束密度。我国通过对原 5 0 t/d单线产能生产线的成功改造已扩容至 6 0 t/d,已基本具备了自行建设 70~ 10 0 t/d前纺生产线的能力 ,大容量的后加工生产线尚需从国外引进。在建设 15 0 t/d生产线时 ,建议采用“75 t/d× 2前纺生产线 + 15 0 t/d× 1的后加工生产线”的配置方案。 相似文献
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我公司有1 000t/d和2 500t/d生产线各1条,并配套余热发电系统。两条生产线窑尾均采用电除尘器,1 000t/d生产线已投入运行近6年,2 500t/d生产线运行1年,两台电除尘器在余热发电投运后由于烟 相似文献
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SUS304 stainless steel rods were oxidized at 1073 K in air to form oxide film and then immersed in NaOH solution to be polarized cathodically at a cell voltage of 125 V. The electrode emitted light due to the formation of a plasma state at the interface between the electrode surface and the solution caused by the strong electric field applied to the interface. Atomic emission lines of Fe, Cr and Ni were found in the light spectra. The intensity of light was stronger on the oxide layer than on the metal surface. From the time transient of intensities of light, the oxide layer was found to be almost removed from the surface after high-voltage polarization within 10 s. From comparison of experimental results with a model calculation assuming the sputtering of oxide film with bombardment by charged particles in the plasma phase, it was estimated that the removal of surface oxide layer was done by micro-arc discharge mechanism rather than continuous sputtering. Because the formation of micro-arc preferentially occurred on the oxide layer rather than on metal surface, the removal of oxide layer from the surface was considerably rapid. On the other hand, at the point where micro-arc discharge occurred, melting of metal surface was found. 相似文献
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以美国环保局的污染物排放标准形成文件为依据,详细介绍了美国炼焦行业水污染物排放标准,包括BPT、BAT、NSPS、PSNS/PSES、BCT标准。研究了标准的形成过程,分析了标准中各指标的意义。通过标准的制定可以看出美国在污染控制方面的时间表,这对于我国煤化工行业的标准制定和应用具有很好的借鉴作用。 相似文献
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Non-thermal plasma of microwave discharge coupled with gliding discharge was applied to convert nitrous oxide. The experiments were carried out using air or oxygen as carrier gases for N2O (5%). The overall rates of nitrous oxide conversion determined for the N2O + air mixture were slightly higher than those for N2O + oxygen. No significant effect of the carrier gas (air or oxygen) on the rate of N2O → NO conversion was observed. The effect of the power of the microwave discharge and gas flow rate (air) on the overall rate of nitrous oxide conversion and rate of N2O conversion to NO was studied. The increase of the gas flow rate from 200 to 400 N l/h resulted in an increase of the N2O conversion rates both overall (r) and to NO (rNO). For 400 N l/h, both rates were higher by about 80–100% than those determined in the experiments performed with 200 N l/h. 相似文献
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A. A. Khan 《加拿大化工杂志》1989,67(1):113-117
The reaction space of a silent discharge reactor consists of two distinct components, viz. (1) the collection of primary reaction zones (PRZ) or discharge streamers where, under the influence of free electron avalanches, primary electron molecule collisions take place and (2) the remaining reaction space which provides for secondary or quenching reactions between activated species and gas molecules. A flow model based on this concept has been proposed which accounts for the intrinsic chemical activity of the PRZs as well as their random distribution, spatial location, transient nature, and temperature field. Experimental results obtained on laboratory ozonizers have been examined to show the validity of the proposed model. 相似文献
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采用介质阻挡放电(DBD)和旋转电晕放电(RCD)技术研究了二甲醚的转化,发现两者差异很大。从产物分布、转化率及能耗上看,利用RCD所获得的二甲醚的转化率高,几乎不受二甲醚停留时间的影响,且氢气、一氧化碳和不饱和烃的含量大,几乎没有液相产物,而利用DBD能获得较多的液相产物,包括一些醇、醛和含有甲氧基的有机化合物,如甲醛、甲醇和二甲氧基乙烷,且大部分组成都是含有甲氧基的化合物,液相产物的选择性高达32.23%,但是能耗较大。从放电特性上看,RCD能获得较强的脉冲电压和电流,使能量更加集中。 相似文献