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| The aforementioned technology has met widespread commercial success. Because of the availability of high zeolite content microspheres which are also attrition-resistant, custom designed catalysts are now available to oil refineries with specific performance goals, such as improved activity and/or selectivity without incurring costly mechanical redesigns. A significant portion of the FCC catalysts presently supplied to domestic and foreign oil refiners is based on this technology. Refineries whose FCC units are limited by the maximum tolerable regenerator temperature or by air blower capacity seek selectivity improvements resulting in reductions in coke make while the gas compressor limitations make catalysts that reduce gas make highly desirable. Seemingly a small reduction in coke can represent a significant economic benefit to the operation of an FCC unit with air blower or regenerator temperature limitations. |
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【答案】應(yīng)助回帖
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sltmac: 金幣+1 2012-08-05 09:14:48
sltmac: 金幣+30, 翻譯EPI+1 2012-08-26 08:14:48
sltmac: 金幣+1 2012-08-05 09:14:48
sltmac: 金幣+30, 翻譯EPI+1 2012-08-26 08:14:48
 計的催化劑可以給煉油廠帶來特定的性能目標(biāo)，比如說在不用花大代價改制機(jī)器的條件下能改善活性或者選擇性。目前提供給國內(nèi)外煉油廠的FCC催化劑中，大部分是基于此技術(shù)。 那些煉油廠FCC單元或受限于可承受的最高再生溫度，或受限于鼓風(fēng)機(jī)容量，迫使煉油廠尋求提高選擇性的方案，以減少焦炭的生成。而氣體壓縮機(jī)極限使得這種還原氣體催化劑是非常可取的。似乎結(jié)焦率降低一點(diǎn)就可以給現(xiàn)在的有鼓風(fēng)機(jī)風(fēng)量和再生溫度限制的FCC單元操作帶來巨大的經(jīng)濟(jì)利益。 （最后兩句話中幾個make我看不懂，不知道是寫錯了，還是用作名詞，還請互相學(xué)習(xí)交流。謝謝） |
2樓2012-08-01 22:19:35
3樓2012-08-04 20:52:11
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