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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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sltmac: 金币+1 2012-08-05 09:14:48
sltmac: 金币+30, 翻译EPI+1 2012-08-26 08:14:48
sltmac: 金币+1 2012-08-05 09:14:48
sltmac: 金币+30, 翻译EPI+1 2012-08-26 08:14:48
 计的催化剂可以给炼油厂带来特定的性能目标，比如说在不用花大代价改制机器的条件下能改善活性或者选择性。目前提供给国内外炼油厂的FCC催化剂中，大部分是基于此技术。 那些炼油厂FCC单元或受限于可承受的最高再生温度，或受限于鼓风机容量，迫使炼油厂寻求提高选择性的方案，以减少焦炭的生成。而气体压缩机极限使得这种还原气体催化剂是非常可取的。似乎结焦率降低一点就可以给现在的有鼓风机风量和再生温度限制的FCC单元操作带来巨大的经济利益。 （最后两句话中几个make我看不懂，不知道是写错了，还是用作名词，还请互相学习交流。谢谢） |
2楼2012-08-01 22:19:35
3楼2012-08-04 20:52:11