摘要
采用氧化铝色谱柱及索氏抽提的方式对高氮原料分离富集,利用傅里叶变换离子回旋共振质谱仪及GC-MS对分离所得到的碱性氮化物、非碱性氮化物及稠环芳烃结构进行了分析,结果表明:高氮原料中的碱性氮化物一般包括吖啶、环烷基吖啶、氮杂芘;非碱性氮化物主要为苯并咔唑;稠环芳烃以含有3个环的短侧链芳烃为主。对高氮原料的催化裂化生焦机理进行了分析,提出高氮原料催化裂化转化可以通过预处理-FCC组合工艺(物理改质)及分区转化工艺(化学改质)来实现,通过分区转化工艺可以使高氮原料转化率提高5.84百分点,并可改善产品分布,汽油收率提高6.49百分点。
Column-chromatography and Soxhlet extraction methods were used to separate high-nitrogen containing feedstocks. The molecular structure and functional group of the isolated basic nitrogencompounds, non-basic nitrogen compounds and condensed aromatics were characterized by a Fourier transform ion cyclotron resonance mass spectrometry （FT-ICR MS） and GC-MS. The results show that the basic nitrogen compounds are mainly composed of acridines and cycloalkyl-acridines. Benzocarbazoles are of the most relative abundance in non-basic nitrogen compounds. The main polycyclic aromatics are three ring aromatics with short side chain. Based on coking mechanism of FCC process, two suitable processes were proposed for processing high-nitrogen containing feedstocks, the pretreatment- FCC combined process （physical improvement method） and the partition conversion process （chemical improvement method）. The results of partition conversion process show that the conversion and gasoline yield increase 5.84 percentage points and 6.49 percentage points, respectively with improved prod- uct distribution.
出处
《石油炼制与化工》
CAS
CSCD
北大核心
2015年第5期12-18,共7页
Petroleum Processing and Petrochemicals
关键词
高氮原料
催化裂化
生焦机理分
区转化
high-nitrogen containing feedstock
FCC
coking mechanism
partition conversion
