阅读说明：本技术 一种汽油中辛烷值的测定方法 (Method for measuring octane number in gasoline ) 是由 陆裕聪 于 2020-12-21 设计创作，主要内容包括：本发明公开了一种汽油中辛烷值的测定方法,包括以下步骤：S1、取样汽油样品；S2、测试汽油样品最大爆震值；S3、将数据输入数据储存器中；S4、通过数据处理器的比对计算,得出汽油样品的辛烷值；S5、汽油样品蒸馏；S6、将从蒸馏塔的塔顶中取出的汽油按95℃切割成两个部分,95℃前的是汽油轻组分,95℃后的是汽油重组分；S7、分别测试汽油轻组分和汽油重组分的辛烷值,根据两者的辛烷值差距测定该汽油辛烷值分布是否均匀；S8、根据步骤S4与步骤S7的结果,得出汽油样品的辛烷值与质量。本发明所述的一种汽油中辛烷值的测定方法,其操作方法简便,高效、准确、全自动的测定汽油辛烷值,并快速判断汽油的质量。(The invention discloses a method for determining octane number in gasoline, which comprises the following steps: s1, sampling a gasoline sample; s2, testing the maximum knock value of the gasoline sample; s3, inputting data into a data storage; s4, obtaining the octane number of the gasoline sample through comparison calculation of the data processor; s5, distilling a gasoline sample; s6, cutting the gasoline taken out from the top of the distillation tower into two parts at 95 ℃, wherein the gasoline light component is at the temperature of 95 ℃ and the gasoline heavy component is at the temperature of 95 ℃; s7, testing the octane numbers of the light components and the heavy components of the gasoline respectively, and determining whether the octane number distribution of the gasoline is uniform or not according to the difference of the octane numbers of the light components and the heavy components of the gasoline; and S8, obtaining the octane number and the quality of the gasoline sample according to the results of the step S4 and the step S7. The method for measuring the octane number in the gasoline has the advantages of simple operation method, high efficiency, accuracy and full-automatic measurement of the octane number of the gasoline, and rapid judgment of the quality of the gasoline.)

1. A method for measuring octane number in gasoline is characterized in that: the method comprises the following steps:

s1, sampling a gasoline sample;

s2, testing the maximum knock value of the gasoline sample, searching the liquid level height by adopting an octane number measuring device, and testing and recording the corresponding maximum knock value;

s3, inputting data, inputting the maximum knock value recorded in the step S2 into a data storage;

s4, obtaining the octane number of the gasoline sample through comparison calculation of the data processor;

s5, distilling a gasoline sample, putting the tested gasoline into a distillation tower with a molecular sieve catalyst for fractionation, introducing the fractionated sulfur-containing gasoline into the distillation tower from a reaction section of the distillation tower, and taking the desulfurized gasoline out of the top of the distillation tower; the pressure in the distillation tower is 0.25-0.45MPa, and the temperature of the distillation reaction section is 125-170 ℃;

s6, cutting the gasoline taken out from the top of the distillation tower into two parts at 95 ℃, wherein the gasoline light component is at the temperature of 95 ℃ and the gasoline heavy component is at the temperature of 95 ℃;

s7, testing the octane numbers of the light gasoline component and the heavy gasoline component according to the steps S2-S4, when the octane number difference between the light gasoline component and the heavy gasoline component is larger than 2.5, considering that the octane number distribution of the gasoline is uneven, and when the octane number difference between the light gasoline component and the heavy gasoline component is smaller than or equal to 2.5, considering that the octane number distribution of the gasoline is even;

and S8, obtaining the octane number and the quality of the gasoline sample according to the results of the step S4 and the step S7.

2. A method as claimed in claim 1, characterized in that: the gasoline sample of step S1 includes catalytically cracked gasoline, catalytically reformed gasoline, straight run gasoline, catalytically cracked gasoline, hydrogenated gasoline, or coker gasoline.

3. A method as claimed in claim 1, characterized in that: in step S2, the height of the liquid level is searched for a height corresponding to the maximum knock value displayed in the process when the knock value changes from small to large and from large to small, and the liquid level height and the corresponding maximum knock value are recorded.

4. A method of determining the octane number of a gasoline as defined in claim 3, wherein: and adjusting to the recorded liquid level height, recording the maximum detonation value of the liquid level height, compounding whether the detonation value is close to the recorded maximum detonation value or not, if the error is larger, repeatedly adjusting, and if not, determining that the maximum detonation value is found.

5. A method as claimed in claim 1, characterized in that: the data storage in the step S3 stores a database, and the database contains data of knocking generated by various gasolines having octane numbers ranging from-30 to 120 and having an octane number interval of 1 under different conditions.

6. The method of claim 5 for determining the octane number of a gasoline, wherein: the data in the database are from the property data records of gasoline samples generated by various processes, and the total gasoline sample data amount is about 500-1000.

7. A method as claimed in claim 1, characterized in that: before the distillation of the gasoline sample in the step S5, the gasoline raw material is put into a preprocessor, and the preprocessed gasoline is preheated and then is introduced into a reaction section of a distillation tower.

8. The method of claim 7 for determining the octane number of a gasoline, wherein: the ion exchange resin is filled in the preprocessor, and the temperature of the preprocessor is 45 ℃ and the pressure is 0.15 MPa.

Technical Field

The invention belongs to the technical field of gasoline evaluation, and particularly relates to a method for determining octane number in gasoline.

Background

Gasoline production is an important link in the petroleum refining industry. Countries have strict index requirements on the quality of gasoline, wherein octane number is the first quality index of gasoline specifications. The method is characterized in that the gasoline octane number is measured by obtaining the maximum knock index after a gasoline octane number measuring machine performs real-time combustion operation and then comparing the maximum knock index with the maximum knock indexes of two standard oil samples, wherein the maximum knock index is obtained under the condition of a proper air-oil mixture ratio, so that the determination of the maximum knock intensity mixture ratio is the key for measuring the gasoline octane number.

In fact, the gasoline is a mixture of C4 to C12, the octane number specified in the national standard is the average octane number of the mixture, the distribution of the octane number from C4 to C12 is not reflected, and the same No. 93 gasoline has the advantage that the oil consumption with uneven octane number distribution is far greater than that with even distribution, so the research on the octane number distribution of the gasoline has important significance. The octane number distribution was previously tested and only roughly evaluated and tested from the perspective of gasoline composition, which makes gasoline blending lack scientific grounds.

Disclosure of Invention

The purpose of the invention is as follows: in order to overcome the defects, the invention aims to provide the method for measuring the octane number in the gasoline, which has the advantages of simple operation method, high efficiency, accuracy and full-automatic measurement of the octane number of the gasoline and rapid judgment of the quality of the gasoline.

The technical scheme is as follows: a method for determining octane number in gasoline comprises the following steps:

s1, sampling a gasoline sample, wherein the gasoline sample comprises catalytic cracking gasoline, catalytic reforming gasoline, straight run gasoline, catalytic cracking gasoline, hydrogenated gasoline or coker gasoline;

s2, testing the maximum detonation value of one liquid level height of the gasoline sample, searching the liquid level height by adopting an octane number measuring device, and testing and recording the corresponding maximum detonation value;

s3, inputting data, inputting the maximum knock value recorded in the step S2 into a data storage;

s4, obtaining the octane number of the gasoline sample through comparison calculation of the data processor;

s5, distilling a gasoline sample, putting the tested gasoline into a distillation tower with a molecular sieve catalyst for fractionation, introducing the fractionated sulfur-containing gasoline into the distillation tower from a reaction section of the distillation tower, and taking the desulfurized gasoline out of the top of the distillation tower; the pressure in the distillation tower is 0.25-0.45MPa, the temperature of the distillation reaction section is 125-170 ℃, and the catalyst can also be an ion exchange resin catalyst;

s6, cutting the gasoline taken out from the top of the distillation tower into two parts at 95 ℃, wherein the gasoline light component is at the temperature of 95 ℃ and the gasoline heavy component is at the temperature of 95 ℃;

s7, testing the octane numbers of the light gasoline component and the heavy gasoline component according to the steps S2-S4, when the octane number difference between the light gasoline component and the heavy gasoline component is larger than 2.5, considering that the octane number distribution of the gasoline is uneven, and when the octane number difference between the light gasoline component and the heavy gasoline component is smaller than or equal to 2.5, considering that the octane number distribution of the gasoline is even;

and S8, obtaining the octane number and the quality of the gasoline sample according to the results of the step S4 and the step S7.

Further, in the method for determining octane number in gasoline, in step S2, the liquid level height is searched for and the liquid level height of the oil level is adjusted in one direction, and the height corresponding to the maximum knock value displayed in the process when the knock value changes from small to large and from large to small is recorded. And adjusting to the recorded liquid level height, recording the maximum detonation value of the liquid level height, compounding whether the detonation value is close to the recorded maximum detonation value or not, if the error is larger, repeatedly adjusting, and if not, determining that the maximum detonation value is found.

Further, in the method for determining octane number in gasoline, the data storage in step S3 stores a database, and the database contains data of knocking produced by various kinds of gasoline with octane number ranging from-30 to 120 and octane number interval of 1 under different conditions.

Further, in the method for determining octane number in gasoline, the data in the database are from the records of property data of gasoline samples (including catalytically cracked gasoline, catalytically reformed gasoline, straight run gasoline, catalytically cracked gasoline, hydrogenated gasoline or coker gasoline) generated by various processes, and the total data amount of the gasoline samples is about 500-1000.

Further, in the above method for determining octane number in gasoline, before distilling the gasoline sample in step S5, the gasoline raw material is put into a preprocessor, the preprocessor is filled with ion exchange resin, the temperature of the preprocessor is 45 ℃, the pressure is 0.15MPa, and the preprocessed gasoline is preheated and then is introduced into the reaction section of the distillation tower.

The technical scheme shows that the invention has the following beneficial effects: the operation method is simple, convenient, efficient, accurate and full-automatic to measure the octane number of the gasoline; the phenomenon that the environment pollution is increased due to the fact that the content of sulfide in tail gas emission of gasoline is ultrahigh due to uneven octane number distribution of the gasoline is reduced, and the quality of the gasoline is judged quickly.

Detailed Description

The invention will be further elucidated with reference to the following specific examples.

Reference will now be made in detail to the embodiments of the present invention, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The following described embodiments are exemplary and are intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "clockwise," "counterclockwise," and the like are used in an orientation or positional relationship indicated for convenience in describing the invention and to simplify the description, but are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Example 1

A method for determining octane number in gasoline comprises the following steps:

s1, sampling a gasoline sample, wherein the gasoline sample comprises catalytic cracking gasoline, catalytic reforming gasoline, straight run gasoline, catalytic cracking gasoline, hydrogenated gasoline or coker gasoline;

s2, testing the maximum detonation value of the liquid level height of the gasoline sample, searching the liquid level height by adopting an octane number measuring device, adjusting the liquid level height of the oil level in one direction, wherein the detonation value is changed from small to large and from large to small, and recording the corresponding liquid level height and the corresponding maximum detonation value of the maximum detonation value displayed in the process; adjusting to the recorded liquid level height, recording the maximum detonation value of the liquid level height, compounding whether the detonation value is close to the recorded maximum detonation value or not, if the error is larger, repeatedly adjusting, otherwise, considering that the maximum detonation value is found; testing and recording a corresponding maximum knock value;

and S3, inputting data, and inputting the maximum knock value recorded in the step S2 into a data storage. The data storage device stores a database, the database contains data of knocking generated by various gasolines with octane numbers ranging from minus 30 to 120 and interval of 1 under different conditions, the data is from the property data record of gasoline samples (including catalytic cracking gasoline, catalytic reforming gasoline, straight-run gasoline, catalytic cracking gasoline, hydrogenated gasoline or coking gasoline) generated by various processes, and the total data amount of the gasoline samples is about 500-1000;

and S4, comparing and calculating the data in the database through the data processor to obtain the octane number of the gasoline sample.

Example 2

A method for determining octane number in gasoline comprises the following steps:

s1, sampling a gasoline sample, wherein the gasoline sample comprises catalytic cracking gasoline, catalytic reforming gasoline, straight run gasoline, catalytic cracking gasoline, hydrogenated gasoline or coker gasoline;

s2, testing the maximum detonation value of the liquid level height of the gasoline sample, searching the liquid level height by adopting an octane number measuring device, adjusting the liquid level height of the oil level in one direction, wherein the detonation value is changed from small to large and from large to small, and recording the corresponding liquid level height and the corresponding maximum detonation value of the maximum detonation value displayed in the process; adjusting to the recorded liquid level height, recording the maximum detonation value of the liquid level height, compounding whether the detonation value is close to the recorded maximum detonation value or not, if the error is larger, repeatedly adjusting, otherwise, considering that the maximum detonation value is found; testing and recording a corresponding maximum knock value;

and S3, inputting data, and inputting the maximum knock value recorded in the step S2 into a data storage. The data storage device stores a database, the database contains data of knocking generated by various gasolines with octane numbers ranging from minus 30 to 120 and interval of 1 under different conditions, the data is from the property data record of gasoline samples (including catalytic cracking gasoline, catalytic reforming gasoline, straight-run gasoline, catalytic cracking gasoline, hydrogenated gasoline or coking gasoline) generated by various processes, and the total data amount of the gasoline samples is about 500-1000;

s4, comparing and calculating the data in the database through the data processor to obtain the octane number of the gasoline sample;

s5, distilling a gasoline sample, putting the tested gasoline into a distillation tower with a molecular sieve catalyst for fractionation, introducing the fractionated sulfur-containing gasoline into the distillation tower from a reaction section of the distillation tower, and taking the desulfurized gasoline out of the top of the distillation tower; the pressure in the distillation tower is 0.25-0.45MPa, the temperature of the distillation reaction section is 125-170 ℃, and the catalyst can also be an ion exchange resin catalyst;

s6, cutting the gasoline taken out from the top of the distillation tower into two parts at 95 ℃, wherein the gasoline light component is at the temperature of 95 ℃ and the gasoline heavy component is at the temperature of 95 ℃;

s7, testing the octane numbers of the light gasoline component and the heavy gasoline component according to the steps S2-S4, when the octane number difference between the light gasoline component and the heavy gasoline component is larger than 2.5, considering that the octane number distribution of the gasoline is uneven, and when the octane number difference between the light gasoline component and the heavy gasoline component is smaller than or equal to 2.5, considering that the octane number distribution of the gasoline is even;

and S8, obtaining the octane number and the gasoline quality of the gasoline sample according to the results of the step S4 and the step S7.

Before the distillation of the gasoline sample, the gasoline raw material is put into a preprocessor, the preprocessor is filled with ion exchange resin, the temperature of the preprocessor is 45 ℃, the pressure is 0.15MPa, and the preprocessed gasoline is preheated and then is put into a reaction section of a distillation tower.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that modifications can be made by those skilled in the art without departing from the principle of the present invention, and these modifications should also be construed as the protection scope of the present invention.