Process of synthesizing gasoline and coproducting aromatic hydrocarbon by synthetic gas

Abstract

A kind of synthesis gas synthetic gasoline co-production aromatics technology is to mix methanol synthesis and methanol dehydration catalysts into a slurry bed reactor; ZSM-5 catalyst into a fixed bed reactor, under normal pressure, feed dilute hydrogen ( H2 / N2) performs temperature-programmed reduction on the catalyst in the slurry bed, and the reduction exhaust gas preheats the fixed-bed catalyst. Synthesis gas, in 3.0~7.0MPa, reaction temperature in slurry bed: 260~300℃, gas space velocity: 30000~120000h-1 reaction, reaction product enters fixed bed at equal pressure, fixed bed reaction temperature 300~400℃, gas Space velocity: The synthesis reaction is carried out under the condition of 10000~40000h-1. The invention has the advantages of high gas velocity, good heat transfer, on-line replacement of catalyst, equal pressure operation and low equipment investment.

Description

technical field

[0001] The invention relates to a process for synthesizing gasoline and co-producing aromatics, in particular to a process for synthesizing high-quality gasoline and co-producing aromatics from synthesis gas through methanol and dimethyl ether. Background technique

[0002] The direct conversion of syngas to gasoline is an important way to develop alternative energy sources. The oil synthesized from syngas through the F-T process has a wide carbon number distribution, contains straight-chain aliphatic hydrocarbons, oxygenated compounds and a small amount of aromatics, and has a very low octane number, so it cannot be used as motor gasoline without reforming. However, the gasoline synthesized by the process of methanol and dimethyl ether has a low carbon number, C 5 -C 11 Accounting for 70%, (the content of isomeric hydrocarbons reaches more than 35%). Therefore, the gasoline synthesized by this kind of process can reach 95 octane number without treatment, a...

Examples

Embodiment 1

[0016] The DC207 methanol synthesis catalyst produced by Linqu Daxiang Fine Chemical Co., Ltd. and the γ-Al catalyst produced by Changling Oil Refining and Chemical Co., Ltd. 2 o 3 Methanol dehydration catalysts are mixed at a weight ratio of 5:1 and loaded into a slurry bed reactor; the ZSM-5 catalyst produced by Beijing Bowen Kefeng Technology Development Co., Ltd. is crushed to 20-30 mesh and loaded into a fixed bed reactor. Under normal pressure, 7% (volume ratio) of dilute hydrogen (H 2 / N 2 ) Carry out temperature-programmed reduction of the catalyst in the slurry bed, the reduction procedure is: heating up from room temperature to 120°C at a heating rate of 3°C / min, and keeping the temperature constant for 2 hours; then heating up from 120°C to 180°C at a heating rate of 1°C / min , keep the temperature for 3 hours; then raise the temperature from 180°C to 260°C at a rate of 3°C / min, and keep the temperature for 2 hours. The reduction tail gas passes through the fixed ...

Embodiment 2

[0020] The DC207 methanol synthesis catalyst produced by Linqu Daxiang Fine Chemical Co., Ltd. and the γ-Al produced by Zibo Dongchangye Alumina Co., Ltd. were crushed below 250 mesh 2 o 3 Methanol dehydration catalysts are mixed at a weight ratio of 4:1 and loaded into a slurry bed reactor; the ZSM-5 catalyst produced by Shandong Qilu Huaxin Industrial Co., Ltd. is crushed to 30-40 mesh and loaded into a fixed bed reactor. Under normal pressure, 20% (volume ratio) of dilute hydrogen (H 2 / N 2 ) carry out temperature-programmed reduction on the catalyst in the slurry bed, and the reduction program is: heat up from room temperature to 110°C with a temperature rise rate of 6°C / min, and keep the temperature constant for 3 hours; then heat up from 110°C to 180°C with a temperature rise rate of 3°C / min , keep the temperature for 5 hours; then raise the temperature from 180°C to 250°C at a heating rate of 3°C / min, and keep the temperature for 5 hours. The reduction tail gas passe...

Embodiment 3

[0024] Mix the DC207 methanol synthesis catalyst produced by Linqu Daxiang Fine Chemical Co., Ltd. and the HX001 methanol dehydration catalyst produced by Pingxiang Xingchen Industry Co., Ltd. with a weight ratio of 2:1, and put them into the slurry bed reactor. ; The NKF-5 molecular sieve catalyst produced by Nankai University Catalyst Factory is crushed to 30-40 mesh and loaded into a fixed-bed reactor. Under normal pressure, 10% (volume ratio) of dilute hydrogen (H 2 / N 2) carry out temperature-programmed reduction on the catalyst in the slurry bed, and the reduction program is: heat up from room temperature to 120°C at a heating rate of 5°C / min, and keep the temperature constant for 3 hours; then raise the temperature from 120°C to 170°C at a heating rate of 2°C / min , keep the temperature for 3 hours; then raise the temperature from 170°C to 250°C at a rate of 3°C / min, and keep the temperature for 3 hours. The reduction tail gas passes through the fixed bed catalyst to p...

technical field

[0001] The invention relates to a process for synthesizing gasoline and co-producing aromatics, in particular to a process for synthesizing high-quality gasoline and co-producing aromatics from synthesis gas through methanol and dimethyl ether. Background technique

[0002] The direct conversion of syngas to gasoline is an important way to develop alternative energy sources. The oil synthesized from syngas through the F-T process has a wide carbon number distribution, contains straight-chain aliphatic hydrocarbons, oxygenated compounds and a small amount of aromatics, and has a very low octane number, so it cannot be used as motor gasoline without reforming. However, the gasoline synthesized by the process of methanol and dimethyl ether has a low carbon number, C 5 -C 11 Accounting for 70%, (the content of isomeric hydrocarbons reaches more than 35%). Therefore, the gasoline synthesized by this kind of process can reach 95 octane number without treatment, a...

Examples

Embodiment 1

[0016] The DC207 methanol synthesis catalyst produced by Linqu Daxiang Fine Chemical Co., Ltd. and the γ-Al catalyst produced by Changling Oil Refining and Chemical Co., Ltd. 2 o 3 Methanol dehydration catalysts are mixed at a weight ratio of 5:1 and loaded into a slurry bed reactor; the ZSM-5 catalyst produced by Beijing Bowen Kefeng Technology Development Co., Ltd. is crushed to 20-30 mesh and loaded into a fixed bed reactor. Under normal pressure, 7% (volume ratio) of dilute hydrogen (H 2 / N 2 ) Carry out temperature-programmed reduction of the catalyst in the slurry bed, the reduction procedure is: heating up from room temperature to 120°C at a heating rate of 3°C / min, and keeping the temperature constant for 2 hours; then heating up from 120°C to 180°C at a heating rate of 1°C / min , keep the temperature for 3 hours; then raise the temperature from 180°C to 260°C at a rate of 3°C / min, and keep the temperature for 2 hours. The reduction tail gas passes through the fixed ...

Embodiment 2

[0020] The DC207 methanol synthesis catalyst produced by Linqu Daxiang Fine Chemical Co., Ltd. and the γ-Al produced by Zibo Dongchangye Alumina Co., Ltd. were crushed below 250 mesh 2 o 3 Methanol dehydration catalysts are mixed at a weight ratio of 4:1 and loaded into a slurry bed reactor; the ZSM-5 catalyst produced by Shandong Qilu Huaxin Industrial Co., Ltd. is crushed to 30-40 mesh and loaded into a fixed bed reactor. Under normal pressure, 20% (volume ratio) of dilute hydrogen (H 2 / N 2 ) carry out temperature-programmed reduction on the catalyst in the slurry bed, and the reduction program is: heat up from room temperature to 110°C with a temperature rise rate of 6°C / min, and keep the temperature constant for 3 hours; then heat up from 110°C to 180°C with a temperature rise rate of 3°C / min , keep the temperature for 5 hours; then raise the temperature from 180°C to 250°C at a heating rate of 3°C / min, and keep the temperature for 5 hours. The reduction tail gas passe...

Embodiment 3

[0024] Mix the DC207 methanol synthesis catalyst produced by Linqu Daxiang Fine Chemical Co., Ltd. and the HX001 methanol dehydration catalyst produced by Pingxiang Xingchen Industry Co., Ltd. with a weight ratio of 2:1, and put them into the slurry bed reactor. ; The NKF-5 molecular sieve catalyst produced by Nankai University Catalyst Factory is crushed to 30-40 mesh and loaded into a fixed-bed reactor. Under normal pressure, 10% (volume ratio) of dilute hydrogen (H 2 / N 2) carry out temperature-programmed reduction on the catalyst in the slurry bed, and the reduction program is: heat up from room temperature to 120°C at a heating rate of 5°C / min, and keep the temperature constant for 3 hours; then raise the temperature from 120°C to 170°C at a heating rate of 2°C / min , keep the temperature for 3 hours; then raise the temperature from 170°C to 250°C at a rate of 3°C / min, and keep the temperature for 3 hours. The reduction tail gas passes through the fixed bed catalyst to p...