CN107754559B - 一种用于气体分离的醇醚复合溶剂及方法 - Google Patents

一种用于气体分离的醇醚复合溶剂及方法 Download PDF

Info

Publication number
CN107754559B
CN107754559B CN201610689435.0A CN201610689435A CN107754559B CN 107754559 B CN107754559 B CN 107754559B CN 201610689435 A CN201610689435 A CN 201610689435A CN 107754559 B CN107754559 B CN 107754559B
Authority
CN
China
Prior art keywords
solvent
gas separation
alcohol ether
composite solvent
polyethylene glycol
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201610689435.0A
Other languages
English (en)
Other versions
CN107754559A (zh
Inventor
毛松柏
赵运生
叶宁
郭本帅
陈小花
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Petroleum and Chemical Corp
Research Institute of Sinopec Nanjing Chemical Industry Co Ltd
Original Assignee
China Petroleum and Chemical Corp
Research Institute of Nanjing Chemical Industry Group Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China Petroleum and Chemical Corp, Research Institute of Nanjing Chemical Industry Group Co Ltd filed Critical China Petroleum and Chemical Corp
Priority to CN201610689435.0A priority Critical patent/CN107754559B/zh
Publication of CN107754559A publication Critical patent/CN107754559A/zh
Application granted granted Critical
Publication of CN107754559B publication Critical patent/CN107754559B/zh
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/14Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
    • B01D53/1456Removing acid components
    • B01D53/1475Removing carbon dioxide
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/14Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
    • B01D53/1425Regeneration of liquid absorbents
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2252/00Absorbents, i.e. solvents and liquid materials for gas absorption
    • B01D2252/20Organic absorbents
    • B01D2252/202Alcohols or their derivatives
    • B01D2252/2023Glycols, diols or their derivatives
    • B01D2252/2026Polyethylene glycol, ethers or esters thereof, e.g. Selexol
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2252/00Absorbents, i.e. solvents and liquid materials for gas absorption
    • B01D2252/20Organic absorbents
    • B01D2252/205Other organic compounds not covered by B01D2252/00 - B01D2252/20494
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2256/00Main component in the product gas stream after treatment
    • B01D2256/16Hydrogen
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02CCAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
    • Y02C20/00Capture or disposal of greenhouse gases
    • Y02C20/40Capture or disposal of greenhouse gases of CO2

Abstract

本发明属气体分离领域,提出了一种用于气体分离的醇醚复合溶剂及方法。本发明通过溶剂复配提高聚乙二醇二甲醚技术吸收二氧化碳的能力,开发出的溶剂可以在低温‑10℃使用。

Description

一种用于气体分离的醇醚复合溶剂及方法
技术领域
本发明属于气体分离领域,涉及一种用于气体特别是二氧化碳与氢气分离的醇醚复合溶剂及方法。
背景技术
聚乙二醇二甲醚简称NHD,是一种优良的气体净化溶剂,广泛应用于变换气、合成气等气源的脱硫脱碳。随着气体净化装置规模的大型化,以聚乙二醇二甲醚为溶剂的技术存在吸收二氧化碳能力有局限性的缺陷。部分复配溶剂并不能在低温下使用。专利CN01127260提出了一种新颖的物理吸收溶剂,该溶剂主体是聚乙二醇二甲醚,另外还有羰基类杂环类活化剂。专利CN200310106564公布了聚乙二醇二甲醚技术在5.0~8.0MPa下的应用,该溶剂为聚乙二醇二甲醚,不含添加剂。专利CN201410332486公布了一种高选择性物理法脱碳吸收剂,该发明将离子液体与聚乙二醇二甲醚复配作为吸收剂。专利CN201510389292公布了一种醇醚胺类气体净化剂,该气体净化剂为醇醚胺或者将醇醚胺与聚乙二醇二甲醚复配。
发明内容
本发明的目的是要通过溶剂复配提高聚乙二醇二甲醚类吸收剂吸收二氧化碳的能力,开发出可以在低温-10℃使用的新型溶剂。
本发明的技术构思是将聚乙二醇二甲醚与其它醇醚复配,依据相似相容的原理,复配溶剂呈均相不分层,-10℃低温下不冻结。依据软硬酸碱理论,提高复配溶剂吸收二氧化碳的能力。
为实现上述目的,本发明主要技术方案:所述的醇醚复合溶剂含有结构式为CH3-O-(CH2CH2O)x-CH3聚乙二醇二甲醚的一种或几种,或还含有结构式为CH3-O-(CH2O)x-CH3聚甲氧基二甲醚的一种或几种,或还含有结构式为CH3CH2-O-(CH2CH2O)x-CH2CH3聚乙二醇二乙醚的一种或几种。
一般地,所述聚乙二醇二甲醚CH3-O-(CH2CH2O)x-CH3的中的X为3~6。
所述聚甲氧基二甲醚CH3-O-(CH2O)x-CH3中的X为2~5。
所述聚乙二醇二乙醚CH3CH2-O-(CH2CH2O)x-CH2CH3中的X为2~3。
所述结构式为CH3-O-(CH2CH2O)x-CH3聚乙二醇二甲醚含量为50%~90%(wt),结构式为CH3-O-(CH2O)x-CH3聚甲氧基二甲醚含量为10%~50%(wt),结构式为CH3CH2-O-(CH2CH2O)x-CH2CH3聚乙二醇二乙醚含量为5%~50%(wt)。
所述从含CO2的气流中分离CO2的醇醚复合溶剂的吸收温度为-10~10℃。
所述吸收了CO2后的醇醚复合溶剂使用N2或空气进行再生。
所述醇醚复合溶剂与CO2接触的传质设备为填料塔。
附图说明
图1:本发明实施例中NHD复配溶剂脱碳流程图。
其中,1-换热器,2-脱碳塔,3-冷却器,4-贫液泵,5-脱碳高闪槽,6-汽提塔。
实施例
下面的实施例将更好地阐述本发明,而不会限制其范围。
实施例1
复配溶剂的组成为:四乙二醇二甲醚50%(wt),CH3-O-(CH2O)3-CH3三甲氧基二甲醚30%(wt),CH3CH2-O-(CH2CH2O)2-CH2CH3二乙二醇二乙醚20%(wt)。测量了CO2在0℃温度条件下在复配溶剂中的溶解度,表格中同时列出测定的CO2在同等条件下在NHD中的溶解度。
实施例2
以下结合技术方案和附图详细叙述本发明的具体实施方式。附图1是本实施例工艺流程示意图。
3.5MPa、5Nm3/h的变换气经过换热器1进入脱碳塔2。变换气含CO244%,H2含量55%,其余为N2。脱碳气含二氧化碳≤0.1%。 吸收了二氧化碳的富液,在脱碳高闪槽5中闪蒸出富液携带的大部分氢气和一部分二氧化碳。
从脱碳高闪槽底部流出的脱碳高闪液进入低闪气提塔上部的低闪段,进一步在较低的压力下继续闪蒸,低压闪蒸气主要是二氧化碳。从低闪段流出的低闪液,向下流经低闪气提塔下部的气提段填料层,与气提气逆流接触,溶液得到再生,由贫液泵加压,贫液流量40L/h,经冷却器冷却,送入脱碳塔,重新用于吸收二氧化碳。贫液中含CH3-O-(CH2CH2O)4-CH3四乙二醇二甲醚50%(wt),CH3-O-(CH2O)3-CH3三甲氧基二甲醚10%(wt),CH3CH2-O-(CH2CH2O)2-CH2CH3二乙二醇二乙醚40%(wt)。

Claims (4)

1.一种用于气体分离的醇醚复合溶剂,其特征在于: 所述的醇醚复合溶剂含有CH3-O-(CH2CH2O)4-CH3四乙二醇二甲醚50%(wt),CH3-O-(CH2O)3-CH3三甲氧基二甲醚30%(wt),CH3CH2-O-(CH2CH2O)2-CH2CH3二乙二醇二乙醚20%(wt)。
2.一种采用权利要求1所述的醇醚复合溶剂进行气体分离的方法,其特征在于:醇醚复合溶剂从含CO2的气流中分离CO2的吸收温度为-10~10℃。
3.根据权利要求2所述的气体分离的方法,其特征在于:吸收了CO2后的醇醚复合溶剂使用N2或空气进行再生。
4.根据权利要求2所 述的气体分离的方法,其特征在于:醇醚复合溶剂与CO2接触的传质设备为填料塔。
CN201610689435.0A 2016-08-19 2016-08-19 一种用于气体分离的醇醚复合溶剂及方法 Active CN107754559B (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610689435.0A CN107754559B (zh) 2016-08-19 2016-08-19 一种用于气体分离的醇醚复合溶剂及方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610689435.0A CN107754559B (zh) 2016-08-19 2016-08-19 一种用于气体分离的醇醚复合溶剂及方法

Publications (2)

Publication Number Publication Date
CN107754559A CN107754559A (zh) 2018-03-06
CN107754559B true CN107754559B (zh) 2020-10-20

Family

ID=61262558

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610689435.0A Active CN107754559B (zh) 2016-08-19 2016-08-19 一种用于气体分离的醇醚复合溶剂及方法

Country Status (1)

Country Link
CN (1) CN107754559B (zh)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN85103897A (zh) * 1985-05-06 1987-10-14 南京化学工业公司研究院 聚醇醚物理溶剂脱除气体中硫化物和二氧化碳
CN1034198A (zh) * 1987-11-06 1989-07-26 日本触媒化学工业株式会社 酸性气体吸收组合物
CN1356158A (zh) * 2001-09-26 2002-07-03 南化集团研究院 一种物理溶剂脱硫脱碳新技术
CN1546206A (zh) * 2003-12-09 2004-11-17 南化集团研究院 一种高压脱除硫化物和二氧化碳的方法
CN1668364A (zh) * 2002-09-17 2005-09-14 弗劳尔公司 除去酸性气体的结构和方法
CN1723073A (zh) * 2002-12-12 2006-01-18 弗劳尔公司 脱除酸性气体的装置和方法
CN102151458A (zh) * 2011-02-28 2011-08-17 清华大学 一种捕集和分离co2的吸收剂及其应用
CN103260726A (zh) * 2010-10-18 2013-08-21 阿克马法国公司 碳氧化物的捕获
US20150166915A1 (en) * 2013-12-12 2015-06-18 Fluor Technology Corporation Configurations and methods of flexible co2 removal

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN85103897A (zh) * 1985-05-06 1987-10-14 南京化学工业公司研究院 聚醇醚物理溶剂脱除气体中硫化物和二氧化碳
CN1034198A (zh) * 1987-11-06 1989-07-26 日本触媒化学工业株式会社 酸性气体吸收组合物
CN1356158A (zh) * 2001-09-26 2002-07-03 南化集团研究院 一种物理溶剂脱硫脱碳新技术
CN1668364A (zh) * 2002-09-17 2005-09-14 弗劳尔公司 除去酸性气体的结构和方法
CN1723073A (zh) * 2002-12-12 2006-01-18 弗劳尔公司 脱除酸性气体的装置和方法
CN1546206A (zh) * 2003-12-09 2004-11-17 南化集团研究院 一种高压脱除硫化物和二氧化碳的方法
CN103260726A (zh) * 2010-10-18 2013-08-21 阿克马法国公司 碳氧化物的捕获
CN102151458A (zh) * 2011-02-28 2011-08-17 清华大学 一种捕集和分离co2的吸收剂及其应用
US20150166915A1 (en) * 2013-12-12 2015-06-18 Fluor Technology Corporation Configurations and methods of flexible co2 removal

Also Published As

Publication number Publication date
CN107754559A (zh) 2018-03-06

Similar Documents

Publication Publication Date Title
US4044100A (en) Separation of acidic gas constituents from gaseous mixtures containing the same
CN105498720A (zh) 一种脱除混和气中h2s、co2和有机硫的固体吸附剂
WO2012169634A1 (ja) 二酸化炭素吸収剤及び該吸収剤を用いた二酸化炭素の分離回収方法
CN101745289B (zh) 从含co2的气体混合物中选择性脱除h2s的方法
EP2991752B1 (en) Mixtures of physical absorption solvents and ionic liquids for gas separation
CN103571545A (zh) 对合成粗煤气选择性脱硫的方法
CN103566735A (zh) 从天然气中脱除硫化物及二氧化碳的吸收液
CN101637689B (zh) 一种捕集或分离二氧化碳的吸收溶剂
US9321004B2 (en) Mixtures of physical absorption solvents and ionic liquids for gas separation
KR101746561B1 (ko) 이산화탄소 흡수제 및 이산화탄소 흡수제의 재생방법
US8641802B2 (en) Method for treating a process gas flow containing CO2
Gao et al. Optimized process configuration for CO2 recovery from crude synthesis gas via a rectisol wash process
CN103157348A (zh) 一种高效低能耗脱硫剂
CN107754559B (zh) 一种用于气体分离的醇醚复合溶剂及方法
CN102974203A (zh) 一种捕集分离二氧化碳的新型吸收剂
JP2018501947A (ja) 二酸化炭素回収のためのエネルギー効率のよい溶媒再生プロセス
CN101637694B (zh) 一种从含co2混合气中分离回收co2的方法
CN106318475A (zh) 低温甲醇洗的改进工艺
AU2012280728A1 (en) Method and device for obtaining gas products
CN105498449B (zh) 一种co2吸收溶液
JP6073088B2 (ja) 高圧二酸化炭素含有ガス流から二酸化炭素を分離回収するための液状吸収剤及び分離回収方法
KR102037878B1 (ko) 이산화탄소 흡수제와 이를 이용한 이산화탄소의 분리방법
US9321005B2 (en) Mixtures of physical absorption solvents and ionic liquids for gas separation
CN105344205A (zh) 一种能从含co2的混合气中选择性脱除h2s的吸收剂
JP6755854B2 (ja) 二酸化炭素を分離回収するための吸収液、及びそれを用いた二酸化炭素を分離回収する方法

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
CP01 Change in the name or title of a patent holder

Address after: Liuhe District of Nanjing City, Jiangsu province 210048 geguan Road No. 699

Patentee after: China Petroleum & Chemical Corp.

Patentee after: SINOPEC NANJING CHEMICAL RESEARCH INSTITUTE Co.,Ltd.

Address before: Liuhe District of Nanjing City, Jiangsu province 210048 geguan Road No. 699

Patentee before: China Petroleum & Chemical Corp.

Patentee before: Nanhua Group Research Institute

CP01 Change in the name or title of a patent holder