CN108883929A - 基于atr的氨工艺和装置 - Google Patents
基于atr的氨工艺和装置 Download PDFInfo
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- CN108883929A CN108883929A CN201780009261.1A CN201780009261A CN108883929A CN 108883929 A CN108883929 A CN 108883929A CN 201780009261 A CN201780009261 A CN 201780009261A CN 108883929 A CN108883929 A CN 108883929A
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 64
- 238000000034 method Methods 0.000 title claims abstract description 49
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 32
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 40
- 238000003786 synthesis reaction Methods 0.000 claims abstract description 37
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 32
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 32
- 239000003054 catalyst Substances 0.000 claims abstract description 27
- 238000006243 chemical reaction Methods 0.000 claims abstract description 25
- 238000002407 reforming Methods 0.000 claims abstract description 20
- 239000004215 Carbon black (E152) Substances 0.000 claims abstract description 8
- 229930195733 hydrocarbon Natural products 0.000 claims abstract description 8
- 150000002430 hydrocarbons Chemical class 0.000 claims abstract description 8
- JYMITAMFTJDTAE-UHFFFAOYSA-N aluminum zinc oxygen(2-) Chemical compound [O-2].[Al+3].[Zn+2] JYMITAMFTJDTAE-UHFFFAOYSA-N 0.000 claims abstract description 6
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 29
- 230000009466 transformation Effects 0.000 claims description 20
- 238000005406 washing Methods 0.000 claims description 19
- 239000000126 substance Substances 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 229910052783 alkali metal Inorganic materials 0.000 claims description 3
- 150000001340 alkali metals Chemical class 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 230000003647 oxidation Effects 0.000 claims description 2
- 238000007254 oxidation reaction Methods 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 57
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 25
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 13
- 229910052757 nitrogen Inorganic materials 0.000 description 13
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 239000006227 byproduct Substances 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 230000003197 catalytic effect Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- 239000011261 inert gas Substances 0.000 description 3
- KSOKAHYVTMZFBJ-UHFFFAOYSA-N iron;methane Chemical compound C.[Fe].[Fe].[Fe] KSOKAHYVTMZFBJ-UHFFFAOYSA-N 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 238000010926 purge Methods 0.000 description 3
- 239000013589 supplement Substances 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 239000005864 Sulphur Substances 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 229910001567 cementite Inorganic materials 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- MWRWFPQBGSZWNV-UHFFFAOYSA-N Dinitrosopentamethylenetetramine Chemical compound C1N2CN(N=O)CN1CN(N=O)C2 MWRWFPQBGSZWNV-UHFFFAOYSA-N 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000004176 ammonification Methods 0.000 description 1
- 229910052792 caesium Inorganic materials 0.000 description 1
- 229940112112 capex Drugs 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- FEBLZLNTKCEFIT-VSXGLTOVSA-N fluocinolone acetonide Chemical compound C1([C@@H](F)C2)=CC(=O)C=C[C@]1(C)[C@]1(F)[C@@H]2[C@@H]2C[C@H]3OC(C)(C)O[C@@]3(C(=O)CO)[C@@]2(C)C[C@@H]1O FEBLZLNTKCEFIT-VSXGLTOVSA-N 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229910001676 gahnite Inorganic materials 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000007210 heterogeneous catalysis Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 229910052701 rubidium Inorganic materials 0.000 description 1
- 238000005201 scrubbing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
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- C01C1/04—Preparation of ammonia by synthesis in the gas phase
- C01C1/0405—Preparation of ammonia by synthesis in the gas phase from N2 and H2 in presence of a catalyst
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Abstract
一种用于生产氨合成气的方法,所述方法包括以下步骤:‑在重整步骤中重整烃进料,由此获得包含CH4、CO、CO2、H2和H2O的合成气;‑在高温变换步骤中在促进的基于锌‑铝氧化物的高温变换催化剂上变换所述合成气,其中重整步骤中的蒸汽/碳比小于2.6。
Description
跟随当今氨生产中的需求和竞争,已经为开发优化氨生产装置做出了重大努力,目的是提高整体能效并降低资金成本。对于更具成本效益的氨生产的需求促进了用于大规模氨生产单元的技术和催化剂的开发,以便从规模经济中受益。
托普索公司在氨生产技术中的最新创新和新一代最新催化剂的开发确保了高成本效益的氨生产和高装置可靠性,单线产能为5000MTPD氨或更高,而今标准最多只有3300MTPD。
在本发明的第一方面,提供了一种方法,其使得能够利用成熟重整技术以低蒸汽/碳运行的工艺流程。
在本发明的第二方面,提供了一种方法,其使得能够以与重整工段相同的低蒸汽/碳比在重整工段的下游运行高温(HT)变换。
在本发明的第三方面,提供了一种工艺流程,其不需要甲烷化工段来除去用于氨合成的补充合成气中的残余碳组分。
在本发明的第四方面,提供了一种能够实现最大单线产能的整体工艺布局。
这些和进一步的优点通过一种用于生产氨合成气的方法来实现,所述方法包括以下步骤:
-在重整步骤中重整烃进料,由此获得包含CH4、CO、CO2、H2和H2O的合成气;
-在高温变换步骤中在促进的基于锌-铝氧化物的HT变换催化剂上变换所述合成气,其中
-重整步骤中的蒸汽/碳比小于2.6。
HT变换被定义为这样的工艺步骤:其中含有CO、CO2、H2和H2O的合成气在300℃至600℃的温度范围内经受变换反应。
在传统的氨装置中,基于铁的HT变换催化剂的标准使用需要约3.0的蒸汽/碳比以避免形成碳化铁。
(1)
碳化铁的形成将削弱催化剂颗粒,并可能导致催化剂解体和压降增加。
碳化铁将催化费-托(Fischer-Tropsch)副产物形成。
(2)
费-托反应消耗氢气,由此降低了变换工段的效率。
然而,根据本发明,使用非Fe催化剂,例如促进的基于锌-铝氧化物的催化剂。例如,托普索公司的SK-501FlexTM HT变换催化剂,其能够实现重整工段和HT变换工段以低至0.3的蒸汽/碳比运行。
因此,在低至0.3的蒸汽/碳比下运行的本发明的方法不同于当今传统氨装置,传统氨装置基于在2.6或更高的蒸汽/碳比下运行的重整和/或HT变换工段。在本方法的有利的实施方案中,活性形式的基于锌-铝氧化物的催化剂包含锌铝尖晶石和氧化锌的混合物与选自Na、K、Rb、Cs及其混合物的碱金属的组合,并且任选地与Cu组合。基于氧化的催化剂的重量,催化剂可以具有0.5至1.0的Zn/Al摩尔比、0.4至8.0wt%的碱金属的含量和0至10%的铜含量。
根据本发明的方法所使用的HT变换催化剂不受对蒸汽与碳比的严格要求的限制,这使得其可以降低变换工段以及重整工段中的蒸汽/碳比。
小于2.6的蒸汽/碳比具有几个优点。总的来说,降低蒸汽/碳比导致通过重整工段和下游的冷却和合成气制备工段的进料加蒸汽流减少。
与高蒸汽/碳比相比,重整工段和变换工段的低蒸汽/碳比能够实现更高的合成气产量。与在重整工段中添加氮气相比,通过氮气洗涤添加的氮气能够实现更高的合成气产量。没有甲烷化工段减少压力损失并且在氨合成工段中使用不含惰性物质的气体能够在氨合成工段中实现更高的产量。
通过这些工段的质量流量减少意味着设备和管道尺寸更小。质量流量减少还导致低温卡路里(其通常不能被利用)的产生降低。这意味着CAPEX和OPEX都有可能降低。
本发明的方法还可包括以下步骤中的一个或多个:
-在一个或多个中温(MT)/低温(LT)变换步骤中变换HT变换出口气体。MT/LT变换步骤可以任选地以比HT变换更高的蒸汽/碳比进行,以限制诸如甲醇的副产物形成。
-任选地,在水洗中从MT/LT变换出口气体中除去甲醇。
-从MT/LT变换出口气体/水洗出口气体除去CO2,低至低于500ppm的水平,优选低至低于20ppm。
-在分子筛干燥器工段中从离开CO2去除工段的气体中除去残余的CO2和H2O。
-在氮气洗涤工段中从离开分子筛干燥器工段的气体中除去CH4、CO和惰性物质,如Ar和He,并将N2/H2比调节至氨合成所需的约3。
-在无惰性物质的氨合成工段中将来自氮气洗涤的调节的出口气体转化成氨。
在优选的实施方案中,重整步骤包括至少自热重整器(ATR)。
由于与已知技术相比,通过本发明的方法对HT变换步骤中的蒸汽/碳比的要求显著降低,本发明可以将通过前端的蒸汽/碳比降低至0.6或依据可能的变换解决方案(shiftsolution)尽可能低。ATR和整个工艺中具有低蒸汽/碳比的优点在于,由于通过装置的总质量流量较低,因此前端需要较小的设备。
ATR的碳进料在ATR中与氧气和额外的蒸汽混合,并且发生至少两种类型的反应的组合。这两个反应是燃烧和蒸汽重整。
燃烧区:
(3)
(4)
热和催化区:
(5)
(6)
甲烷燃烧成一氧化碳和水(4)是一个高度放热的过程。在所有氧气已被转化后,燃烧区出口处可能存在过量的甲烷。
热区是燃烧室的一部分,其中烃的进一步转化通过均相气相反应进行,主要是(5)和(6)。甲烷的吸热蒸汽重整(5)消耗了燃烧区中产生的大部分热量。
在燃烧室之后,可以存在固定催化剂床,即催化区,其中最终的烃转化通过非均相催化反应进行。在催化区的出口处,合成气优选接近于反应(5)和(6)的平衡。
重整工段中的蒸汽/碳比可以是2.6至0.1、2.4至0.1、2至0.2、1.5至0.3、1.4至0.4,例如1.2、1.0或0.6。
蒸汽/碳比被定义为添加至HT变换工段上游的重整工段的所有蒸汽(即可以经由进料气体、氧气进料通过添加到燃烧器等而添加到重整工段的蒸汽)和添加至重整工段的进料气体中的烃的摩尔比。
因此,根据本发明,可以在重整步骤和高温变换步骤之间不添加额外的蒸汽来运行该工艺。
在有利的实施方案中,ATR中的空速低,例如小于20.000Nm3C/m3/h,优选小于12.000Nm3C/m3/h,最优选小于7000Nm3C/m3/h。空速可以被定义为每催化剂体积的体积碳流量,因此与催化剂区中的转化率无关。
在优选的实施方案中,HT变换步骤中的温度为300至600℃,例如360至470℃。这意味着根据本发明的方法,可以在蒸汽/碳比比已知方法可能的蒸汽/碳比低得多的进料上运行高温变换反应。例如,高温变换入口温度可以是300至400℃,例如350至380℃。
优选地,提供预重整器作为例如ATR上游的重整工段的一部分。在预重整器中,所有高级烃都可以被转化为碳氧化物和甲烷,对于轻质烃,预重整器也是有利的。提供预重整器可以具有若干优点,包括减少ATR中所需的O2消耗并允许更高的ATR入口温度,因为通过预热断裂的风险被最小化。由此达到点火条件。此外,预重整器可以提供有效的硫保护,导致实际无硫的进料气体进入ATR和下游系统。预重整步骤可以在300至650℃,优选390至480℃的温度下进行。
在各种实施方案中,使用火焰加热器来预热天然气进料、预重整器和ATR进料以及用于蒸汽过热。可以通过燃烧天然气、废气(来自N2洗涤)、尾气(来自惰性排出气体分离器)和闪蒸气体(来自CO2去除工段)的混合物来产生必要的热量。
低蒸汽/碳比可以导致低于最佳的变换转化率,这意味着在一些实施方案中,提供一个或多个额外的变换步骤可能是有利的。一个或多个额外的变换步骤可以包括MT变换和/或LT变换和/或HT变换。一般而言,变换步骤中转化的CO越多,则获得的H2越多,且所需的前端越小。
从下面给出的放热变换反应也可以看出这一点。
(7)
在HT变换步骤之后,例如在一个或多个随后的MT或LT变换和/或HT变换步骤之前,可以任选地添加蒸汽,以最大化所述随后的HT、MT和/或LT变换步骤的性能。
具有两个或更多个串联的HT变换步骤(例如包括两个或更多个串联的变换反应器的HT变换步骤,例如可以在其间进行冷却和/或蒸汽添加)可能是有利的,因为它可以在高温下提供增加的变换转化率,这可能减少所需的变换催化剂体积,并因此可能减少资本支出。此外,高温减少了甲醇的形成,而甲醇是典型的变换步骤副产物。
优选地,MT和LT变换步骤可以在促进的铜/锌/氧化铝催化剂上进行。例如,低温变换催化剂类型可以是LK-821-2,其特征为高活性、高强度和对硫中毒的高耐受性。可以安装特殊催化剂的顶层,以捕获气体中可能的氯并防止液滴到达变换催化剂。
MT变换步骤可以在190至360℃的温度下进行。
LT变换步骤可以在Tdew+15至290℃,例如200至280℃的温度下进行。例如,低温变换入口温度为Tdew+15至250℃,例如190至210℃。
降低蒸汽/碳比导致工艺气体的露点降低,这意味着可以降低MT和/或LT变换步骤的入口温度。较低的入口温度可以意味着变换反应器的CO滑动出口较低。
众所周知,MT/LT变换催化剂易于产生甲醇作为副产物。通过增加蒸汽/碳可以减少这样的副产物形成。MT/LT变换后的CO2洗涤需要热量以再生CO2吸收溶液。该热量通常作为来自工艺气体的显热提供,但这并不总是足够的。通常,额外的蒸汽燃烧再沸器提供缺少的热量。任选地向工艺气体中添加蒸汽可以替代该额外的蒸汽燃烧再沸器,并同时确保减少MT/LT变换工段中的副产物形成。
由MT/LT变换催化剂形成的甲醇可以任选地在置于CO2去除步骤的上游或在CO2产物流上的水洗中从合成气中除去。
在许多有利的实施方案中,可以在一个或多个变换步骤之后/下游执行CO2去除步骤。在标准设计中,经处理的气体中的CO2含量为500vppm。
在优选的实施方案中,可以使用CO2去除步骤将CO2含量降低至低于400vppm CO2,例如低于100vppm或者在一些优选的实施方案中降低至20vppm或更低。
该方法可以进一步包括洗涤步骤,优选N2洗涤。N2洗涤可以用于多种目的,例如合成气的纯化以及添加用于下游氨合成的化学计量所需的氮气。
用于N2洗涤单元(NWU)的氮气可以由空气分离单元(ASU)供应,该空气分离单元将大气空气分离成其主要成分为氮气和氧气。氧气用于ATR,氮气用于NWU。
在一个或多个变换工段和CO2去除单元之后,气体可能包含残余的CO和CO2以及少量的CH4、Ar、He和H2O。
优选在N2洗涤之前除去CO2和H2O,否则它们将在N2洗涤的低操作温度下冻结。这可以例如通过在分子筛干燥器中吸附来完成,该干燥器由至少两个容器组成,其中一个在操作而另一个在再生。氮气可以用作用于再生的干燥气体。
在NWU中,合成气在柱中用液氮洗涤,其中CH4、Ar、He和CO被除去。经纯化的合成气优选仅含有ppm水平的Ar和CH4。
含有杂质和一些损失的氮气的废气可以有利地用作火焰加热器中的燃料。
在NWU之后,可以将氮气添加到工艺流中,以便将至氨合成回路的补充流中的N2含量调节到优选的为3的H2/N2比。
因为经纯化的合成气现在仅含有用于氨合成的正确化学计量比的H2和N2加上ppm水平的Ar和CH4,所以氨合成工段可以被认为是无惰性物质的。
当不需要吹扫来自回路的气体时,氨合成回路被定义为无惰性物质的,因为没有这种吹扫,惰性物质的积聚可忽略不计。
实施例
以下位置是指单元的入口。
表1:流量和操作条件。
主要组分
表2:料流组成。位置指图1。
预重整器:T进入/T离开:450/449℃(ΔT=-1℃)
蒸汽/碳比,S/C=0.9预重整器入口
ATR:
工艺气体在650℃下进入ATR,并且氧气的温度约为260℃。
根据说明书中的定义,蒸汽/碳比S/C=1.0
工艺气体在约1025℃下通过耐火材料衬里的出口工段和输送管线离开重整工段至工艺气体冷却工段中的废热锅炉。
变换工段:
HT:T进入/T离开:360/469℃(ΔT=109℃)
LT:T进入/T离开:205/280℃(ΔT=75℃)
重整后,气体中存在约26.7vol%的CO(干基)。在高温CO转化器中,CO含量降低至约11.8vol%,并且温度从360℃升高至469℃。来自高温CO转化器的流出物的热含量在废热锅炉和锅炉进料水预热器中回收。
由此将工艺气体冷却至205℃并传递至低温CO转化器,其中将CO含量降低至约3.8vol%,同时温度升至280℃。
CO2去除工段
来自变换工段的出口流中的CO2含量降低至20ppm。进入CO2去除工段的合成气中的所有甲醇都将与工艺冷凝物和CO2产物流离开该工段。对进入CO2去除工段的合成气进行水洗(参见图2)或对CO2产物流进行水洗可以使CO2产物流中的甲醇含量最小化。
N2洗涤工段
该工段的第一步骤是在分子筛干燥器中定量地除去CO2和H2O。下一步骤是N2液体洗涤,将H2和N2以外的组分去除至ppm水平。第三步骤是使用气态氮将H2/N2比调节至约3。
合成气压缩机:
在离心式两缸合成气压缩机中将合成气从31.4kg/cm2g压缩至185.5kg/cm2g。最后一个缸的一部分形成合成回路中的再循环压缩机。
无惰性物质回路:当不需要吹扫气体系统时,回路可以被定义为惰性。
与补充合成气一起进入回路的少量惰性气体将积聚在回路中,直到溶解在离开排放容器(let-down vessel)的液氨中的惰性气体的量等于进入回路的量。来自排放容器的尾气被再循环回合成气压缩机。
再循环的惰性物质水平取决于溶解在离开氨分离器和排放容器的液氨中的惰性物质的水平。
如果需要,可以通过小气流的间歇吹扫来降低回路中的惰性气体水平。
在该实施例中,离开N2洗涤的经纯化的气体中的惰性物质水平是17ppmAr,在补充气体中为53ppm Ar(在添加来自排放容器的尾气再循环流之后),和在转化器入口为0.30%Ar。
在图2中,显示了另一个实例,其包括甲醇去除工段。
Claims (17)
1.一种用于生产氨合成气的方法,所述方法包括以下步骤:
-在重整步骤中重整烃进料,由此获得包含CH4、CO、CO2、H2和H2O的合成气;
-在高温变换步骤中在促进的基于锌-铝氧化物的HT变换催化剂上变换所述合成气,其中
-重整步骤中的蒸汽/碳比小于2.6。
2.根据权利要求1所述的方法,其中高温变换步骤中的温度为300至600℃,例如345至550℃。
3.根据前述权利要求中任一项所述的方法,其中基于氧化的催化剂的重量,活性形式的促进的基于锌-铝氧化物的HT变换催化剂包含0.5至1.0的Zn/Al摩尔比,以及0.4至8.0wt%的碱金属含量和0至10%的铜含量。
4.根据前述权利要求中任一项所述的方法,其中重整步骤中的蒸汽/碳比为2.6至0.1、2.4至0.1、2至0.2、1.5至0.3或1.4至0.4,例如1.2或1或0.6。
5.根据前述权利要求中任一项所述的方法,其中重整在自热重整器(ATR)中发生。
6.根据前述权利要求中任一项所述的方法,其中ATR中的空速小于20.000Nm3C/m3/h,优选小于12.000Nm3C/m3/h,且最优选小于7000Nm3C/m3/h。
7.根据前述权利要求中任一项所述的方法,还包括预重整步骤。
8.根据前述权利要求中任一项所述的方法,其中高温变换步骤是一个或多个串联的高温变换步骤,优选可以在其间进行冷却和/或蒸汽添加。
9.根据前述权利要求中任一项所述的方法,还包括在高温变换步骤下游的一个或多个额外的变换步骤。
10.根据前述权利要求中任一项所述的方法,其中一个或多个额外的变换步骤是一个或多个中温变换步骤和/或一个或多个低温变换步骤。
11.根据前述权利要求中任一项所述的方法,其中在高温变换步骤下游的一个或多个额外的变换步骤之前,任选地将蒸汽添加到合成气中。
12.根据前述权利要求中任一项所述的方法,其中将离开高温转移步骤下游的一个或多个额外的变换步骤的合成气任选地用水洗涤,以降低甲醇含量。
13.根据前述权利要求中任一项所述的方法,还包括CO2去除步骤,从合成气中将CO2去除至小于400vppm CO2,例如低于100vppm,或在一些优选的实施方案中低至20vppm或更低。
14.根据前述权利要求中任一项所述的方法,还包括N2洗涤步骤。
15.一种用于生产氨的方法,其中氨合成气通过根据权利要求1至14的方法实现。
16.根据权利要求15所述的用于生产氨的方法,其中氨工艺回路是无惰性物质回路。
17.一种装置,其被配置用于实施根据前述权利要求1至16中任一项所述的方法。
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US10941038B2 (en) | 2021-03-09 |
EP3411327A1 (en) | 2018-12-12 |
EA201891734A1 (ru) | 2019-01-31 |
WO2017134162A1 (en) | 2017-08-10 |
AR107517A1 (es) | 2018-05-09 |
BR112018014726A2 (pt) | 2018-12-11 |
CA3010549C (en) | 2023-01-17 |
KR20180111842A (ko) | 2018-10-11 |
CA3010549A1 (en) | 2017-08-10 |
CN108883929B (zh) | 2022-04-26 |
KR102438434B1 (ko) | 2022-09-01 |
TWI732818B (zh) | 2021-07-11 |
MY191228A (en) | 2022-06-09 |
ZA201804078B (en) | 2021-10-27 |
BR112018014726B1 (pt) | 2023-04-18 |
EA039544B1 (ru) | 2022-02-09 |
TW201730099A (zh) | 2017-09-01 |
MX2018008598A (es) | 2018-12-10 |
PL3411327T3 (pl) | 2022-03-14 |
EP3411327B1 (en) | 2021-12-08 |
US20190039886A1 (en) | 2019-02-07 |
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