CN110225788A - 一种从工业气体进料中去除氧气的方法 - Google Patents
一种从工业气体进料中去除氧气的方法 Download PDFInfo
- Publication number
- CN110225788A CN110225788A CN201880008225.8A CN201880008225A CN110225788A CN 110225788 A CN110225788 A CN 110225788A CN 201880008225 A CN201880008225 A CN 201880008225A CN 110225788 A CN110225788 A CN 110225788A
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- Prior art keywords
- gas
- oxygen
- siloxanes
- heated
- feed gas
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- 239000001301 oxygen Substances 0.000 title claims abstract description 41
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 41
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims description 31
- 239000007789 gas Substances 0.000 claims abstract description 84
- 150000001875 compounds Chemical class 0.000 claims abstract description 24
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 23
- LCGLNKUTAGEVQW-UHFFFAOYSA-N Dimethyl ether Chemical compound COC LCGLNKUTAGEVQW-UHFFFAOYSA-N 0.000 claims abstract description 18
- SCPYDCQAZCOKTP-UHFFFAOYSA-N silanol Chemical compound [SiH3]O SCPYDCQAZCOKTP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 14
- 239000011593 sulfur Substances 0.000 claims abstract description 14
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 12
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000006243 chemical reaction Methods 0.000 claims abstract description 11
- 239000000376 reactant Substances 0.000 claims abstract description 11
- 238000006555 catalytic reaction Methods 0.000 claims abstract description 10
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 9
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000000460 chlorine Substances 0.000 claims abstract description 8
- 229910052801 chlorine Inorganic materials 0.000 claims abstract description 8
- 239000012855 volatile organic compound Substances 0.000 claims abstract description 7
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 6
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- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims abstract description 3
- 229910001882 dioxygen Inorganic materials 0.000 claims abstract description 3
- -1 siloxanes Chemical class 0.000 claims description 23
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 22
- 239000003054 catalyst Substances 0.000 claims description 14
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 10
- 239000005864 Sulphur Substances 0.000 claims description 10
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 10
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 claims description 6
- 239000003463 adsorbent Substances 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000000377 silicon dioxide Substances 0.000 claims description 6
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 5
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- GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical compound [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 claims description 5
- 239000003513 alkali Substances 0.000 claims description 4
- 239000003518 caustics Substances 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 claims description 3
- 229910052804 chromium Inorganic materials 0.000 claims description 3
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- 238000004140 cleaning Methods 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims description 3
- 229910052703 rhodium Inorganic materials 0.000 claims description 3
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- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 claims description 3
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- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 claims description 2
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- 238000001035 drying Methods 0.000 claims 1
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 abstract description 30
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- 229910052739 hydrogen Inorganic materials 0.000 description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 5
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- 239000003345 natural gas Substances 0.000 description 5
- 239000004215 Carbon black (E152) Substances 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 150000001412 amines Chemical class 0.000 description 4
- 229930195733 hydrocarbon Natural products 0.000 description 4
- 150000002430 hydrocarbons Chemical class 0.000 description 4
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- 230000001590 oxidative effect Effects 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- AKEJUJNQAAGONA-UHFFFAOYSA-N sulfur trioxide Chemical compound O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 206010037660 Pyrexia Diseases 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910006283 Si—O—H Inorganic materials 0.000 description 1
- 239000003082 abrasive agent Substances 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
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- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
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- 230000005494 condensation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229940116318 copper carbonate Drugs 0.000 description 1
- GEZOTWYUIKXWOA-UHFFFAOYSA-L copper;carbonate Chemical compound [Cu+2].[O-]C([O-])=O GEZOTWYUIKXWOA-UHFFFAOYSA-L 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000006392 deoxygenation reaction Methods 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- JZZIHCLFHIXETF-UHFFFAOYSA-N dimethylsilicon Chemical compound C[Si]C JZZIHCLFHIXETF-UHFFFAOYSA-N 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
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- 239000012530 fluid Substances 0.000 description 1
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- 125000000524 functional group Chemical group 0.000 description 1
- 230000026030 halogenation Effects 0.000 description 1
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- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- YPJCVYYCWSFGRM-UHFFFAOYSA-H iron(3+);tricarbonate Chemical compound [Fe+3].[Fe+3].[O-]C([O-])=O.[O-]C([O-])=O.[O-]C([O-])=O YPJCVYYCWSFGRM-UHFFFAOYSA-H 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 229940093474 manganese carbonate Drugs 0.000 description 1
- 235000006748 manganese carbonate Nutrition 0.000 description 1
- 239000011656 manganese carbonate Substances 0.000 description 1
- 229910000016 manganese(II) carbonate Inorganic materials 0.000 description 1
- XMWCXZJXESXBBY-UHFFFAOYSA-L manganese(ii) carbonate Chemical compound [Mn+2].[O-]C([O-])=O XMWCXZJXESXBBY-UHFFFAOYSA-L 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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- 229910052682 stishovite Inorganic materials 0.000 description 1
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Classifications
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Abstract
本发明涉及通过以下步骤从气体进料如垃圾填埋气体、消化器气体或工业CO2废气中去除氧气:加热进料气体;任选地从经加热的进料气体中去除硅氧烷和硅烷醇;任选地去除经加热的进料气体中的部分含硫化合物;向经加热的进料气体中注入一种或多种用于氧转化的反应物;在至少一个合适的反应器中使气体中存在的任何或所有挥发性有机化合物(VOC)进行选择性催化转化,该挥发性有机化合物包括含硫化合物、含氯化合物和注入的任何反应物;清洁所得的贫氧气体。待注入的反应物包括H2、CO、氨、尿素、甲醇、乙醇和二甲醚(DME)中的一种或多种。
Description
本发明涉及一种经由反应物注入通过选择性催化氧化从工业气体进料中去除氧气的方法,其中含硫和含氯分子和其他挥发性有机碳化合物(VOC)的转化和通过与甲醇反应去除过量氧气都在同一反应器中进行。
更具体地,本发明涉及降低工业气体中氧气含量的替代途径,其中氧气含量的降低对于气体的增值是至关重要的。本发明的方法特别关注在热回路中而不是在其之前进行硅氧烷/硅烷醇去除和/或硫转化/去除。
本发明的方法聚焦于垃圾填埋气体(LFG)、消化器气体和工业CO2废气。如今,通过PSA(变压吸附)、膜或洗涤器技术实现氧气去除,这些技术具有非常高的资本支出(CAPEX)并且使得有价值组分大量损失,例如主气体中的甲烷损失成含氧废气中。本发明包括向主气流中加入组分,例如H2、CO、甲醇、氨或乙醇,并将所得气流引入至少一个催化反应器。在所述反应器中,氧气通过催化剂选择性地转化为CO2和水。
从燃料气流中去除氧气通常是天然气网(natural gas grid)中气体分布的要求,并且当使用该气体作为车辆运输燃料时也是这样要求。此外,去除氧气对于利用其他工业气流也是至关重要的,例如从含氧废气中生产商业级或工业级CO2。
US 3.361.531描述了通过在固体材料接触物质中的吸收而从含氧环境和气体混合物中去除氧气。更具体地,选自碳酸铜、碳酸锰和碳酸铁的化合物在低于约500℃的高温下与含氢气体接触,由此将碳酸盐还原成相应的氧化物化合物。使该氧化物化合物在大约环境温度下与所述含氧环境接触,由此吸收氧并氧化氧化物化合物。
US 2013/0209338A1公开了一种集成清洁系统,其用于清洁来自诸如发热和发电系统的垃圾填埋场和消化器的来源的沼气。硅氧烷、氯、氧和硫被去除至ppb水平,并且大部分水和一些VOC也被去除。该系统冷却沼气流以部分去除污染物,与小浓度氢气混合,然后燃烧剩余的氧气以加热沼气,留下足够的适合下游系列的污染物进一步转化和使用加氢脱硫床和吸附介质床分阶段去除的氢气。这对于低硫水平来说可能是合理的方法,但是当H2S水平超过200-300ppm时则不是。根据本发明的方法的不同之处在于,可使用甲醇或其他还原剂,并且将杂质保持在通过使用洗涤器可从流中去除的氧化形式。
在中小型项目中(通常至多10,000Nm3/h气体),当今工业中占主导地位的技术是PSA和基于膜的技术,而蒸馏和低温分离在大规模应用中占主导地位。
对于消化器气体和垃圾填埋气体净化工业中的应用,气体流量在500至10,000Nm3/h的范围内,并且基于PSA和膜的技术占主导地位。除了通常禁止的CAPEX之外,PSA和膜技术由于其复杂性和气体压缩以及有价值的烃(例如甲烷)从进料气流大量损失到含氧废气流而具有高的操作成本。
将垃圾填埋气转化为可再生天然气(RNG)的典型方法按以下步骤进行前端气体调节:
(1)通过吸收去除硅氧烷和硅烷醇,
(2)使用垃圾填埋气体中的部分氧气作为氧化剂,将含硫和含氯分子和其他挥发性有机碳化合物(VOC)转化为SO2、HCl、CO2和水,
(3)将甲醇注入气体中
(4)通过与甲醇反应去除过量的氧。
由于过量的热量形成,上述步骤(3)和(4)可以在分开的步骤中进行,其间设置有床间冷却。步骤(2)和(4)的催化剂的组成非常相似,如果不相同的话。到目前为止,因为关注在氧含量变得太低的情况下反应器内可能形成元素硫,通常的做法是使用具有用于这些步骤的单独反应器的设计。
然而,已经证明,硫的形成或其程度并不禁止在单个反应器中进行两个步骤(2)和(4),来代替使用两个单独的反应器。
因此,本发明涉及一种从工业气体进料中去除氧气的方法,所述方法包括以下步骤:
(a)加热进料气体;
(b)任选地从经加热的进料气体中去除硅氧烷和硅烷醇;
(c)任选地去除经加热的进料气体中的部分含硫化合物;
(d)向所述经加热的进料气体中注入一种或多种用于氧转化的反应物;
(e)在至少一个合适的反应器中使气体中存在的任何或所有挥发性有机化合物(VOC)进行选择性催化转化,该挥发性有机化合物包括含硫化合物、含氯化合物和步骤(d)中注入的任何反应物;
(f)清洁所得的贫氧气体。
通过在进入单一(即合并的)反应器之前向气体中添加甲醇,极大地促进了以下过程:含硫和含氯化合物和VOC(包括有意添加的甲醇)与垃圾填埋气体中的氧气被催化氧化成其燃烧产物(SO2、HCl、CO2和H2O)。
即使硫和氯的选择性氧化和选择性催化氧转化在同一反应器中进行,但是该反应器也可分成多个反应器,其间设置有适当的床间冷却,即热回收。这样可以清洁(clean up)氧气含量较高的气体,并与胺再沸器进行热量整合。
在根据本发明的方法中,在从气体中去除硅氧烷和硅烷醇之后,将一种或多种适于催化氧化的组分注入含氧主气流中。选择组分和催化剂,使得催化剂使用料流中的氧气氧化注入的组分,且基本上不氧化气流中的有价值组分,例如甲烷。
待注入的组分可包括例如以下一种或多种:H2、CO、氨、尿素、乙醇和二甲醚(DME)。
活性催化剂可包括负载在选自氧化铝、二氧化钛、二氧化硅和二氧化铈的载体上的金属或金属氧化物形式的选自以下的金属:钒、钨、铬、铜、锰、钼、铂、钯、铑和钌,及其组合。
工业气体中的硫杂质会在发电设备内部产生腐蚀性环境或甚至可能使存在的催化剂中毒。此外,存在于燃气发动机的进料气体中的硫化氢会引起润滑油的降解,导致需要频繁维护。此外,如果要将气体输送到气体管道或用作车辆燃料,则需要去除H2S。
清洁气体的另一个原因在于,其他杂质(例如硅氧烷)可能沉积在发热和发电设备中,并对内部部件造成严重损坏。
硅氧烷是包含硅、碳、氢和氧的有机硅化合物,其具有Si-O-Si键。硅氧烷可是线性的也可以是环状的。它们可存在于沼气中,因为它们用于各种美容产品,例如化妆品和洗发水(其被冲洗到下水道或以其他方式处理),使得它们最终进入城市废水和垃圾填埋场。硅氧烷在厌氧消化过程中不会分解,因此,从处理厂和垃圾填埋场捕获的废气通常会被这些化合物严重污染。已知硅氧烷可使用具有活性炭或多孔二氧化硅作为吸附剂的非再生填充床吸附去除。也可使用再生吸附剂以及基于气体冷却至极低温度的单元以将硅氧烷从气体中沉淀出来。此外,使用液体提取技术。此外,这些技术可以组合使用。
硅烷醇是硅化学中具有连接性Si-O-H的官能团。它涉及在所有醇中都出现的羟基官能团C-O-H。
因此,利用来自垃圾填埋场和厌氧消化器的原料气的主要问题是提供具有低硫含量(即小于几百ppm)和非常低含量的硅氧烷(通常为线性或环状二甲基硅Si-O-Si化合物)以及硅烷醇的气流。天然气的管道规格甚至更加严格。在这种情况下,必须将H2S去除至低于5ppm的残留浓度,并且还需要去除CO2和N2。含硫化合物的燃烧导致形成三氧化硫,其将与气体中的水分反应形成硫酸,硫酸可在冷点中冷凝并导致腐蚀。然而,特别地,硅氧烷会产生问题,因为它们在燃烧过程中转化为SiO2,导致发动机内部的磨料固体沉积物积聚并造成损坏,缩短使用时间,并增加许多部件(如压缩机、风扇、鼓风机、燃烧器喷嘴、锅炉中的热回收表面)和燃气发动机部件(如火花塞、阀门、活塞等)的维护要求。除了造成损坏和减少发动机的使用时间之外,为控制废气排放而安装的任何催化剂还对气流中夹带的SiO2敏感,实际上甚至比发动机本身更为敏感。例如,对于SCR(选择性催化还原)催化剂,SiO2耐受性可低至250ppb。
由于上述原因,非常希望从气流中去除硅氧烷、硅烷醇和含硫化合物。
优选地,要从中去除氧气的气体进料是垃圾填埋气体、消化器气体或工业CO2废气。
在本发明方法的一个优选实施方案中,处理气流,例如含有H2S和有机硫以及硅氧烷、CO2、H2O、甲烷、氯化化合物、氟利昂化合物和各种VOC(挥发性有机碳)化合物的垃圾填埋气体。
在步骤(d)中注入的组分包括H2、CO、氨、尿素、甲醇、乙醇和二甲醚(DME)中的一种或多种。
与具有较低氮和氧含量的气体相比,将低质量即具有高含量的氮和氧的垃圾填埋气体升级为管道气体质量更加困难且更加昂贵。使用反应物注入从低质量垃圾填埋气体中去除氧气将导致反应器中温度提升较高,这反过来将损坏催化剂。然而,如果将反应物在两个不同的点而不是一个点添加,则可使用两个串联的反应器,其间设置有冷却和反应物注入。该方法具有额外的益处,即在每个反应器之后回收的能量可用于CO2分离单元(胺洗涤)中的再沸器以使胺再生,并且它还可用作进料预热器。否则,用于再沸器和预热进料的能量将必须来自电力或来自垃圾填埋气体或天然气的燃烧。
来自氧化的热量可转移到油回路中,该油回路既用于在随后的CO2去除中的胺洗涤中运行再沸器,也用于预热进料。
参考该图进一步说明本发明,其中本发明与本申请人的用于消化器和垃圾填埋气体调节的GECCOTM技术结合。将进料气体加热至200-450℃并进料至硅氧烷和硅烷醇吸收床,该吸附床包括氧化铝、氧化铝和镍、二氧化硅或其组合。去除硅氧烷和硅烷醇后,将一种或多种适用于催化氧化的组分,即H2、CO、氨、尿素、甲醇、乙醇和DME等注入含有氧气的主气流中。然后将气体进料至催化反应器,以选择性氧化硫组分和选择性催化氧转化。所述催化反应器含有一种或多种催化剂,该催化剂可将硫化合物转化为SO2并且将VOC化合物(不是甲烷和轻质[即C3或更低]烃)转化为CO2和水以及卤化氢(如果某些VOC被卤化)。催化剂也会影响选择性氧化成H2O和CO2的过程,而有价值的烃,如甲烷和轻质[即C3或更低]烃基本上不被转化。催化剂优选包括负载在TiO2载体上的金属或金属氧化物形式的钨、钒、钼、铂或钯。
催化剂可选自负载在TiO2载体上的金属或金属氧化物形式的钨、钒、钼、铂或钯;或选自负载在选自氧化铝、二氧化钛、二氧化硅和二氧化铈的载体上的金属或金属氧化物形式的钒、钨、铬、铜、锰、钼、铂、钯、铑和钌,或其组合。
热反应器出口气体可通过使用进料-流出物热交换器用于加热反应器入口气体。
在氧气去除步骤中产生的额外热量将为进料-流出物热交换器提供更高的温差,这降低了CAPEX。
在热交换器的下游,使用苛性碱吸附剂在湿苛性碱或H2O2洗涤器或在干式洗涤器中去除SO2。在SO2去除后,通过使用基于胺的技术、基于溶剂的CO2去除技术、基于水的CO2去除技术或可替代的PSA和/或膜技术去除CO2。
可使用基于膜或PSA的技术完成氮去除。然后通过使用冷却和冷凝,随后使用分子筛或者TSA构造去除水。或者,氮去除单元位于除水单元的下游。
进一步优选催化剂是整体式的,以通过清洁工段降低用于垃圾填埋气体运输的电力消耗。
Claims (14)
1.一种用于从工业气体进料中去除氧气的方法,所述方法包括以下步骤:
(a)加热进料气体;
(b)任选地从经加热的进料气体中去除硅氧烷和硅烷醇;
(c)任选地去除经加热的进料气体中的部分含硫化合物;
(d)向所述经加热的进料气体中注入一种或多种用于氧转化的反应物;
(e)在至少一个合适的反应器中使气体中存在的任何或所有挥发性有机化合物(VOC)进行选择性催化转化,所述挥发性有机化合物包括含硫化合物、含氯化合物和步骤(d)中注入的任何反应物;
(f)清洁所得的贫氧气体。
2.根据权利要求1所述的方法,其中步骤(e)中的反应器被分成两个或更多个反应器,其间设有床间冷却。
3.根据权利要求1或2所述的方法,其中从中去除氧气的气体进料是垃圾填埋气体、消化器气体或工业CO2废气。
4.根据权利要求1-3中任一项所述的方法,其中步骤(f)中的清洁包括在分离单元中CO2的去除,N2的去除和经清洁的气体的干燥。
5.根据权利要求1-4中任一项所述的方法,其中所述气体具有高含量的氮气和氧气。
6.根据权利要求2所述的方法,其中在每个反应器之后回收的能量用于CO2分离单元中的再沸器。
7.根据权利要求1-3中任一项所述的方法,其中将进料气体加热至150-450℃的温度。
8.根据权利要求1-3中任一项所述的方法,其中将进料气体加热至150-450℃的温度,然后进料至硫、硅氧烷和硅烷醇去除单元。
9.根据权利要求8所述的方法,其中通过与来自氧气去除步骤的流出物气体进行热交换来加热进料至硫、硅氧烷和硅烷醇去除单元的进料气体。
10.根据前述权利要求中任一项所述的方法,其中待注入的组分包括H2、CO、氨、尿素、甲醇、乙醇和二甲醚(DME)中的一种或多种。
11.根据权利要求3所述的方法,其中所述垃圾填埋气体含有H2S和有机硫以及硅氧烷、硅烷醇、CO2、H2O、甲烷、氯化化合物、氟利昂化合物和各种VOC(挥发性有机碳)化合物。
12.根据前述权利要求中任一项所述的方法,其中所述催化剂包括负载在选自氧化铝、二氧化钛、二氧化硅和二氧化铈的载体上的金属或金属氧化物形式的选自以下的金属:钒、钨、铬、铜、锰、钼、铂、钯、铑和钌。
13.根据权利要求1所述的方法,其中通过选择性催化转化将硫组分转化为SO2,并在洗涤器中去除SO2。
14.根据权利要求13所述的方法,其中使用苛性碱吸附剂在湿苛性碱或H2O2洗涤器或在干式洗涤器中去除SO2。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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DKPA201700114 | 2017-02-16 | ||
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PCT/EP2018/053028 WO2018149710A1 (en) | 2017-02-16 | 2018-02-07 | A method for the removal of oxygen from an industrial gas feed |
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EP (1) | EP3582880A1 (zh) |
CN (1) | CN110225788A (zh) |
AU (1) | AU2018222356B2 (zh) |
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CN111167274A (zh) * | 2020-01-19 | 2020-05-19 | 中南大学 | 一种从冶炼烟气中脱除三氧化硫的方法及其脱除装置 |
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CN112370966B (zh) * | 2020-10-30 | 2022-04-22 | 南京大学 | 一种用于VOCs非均相反应的间歇式光反应器及其应用 |
CN115069277B (zh) * | 2022-06-16 | 2024-05-17 | 深圳市捷晶科技股份有限公司 | 一种用于VOCs中硅氧烷低温脱除的催化剂及其制备方法 |
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US20200147547A1 (en) | 2020-05-14 |
WO2018149710A1 (en) | 2018-08-23 |
CA3046602A1 (en) | 2018-08-23 |
AU2018222356A1 (en) | 2019-08-22 |
AU2018222356B2 (en) | 2023-09-28 |
US10933372B2 (en) | 2021-03-02 |
EP3582880A1 (en) | 2019-12-25 |
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