JPH0157739B2 - - Google Patents
Info
- Publication number
- JPH0157739B2 JPH0157739B2 JP18263181A JP18263181A JPH0157739B2 JP H0157739 B2 JPH0157739 B2 JP H0157739B2 JP 18263181 A JP18263181 A JP 18263181A JP 18263181 A JP18263181 A JP 18263181A JP H0157739 B2 JPH0157739 B2 JP H0157739B2
- Authority
- JP
- Japan
- Prior art keywords
- gas
- measured
- concentration
- nitrogen compounds
- converter
- 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.)
- Expired
Links
- 239000007789 gas Substances 0.000 claims description 61
- 229910017464 nitrogen compound Inorganic materials 0.000 claims description 27
- 150000002830 nitrogen compounds Chemical class 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 7
- CVTZKFWZDBJAHE-UHFFFAOYSA-N [N].N Chemical class [N].N CVTZKFWZDBJAHE-UHFFFAOYSA-N 0.000 claims 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 23
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical class N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 19
- 238000001514 detection method Methods 0.000 description 13
- 238000010586 diagram Methods 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 7
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 5
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 5
- 239000000428 dust Substances 0.000 description 4
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 239000003456 ion exchange resin Substances 0.000 description 3
- 229920003303 ion-exchange polymer Polymers 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 2
- 150000001412 amines Chemical class 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 229920000557 Nafion® Polymers 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 210000003323 beak Anatomy 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002828 nitro derivatives Chemical class 0.000 description 1
- -1 nitrogen oxides Chemical class 0.000 description 1
- 150000002832 nitroso derivatives Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 125000000542 sulfonic acid group Chemical group 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
Description
【発明の詳細な説明】
本発明は、大気や排ガス中に含まれる窒素化合
物の濃度測定方法に関し、もつと詳しくは、アン
モニアガスや有機アミンなどのアンモニア態窒素
化合物と、窒素酸化物が有機ニトロ化合物などの
非アンモニア態窒素化合物とを区別して測定する
ようにしたガス中に含まれる窒素化合物の濃度測
定方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for measuring the concentration of nitrogen compounds contained in the atmosphere or exhaust gas. The present invention relates to a method for measuring the concentration of nitrogen compounds contained in a gas, in which the concentration of nitrogen compounds contained in a gas is measured separately from non-ammonium nitrogen compounds such as compounds.
或る先行技術では、被測定ガスを吸収液中に曝
気して、アンモニア態窒素化合物を吸収液に吸収
させ、その吸収液をいわゆるネスラー紙薬を用い
て比色分析することによつて、ガス中に含まれる
アンモニア態窒素化合物を、前記非アンモニア態
窒素化合物と区別して測定するようにしている。
このような先行技術では、ガス中に含まれる全窒
素化合物の濃度を測定するための工程と、上述の
ようなアンモニア態窒素化合物の濃度を選択的に
測定するための工程とが、相互に独立して必要で
あつて、作業が面倒であるばかりでなく、処理工
程が多いので測定誤差が大きくなるおそがある。 In some prior art, the gas to be measured is aerated into an absorption liquid to absorb ammonia nitrogen compounds into the absorption liquid, and the absorption liquid is colorimetrically analyzed using a so-called Nessler paper drug. The ammonia nitrogen compounds contained therein are measured separately from the non-ammonia nitrogen compounds.
In such prior art, the process for measuring the concentration of all nitrogen compounds contained in the gas and the process for selectively measuring the concentration of ammonia nitrogen compounds as described above are mutually independent. This process is not only troublesome, but also involves a large number of processing steps, which may increase measurement errors.
本発明の目的は、上述の技術的課題を解決し
て、正確な濃度測定が可能であつてしかも連続的
な測定を可能にした新規なガス中に含まれる窒素
化合物の濃度測定方法を提供することである。 An object of the present invention is to provide a novel method for measuring the concentration of nitrogen compounds contained in a gas, which solves the above-mentioned technical problems and enables accurate and continuous measurement of the concentration. That's true.
以下、図面によつて本発明の実施例を説明す
る。第１図は本発明に従つて構成される測定装置
の一実施例を示す簡略化した系統図である。第１
図においては、被測定ガス中に含まれる全窒素化
合物の濃度を測定するときにおける動作状態が示
され、図中の破線は使用されていない管路が示さ
れる。窒素化合物としてのアンモニアガスおよび
有機アミンなどのアンモニア態窒素化合物、なら
びに窒素酸化物、有機ニトロ化合物および有機ニ
トロソ化合物などの非アンモニア態窒素化合物を
含む被測定ガスは、管路１を介して集塵器２内に
導かれる。これによつて被測定ガス中に含まれる
浮遊塵は、集塵器２によつて除塵される。 Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a simplified system diagram showing one embodiment of a measuring device constructed in accordance with the present invention. 1st
The figure shows the operating state when measuring the concentration of all nitrogen compounds contained in the gas to be measured, and the broken lines in the figure indicate unused pipes. The gas to be measured, which contains ammonia gas and ammonia nitrogen compounds such as organic amines as nitrogen compounds, and non-ammonia nitrogen compounds such as nitrogen oxides, organic nitro compounds, and organic nitroso compounds, is collected through pipe 1. Guided into vessel 2. As a result, floating dust contained in the gas to be measured is removed by the dust collector 2.
集塵器２によつて除塵された後の被測定ガス
は、管路３を介して貯留手段４に導かれる。貯留
手段４は、テトラフルオロエチレン樹脂（商品名
テフロン）などの防食性材料から成る細管であつ
て、コイル状に形成される。被測定ガスは、この
貯留手段４内を常に一圧の圧力で流過され、した
がつて貯留手段４内には常に一定量の被測定ガス
が貯留される。貯留手段４から導出される被測定
ガスは、三方弁５および管路６を介してコンバー
タ７内に導かれる。コンバータ７はたとえばステ
ンレス鋼などの防食性金属製管であつて、たとえ
ば600℃以上に加熱されている。そのためコンバ
ータ７内を流過される被測定ガス中に含まれる前
記窒素化合物は、空気酸化または還元されて一酸
化窒素ガスに変換される。 The gas to be measured after dust removal by the dust collector 2 is guided to the storage means 4 via the pipe line 3. The storage means 4 is a thin tube made of an anticorrosive material such as tetrafluoroethylene resin (trade name: Teflon), and is formed in a coil shape. The gas to be measured is always passed through the storage means 4 at a constant pressure, so that a certain amount of the gas to be measured is always stored in the storage means 4. The gas to be measured derived from the storage means 4 is guided into the converter 7 via the three-way valve 5 and the conduit 6. The converter 7 is a pipe made of corrosion-resistant metal such as stainless steel, and is heated to, for example, 600° C. or higher. Therefore, the nitrogen compounds contained in the gas to be measured flowing through the converter 7 are air oxidized or reduced and converted into nitrogen monoxide gas.
第２図を参照すると、本件発明者によるコンバ
ータ７の実施結果が示される。曲線ｌ１は、第１
式に示すように二酸化窒素ガスNO2が、コンバ
ータ７内において還元されて一酸化窒素ガスNO
に変換されるときの変換効率がコンバータ７内の
温度と対比されて示される。曲線ｌ１は、第２式
に示すようにアンモニアガスNH3が、コンバー
タ７内において空気酸化されて一酸化窒素ガス
NOに変換されるときの変換効率がコンバータ７
内の温度と対比されて示される。なお第２図に示
される実験結果は、コンバータ７内に流過される
ガス中に含まれる酸素の分圧が100Torrであると
きの測定結果である。 Referring to FIG. 2, the results of implementation of converter 7 by the present inventor are shown. The curve l1 is the first
As shown in the formula, nitrogen dioxide gas NO 2 is reduced in the converter 7 and becomes nitrogen monoxide gas NO.
The conversion efficiency is shown in comparison with the temperature inside the converter 7. Curve l1 shows that ammonia gas NH 3 is air oxidized in the converter 7 to become nitrogen monoxide gas, as shown in the second equation.
The conversion efficiency when converted to NO is converter 7
shown in comparison to the temperature inside. The experimental results shown in FIG. 2 were measured when the partial pressure of oxygen contained in the gas flowing into the converter 7 was 100 Torr.
NO2→NO＋１／２O2 …(1)
4NH3＋5O2→4NO＋6H2O …(2)
第２図から明らかなように、二酸化窒素ガス
NO2およびアンモニアガスNH3が一酸化窒素ガ
スNOに変換される効率は、コンバータ７内の温
度が600℃を超える値のときほぼ100％になること
がわかる。したがつて本件発明においては、コン
バータ７の温度は600℃以上に選ばれる。なお二
酸化窒素ガスNO2およびアンモニアガス以外の
窒素化合物が一酸化窒素ガスNOに変換される反
応は、第１式および第２式で示される反応よりも
低い温度で完全に行なわれ、したがつて第２図で
はその実験結果が省略されている。 NO 2 →NO+1/2O 2 …(1) 4NH 3 +5O 2 →4NO+6H 2 O …(2) As is clear from Figure 2, nitrogen dioxide gas
It can be seen that the efficiency with which NO 2 and ammonia gas NH 3 are converted into nitrogen monoxide gas NO is approximately 100% when the temperature inside the converter 7 exceeds 600°C. Therefore, in the present invention, the temperature of converter 7 is selected to be 600°C or higher. Note that the reaction in which nitrogen compounds other than nitrogen dioxide gas NO 2 and ammonia gas are converted into nitrogen monoxide gas NO is completely carried out at a lower temperature than the reactions shown in the first and second equations. The experimental results are omitted in FIG.
コンバータ７から導出されるガスには、前述の
空気酸化または還元によつて生成される水蒸気が
含まれる。この水蒸気は後続の除湿器８によつて
除湿される。除湿器８から導出されるガスは、調
圧用のキヤピラリ９および管路１０を介して検出
手段１１における発光セル１２内に導かれる。 The gas discharged from the converter 7 contains water vapor produced by the above-mentioned air oxidation or reduction. This water vapor is dehumidified by a subsequent dehumidifier 8. Gas discharged from the dehumidifier 8 is guided into the light emitting cell 12 in the detection means 11 via the pressure regulating capillary 9 and the conduit 10.
検出手段１１は、いわゆる化学発光式NOx計
と呼ばれるものであつて、第３式に示されるよう
に、一酸化窒素ガスNOが過剰のオゾンO3で酸化
されるときに、600nm〜3000nm付近の赤外光を
発することを原理として構成される。 The detection means 11 is a so-called chemiluminescent NO x meter, and as shown in the third equation, when nitrogen monoxide gas NO is oxidized with excess ozone O 3 , the detection means 11 is a so-called chemiluminescent NO x meter. It is constructed on the principle of emitting infrared light.
NO＋O3→NO2＋hν …(3)
すなわち発光セル１２内に導入された一酸化窒
素ガスは、発光セル１２内に図示しないオゾン発
生器から与えられたオゾンとともに第３式に示す
反応が行なわれる。この反応に伴なつて発せられ
た赤外光は、検出手段１１において発光セル１２
に関連して設けられた検出器１３によつて検知さ
れ、これによつて被測定ガス中に含まれる全窒素
化合物の濃度に対応した一酸化窒素ガスの濃度が
定量される。その定量結果は、検出手段１１に関
連して設けられる記録手段１４によつて出力され
る。 NO+O 3 →NO 2 +hν (3) That is, the nitric oxide gas introduced into the light-emitting cell 12 undergoes the reaction shown in the third equation together with ozone supplied from an ozone generator (not shown) into the light-emitting cell 12. . The infrared light emitted as a result of this reaction is transmitted to the light emitting cell 12 in the detection means 11.
The concentration of nitrogen monoxide gas corresponding to the concentration of all nitrogen compounds contained in the gas to be measured is determined thereby. The quantitative results are outputted by the recording means 14 provided in association with the detection means 11.
発光セル１２内において反応生成された二酸化
窒素ガスを含む排ガスは、スクラバ１５によつて
水洗洗浄され、これによつて二酸化窒素ガスが除
去されてポンプ１６を介して排気管１７から排気
される。 Exhaust gas containing nitrogen dioxide gas generated by reaction in the light emitting cell 12 is washed with water by a scrubber 15, thereby removing the nitrogen dioxide gas, and is exhausted from an exhaust pipe 17 via a pump 16.
管路３には、分岐管路１８を介して除去手段１
９が接続される。この除去手段１９内には、強酸
性のイオン交換基たとえばスルホン酸基を有する
イオン交換樹脂がたとえばコイル状に形成されて
充填されている。このようなイオン交換樹脂とし
ては、たとえばNafion（デユポン社製商品名）な
どがある。このようなイオン交換樹脂は、アンモ
ニアガスや有機アミンなどのアンモニア態窒素化
合物を選択的に吸着する機能を有する。したがつ
て管路３，１８を介して除去手段１９内に導入さ
れた被測定ガス中に含まれるアンモニア態窒素化
合物は、この除去手段１９によつて除去される。
除去手段１９から導出されるガスは、三方弁２
０、管路２１、調圧用のキヤピラリ２２およびポ
ンプ１６を介して、前述のスクラバ１９からの排
ガスとともに排気管１７から排気される。 The removal means 1 is connected to the pipe line 3 via a branch pipe line 18.
9 is connected. The removal means 19 is filled with an ion exchange resin having a strongly acidic ion exchange group, such as a sulfonic acid group, in the form of a coil, for example. Examples of such ion exchange resins include Nafion (trade name, manufactured by DuPont). Such an ion exchange resin has a function of selectively adsorbing ammonia nitrogen compounds such as ammonia gas and organic amines. Therefore, the ammonia nitrogen compound contained in the gas to be measured introduced into the removal means 19 through the pipes 3 and 18 is removed by this removal means 19.
The gas led out from the removal means 19 is passed through the three-way valve 2
0, the gas is exhausted from the exhaust pipe 17 together with the exhaust gas from the scrubber 19 through the pipe line 21, the pressure regulating capillary 22, and the pump 16.
以上のようにして第１図示の状態においては、
被測定ガス中に含まれる全窒素化合物の濃度が、
検出手段１１によつて測定される。なおこのと
き、三方弁５、管路６、コンバータ７、除湿器
８、キヤピラリ９、管路１０、検出手段１１およ
びスクラバ１５を介してポンプ１６に流過される
ガス量と、三方弁２０、管路２１、およびキヤピ
ラリ２２を介してポンプ１６に流過されるガス量
とは、各キヤピラリ９，２２によつて同一とされ
る。 As described above, in the state shown in the first diagram,
The concentration of all nitrogen compounds contained in the measured gas is
It is measured by the detection means 11. At this time, the amount of gas flowing into the pump 16 via the three-way valve 5, the pipe line 6, the converter 7, the dehumidifier 8, the capillary 9, the pipe line 10, the detection means 11 and the scrubber 15, the three-way valve 20, The amount of gas flowing into the pump 16 via the pipe line 21 and the capillary 22 is the same for each capillary 9, 22.
第３図は第１図示の測定装置の他の動作状態を
示す系統図であり、被測定ガス中に含まれる非ア
ンモニア態窒素化合物の濃度を測定するときにお
ける動作状態が示される。三方弁５，２０は予め
定められた時間ごとに連動して切換えられ、第１
図示の動作状態と、第３図示の動作状態とが交互
に切換えられる。この第３図示の状態では、第１
図に関連して説明した除去手段１９からのアンモ
ニア態窒素化合物を除去したあとの被測定ガス
が、三方弁２０および管路３０を介してコンバー
タ７内に導かれる。コンバータ７においては、前
述と同様に被測定ガス中に含まれる窒素化合物
は、空気酸化または還元されて一酸化窒素ガスに
変換される。コンバータ７から導出されるガス
は、前述と同様に除湿器８によつて除湿された
後、キヤピラリ９および管路１０を介して検出手
段１１における発光セル１２内に導かれる。これ
によつて被測定ガス中に含まれる非アンモニア態
窒素化合物の濃度に対応した一酸化窒素ガスの濃
度が検出手段１１において定量され、その定量結
果は記録手段１４によつて出力される。 FIG. 3 is a system diagram showing another operating state of the measuring device shown in FIG. 1, and shows the operating state when measuring the concentration of a non-ammonium nitrogen compound contained in a gas to be measured. The three-way valves 5 and 20 are switched in conjunction with each other at predetermined time intervals.
The illustrated operating state and the third illustrated operating state are alternately switched. In the state shown in the third diagram, the first
The gas to be measured from which the ammonia nitrogen compound has been removed from the removal means 19 described in connection with the figure is led into the converter 7 via the three-way valve 20 and the pipe line 30. In the converter 7, nitrogen compounds contained in the gas to be measured are air oxidized or reduced into nitrogen monoxide gas, as described above. The gas led out from the converter 7 is dehumidified by the dehumidifier 8 in the same manner as described above, and then guided into the light emitting cell 12 in the detection means 11 via the capillary 9 and the conduit 10. As a result, the concentration of nitrogen monoxide gas corresponding to the concentration of the non-ammonium nitrogen compound contained in the gas to be measured is determined by the detection means 11, and the result of the determination is outputted by the recording means 14.
このとき管路３を介して貯留手段４内に導入さ
れた被測定ガスは、三方弁５、管路３１、キヤピ
ラリ２２を介して、検出手段１１からの排ガスと
ともにポンプ１６を介して排気管１７から排気さ
れる。 At this time, the gas to be measured is introduced into the storage means 4 via the pipe line 3 via the three-way valve 5, the pipe line 31, the capillary 22, and the exhaust gas from the detection means 11 via the pump 16 into the exhaust pipe 17. is exhausted from.
以上のようにして第３図示の状態においては、
被測定ガス中に含まれる非アンモニア態窒素化合
物の濃度が検出手段１１によつて測定される。こ
のときもまた第１図示の状態と同様に、三方弁２
０、管路３０、コンバータ７、除湿器８、キヤピ
ラリ９、管路１０、検出手段１１およびスクラバ
１５を介してポンプ１６に流過されるガス量と、
三方弁５、管路３１およびキヤピラリ２２を介し
てポンプ１６に流過されるガス量とは、各キヤピ
ラリ９，２２によつて同一とされる。 As described above, in the state shown in the third diagram,
The detection means 11 measures the concentration of non-ammonia nitrogen compounds contained in the gas to be measured. At this time as well, the three-way valve 2
0, the amount of gas flowing into the pump 16 via the pipe line 30, the converter 7, the dehumidifier 8, the capillary 9, the pipe line 10, the detection means 11 and the scrubber 15;
The amount of gas flowing into the pump 16 via the three-way valve 5, the pipe line 31, and the capillary 22 is the same for each capillary 9, 22.
第４図は記録手段１４によつて出力される定量
結果を示す記録紙３５の正面図である。第４図示
の各ピークＡは測定装置が第１図示の状態である
とき、すなわち被測定ガス中に含まれる全窒素化
合物の濃度を測定したときにおける結果を示す。
ピークＡ間の断差部分Ｂは、測定装置が第２図示
の状態であるとき、すなわち被測定ガス中に含ま
れる非アンモニア態窒素化合物の濃度を測定した
ときにける結果を示す。前述のように測定装置に
おける第１図および第３図示の動作状態は、予め
定められた時間ごとに切換えられる。その予め定
められる時間ｔはたとえば１分間である。したが
つて記録紙３５上には、第４図から明らかなよう
にピークＡと、断差部分Ｂとが交互に記録される
ことになる。ビークＡの高さｈ１は、被測定ガス
中に含まれる全窒素化合物の濃度に対応し、断差
部分Ｂの高さｈ２は、被測定ガス中に含まれる非
アンモニア態窒素化合物の濃度に対応する。した
がつて被測定ガス中に含まれるアンモニア態窒素
化合物の濃度は、高さｈ１と高ｈ２の差として測
定されることになる。 FIG. 4 is a front view of the recording paper 35 showing the quantitative results output by the recording means 14. Each peak A shown in the fourth figure shows the result when the measuring device is in the state shown in the first figure, that is, when the concentration of all nitrogen compounds contained in the gas to be measured is measured.
The difference part B between the peaks A shows the result when the measuring device is in the state shown in the second diagram, that is, when the concentration of the non-ammonium nitrogen compound contained in the gas to be measured is measured. As described above, the operating states of the measuring device shown in FIGS. 1 and 3 are switched at predetermined intervals. The predetermined time t is, for example, one minute. Therefore, as is clear from FIG. 4, peaks A and difference portions B are alternately recorded on the recording paper 35. The height h1 of the beak A corresponds to the concentration of all nitrogen compounds contained in the gas to be measured, and the height h2 of the difference portion B corresponds to the concentration of non-ammonium nitrogen compounds contained in the gas to be measured. do. Therefore, the concentration of the ammonia nitrogen compound contained in the gas to be measured is measured as the difference between the height h1 and the height h2.
以上のように本発明によれば、被測定ガス中に
含まれる窒素化合物の濃度が、全窒素化合物の濃
度と、非アンモニア態窒素化合物の濃度とにそれ
ぞれ区別されて一つの処理系において連続的に測
定されるので、作業が簡単であるばかりでなく、
正確な濃度測定が可能となる。また被測定ガス中
に含まれるアンモニア態窒素化合物の濃度は、前
記全窒素化合物の濃度と非アンモニア態窒素化合
物の濃度との差として、併わせて容易にかつ正確
に測定することができる。 As described above, according to the present invention, the concentration of nitrogen compounds contained in the gas to be measured is continuously divided into the concentration of total nitrogen compounds and the concentration of non-ammonium nitrogen compounds in one processing system. It is not only easy to work, but also
Accurate concentration measurement becomes possible. Further, the concentration of ammonia nitrogen compounds contained in the gas to be measured can be easily and accurately measured as the difference between the concentration of the total nitrogen compounds and the concentration of non-ammonia nitrogen compounds.
第１図は本発明に従つて構成される測定装置の
一実施例を示す簡略化した系統図、第２図は本件
発明者による実験結果を示すグラフ、第３図は第
１図示の測定装置の動作状態を示す系統図、第４
図は記録手段１４によつて出力される定量結果を
示す記録紙３５の正面図である。
４…貯留手段、５，２０…三方弁、７…コンバ
ータ、９，２２…キヤピラリ、１１…検出手段、
１４…記録手段、１６…ポンプ、１９…除去手
段。
FIG. 1 is a simplified system diagram showing one embodiment of a measuring device constructed according to the present invention, FIG. 2 is a graph showing experimental results by the inventor, and FIG. 3 is a measuring device shown in FIG. 1. System diagram showing the operating status of
The figure is a front view of a recording paper 35 showing the quantitative results output by the recording means 14. 4... Storage means, 5, 20... Three-way valve, 7... Converter, 9, 22... Capillary, 11... Detection means,
14...Recording means, 16...Pump, 19...Removal means.
Claims (1)
と、前記全窒素化合物からアンモニア態窒素化合
物を選択的に吸着除去した後の残余の非アンモニ
ア態窒素化合物の濃度とを交互に定量し、前記全
窒素化合物の濃度と、前記非アンモニア態窒素化
合物の濃度との差から被測定ガス中に含まれるア
ンモニア態窒素化合物の濃度を測定するようにし
たことを特徴とするガス中の窒素化合物の濃度測
定方法。1. Alternately quantify the concentration of the total nitrogen compounds contained in the gas to be measured and the concentration of the non-ammonia nitrogen compounds remaining after selectively adsorbing and removing the ammonia nitrogen compounds from the total nitrogen compounds, and A concentration of nitrogen compounds in a gas, characterized in that the concentration of ammonia nitrogen compounds contained in the gas to be measured is measured from the difference between the concentration of total nitrogen compounds and the concentration of the non-ammonia nitrogen compounds. Measuring method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18263181A JPS5885155A (en) | 1981-11-14 | 1981-11-14 | Concentration measurement for nitrogen compound in gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18263181A JPS5885155A (en) | 1981-11-14 | 1981-11-14 | Concentration measurement for nitrogen compound in gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5885155A JPS5885155A (en) | 1983-05-21 |
| JPH0157739B2 true JPH0157739B2 (en) | 1989-12-07 |
Family
ID=16121661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18263181A Granted JPS5885155A (en) | 1981-11-14 | 1981-11-14 | Concentration measurement for nitrogen compound in gas |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5885155A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69816277T2 (en) * | 1997-02-28 | 2004-06-03 | Extraction Systems, Inc., Franklin | SYSTEM FOR THE DETECTION OF AMINES AND OTHER BASIC MOLECULAR SUB-CLEANING IN A GAS |
| US6096267A (en) | 1997-02-28 | 2000-08-01 | Extraction Systems, Inc. | System for detecting base contaminants in air |
| US6207460B1 (en) | 1999-01-14 | 2001-03-27 | Extraction Systems, Inc. | Detection of base contaminants in gas samples |
| US20130091827A1 (en) * | 2011-10-14 | 2013-04-18 | International Truck Intellectual Property Company, Llc | Monitor of ammonia in dosing system |
-
1981
- 1981-11-14 JP JP18263181A patent/JPS5885155A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5885155A (en) | 1983-05-21 |
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