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Blending of alkanolamines effect towards acid gas removal in a post-combustion carbon capture technology

Blending of alkanolamines effect towards acid gas removal in a post-combustion carbon capture technology / Nurul Haznie Khussna Jantan
Pembakaran arang batu telah mengeluarkan gas rumah hijau seperti CO2 dan H2S ke atmosfera. Oleh itu, isu utama ialah proses pembersihan kerana gasifikasi menghasilkan pelbagai bahan pencemar seperti zarah dan gas asid sebelum dibebaskan ke atmosfera. Pelepasan CO2 dapat dikurangkan untuk penjanaan kuasa oleh tiga teknologi penangkapan yang merupakan pembakaran pasca pembakaran, pra-pembakaran dan pembakaran oxyfuel. Dalam kajian ini, tangkapan CO2 pasca pembakaran melibatkan terutamanya pemisahan CO2 daripada campuran CO2 / N2 yang digunakan. Teknologi penangkapan penyerapan digunakan untuk menangkap CO2 dari loji kuasa dengan menggunakan alkanolamin campuran iaitu MEA dan MDEA. Kajian utama adalah untuk mengenal pasti nisbah terbaik campuran alkanolamines dan lain-lain keadaan optimum yang boleh meningkatkan kecekapan penyingkiran gas asid dan pemulihan amina. Data gas serombong TNBR digunakan sebagai kajian kes dan simulasi proses dengan menggunakan Aspen plus dapat mengoptimumkan proses ini. Simulasi yang keadaan mantap digunakan dan keadaan operasi yang optimum untuk penyerap dan pebuangan dikaji. Kondisi operasi untuk penyerap adalah 30⁰C (1 atm), manakala penekan pada 117⁰C (2 atm). Pengadunan terbaik nisbah alkanolamin pada 3: 7 dengan 40% berat amina dalam pelarut. Dengan membandingkan parameter yang dioptimumkan kepada keputusan TNBR, kecekapan pembuangan gas asid meningkat kepada 91.55% dengan kenaikan 5.81%. Duti panas terbaik dalam kes ini ialah 1000 watt yang diberi penalti tenaga yang rendah dan kos yang dikurangkan. _______________________________________________________________________________________________________ The combustion of coal has released greenhouse gases such as CO2 and H2S into the atmosphere. Therefore, one of the main issues is the clean-up process because gasification produces various pollutants such as particulates and acid gases before its release into the atmosphere. The CO2 emissions can be reduced for power generation by three capture technologies which are post-combustion, pre-combustion and oxyfuel combustion. In this study, the post-combustion CO2 capture involves mainly the separation of CO2 from a CO2/N2 mixture is applied. The absorption capture technology is to apprehend CO2 from power plant by using the blended alkanolamines which are MEA and MDEA. The primary study in this research is to identify the best ratio of blending alkanolamines and other optimum conditions that can affect the acid gas removal efficiency and amine recovery. The TNBR flue gas data are used as a case study and process simulation Aspen plus is utilized to optimize the process. In steady state simulation, the optimal operating conditions of absorber and stripper are found. The operating condition for absorber is 30⁰C (1 atm), while stripper at 117⁰C (2 atm). The best blending of alkanolamines ratio is at 3:7 with 40 wt % of amine in the solvent. By comparing the optimized parameters to TNBR’s result, the efficiency of acid gas removal has an increment of 5.81% which is at 91.55% of efficiency. The best heat duty in this case is 10000 watts, which gives low energy penalty and reduced operating cost.
Contributor(s):
Nurul Haznie Khussna Jantan - Author
Primary Item Type:
Final Year Project
Identifiers:
Accession Number : 875007558
Language:
English
Subject Keywords:
combustion; coal; greenhouse gases
First presented to the public:
6/1/2018
Original Publication Date:
7/18/2018
Previously Published By:
Universiti Sains Malaysia
Place Of Publication:
School of Chemical Engineering
Citation:
Extents:
Number of Pages - 74
License Grantor / Date Granted:
  / ( View License )
Date Deposited
2018-07-18 10:53:37.424
Date Last Updated
2020-04-26 11:22:22.342
Submitter:
Mohd Jasnizam Mohd Salleh

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