INSTRUCTION: This section consists of FOUR (4) structured questions. Answer ALL questions.

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1 INSTRUCTION: This section consists of FOUR (4) structured questions. Answer ALL questions. ARAHAN: Bahagian ini mengandungi EMPAT (4) soalan berstruktur. Jawab SEMUA soalan. QUESTION 1 SOALAN 1 (a) i. Define petrochemical. [2 marks] Takrif petrokimia. Name the THREE (3) group types of petrochemical. Namakan TIGA (3) jenis kumpulan petrokimia. (b) There are two major categories include in distillation device which are tray and packing. Ada dua kategori utama dalam perkakasan penyulingan iaitu dulang dan padatan. i. State TWO (2) types of trays. Nyatakan DUA (2) jenis dulang. [2 marks] Explain TWO (2) characteristics of tray and packing. Jelaskan DUA (2) ciri-ciri dulang dan padatan. (c) Figure 1(c) shows the distillation column (fractionator) and the support equipment which is also important in distillation operation. Rajah 1(c) menunjukkan turus penyulingan (pemecahan) dan peralatan sokongan yang penting dalam proses penyulingan. i. Demonstrate TWO (2) examples of distillation application. Tunjukkan DUA (2) contoh aplikasi penyulingan. 2

2 Use Figure 1(c) to explain the distillation process in a distillation column. Gunakan Rajah 1(c) untuk menerangkan proses penyulingan dalam turus penyulingan. [10 marks] [10 markah] Figure 1(c): Distillation Column and Support Equipment Rajah 1(c): Turus Penyulingan dan Peralatan Sokongan QUESTION 2 SOALAN 2 (a) i. Define catalyst in catalytic cracking [2 marks] Takrifkan pemangkin dalam proses pemecahan bermangkin. i List THREE (3) parts of the catalytic cracking hardware in catalytic cracking Senaraikan TIGA (3) bahagian untuk komponen pemecahan bermangkin dalam proses pemecahan bermangkin. 3

3 (b) Catalytic reforming process is a process in refining in which naphthas are changed chemically to increase their octane number. Proses pembentukan semula mangkin adalah satu proses dalam penapisan di mana nafta diubah secara kimia untuk meningkatkan bilangan octana. i. Explain the importance of increasing the octane number in catalytic reforming Terangkan kepentingan dalam peningkatan bilangan oktana dalam proses pembentukan semula mangkin. Identify THREE (3) reactions that take place in the catalytic reforming Kenalpasti TIGA (3) tindak balas yang berlaku dalam proses pembentukan semula mangkin. (c) i. Identify the equipment used in the catalytic reforming Kenalpasti peralatan yang digunakan dalam proses pembentukan semula mangkin. Coke ends up as deposit and covered the surface of the catalyst until it can become inactive. Generalize the process of catalyst regeneration in catalytic reforming Kok berakhir sebagai deposit dan menutupi permukaan pemangkin sehingga ia menjadi tidak aktif. Terangkan proses penjanaan semula pemangkin dalam proses pembentukan semula mangkin. [11 marks] [11 markah] 4

4 QUESTION 3 SOALAN 3 (a) State FIVE (5) factors to be considered in designing a gas processing plant. Nyatakan LIMA (5) faktor yang perlu diambilkira dalam merekabentuk loji pemprosesan gas. [5 marks] [5 markah] (b) Based on Figure 3(a), Berpandukan Rajah 3(a), i. Explain TWO (2) sources of gas used in Gas Processing Plant in Kerteh. Terangkan DUA (2) sumber gas yang digunakan di Loji Pemprosesan Gas di Kerteh. Explain the function of Unit 4 Terangkan fungsi Unit 4. [2 marks] Figure 3(a): Gas Processing Plant Rajah 3(a): Loji Pemprosesan Gas 5

5 (c) Generalize the process occurs after butane is produced from the bottom of the depropanizer in the Product Recovery Unit (PRU). Terangkan proses yang berlaku selepas butana dihasilkan daripada bahagian bawah depropanizer di Product Recovery Unit (PRU). [14 marks] [14 markah] QUESTION 4 SOALAN 4 (a) Ammonia is produced at high temperature and pressure with the presence of catalyst. Ammonia dihasilkan pada suhu dan tekanan yang tinggi dengan kehadiran pemangkin. i. Write the chemical formula of ammonia. [1 mark] Tuliskan formula kimia ammonia. [1 markah] List FOUR (4) applications of ammonia in industry. Senaraikan EMPAT (4) aplikasi ammonia dalam industri. (b) Describe the processes that occur in the following equipment. If there is any chemical reaction involved, please write the chemical reactions: Terangkan proses-proses yang berlaku dalam alatan berikut. Jika melibatkan tindakbalas kimia, tuliskan tindakbalas kimia tersebut: i. Desulfurization Reactor in Desulfurization Unit. Reaktor Penyahsulfuran di Unit Penyahsulfuran. Methanator in Methanation Unit. Metanator di Unit Methanation. (c) Draw the block flow of ammonia plant and completed with label. Lukis aliran blok loji ammonia dan labelkan dengan lengkap. SOALAN TAMAT [14 marks] [14 markah] 6

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