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NSS Understanding and Interpreting the Chemistry Curriculum

NSS Understanding and Interpreting the Chemistry Curriculum. June 2006. Curriculum Structure. Compulsory part (198 hours) compiled with fundamental chemistry knowledge, principles, concepts and scientific process skills. Compulsory Part (Total 198 hours). Elective part (26 hours x 2)

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NSS Understanding and Interpreting the Chemistry Curriculum

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  1. NSS Understanding and Interpreting the Chemistry Curriculum June 2006

  2. Curriculum Structure • Compulsory part (198 hours) • compiled with fundamental chemistry knowledge, principles, concepts and scientific process skills

  3. Compulsory Part (Total 198 hours)

  4. Elective part (26 hours x 2) • Select any 2 out of 3 topics • In-depth treatment or extension of certain areas of the compulsory part

  5. Elective Part (Total 52 hours)

  6. Investigative study (20 hours) • Design and conduct a first-hand investigation

  7. Amendments on curriculum framework of NSS chemistry

  8. Why methanol production? • World demand : 33 million tonnes per year • One of the most important industrial chemicals • As solvent, fuel (blended with gasoline), an intermediate for chemicals including methyl tertiary butyl ether (MTBE), formaldehyde, acetic acid.

  9. Reforming: CH4 + H2O  CO + 3H2 CO + H2O  CO2 + H2 Feed purification Methanol manufacturing process Natural gas (96% methane) desulphurized natural gas & steam Removal of excess heat Compression water

  10. Methanol synthesis: CO + 2H2 CH3OH CO2 + 3H2 CH3OH + H2O Methanol manufacturing process Distillation columns for methanol purification compressed “reformed gas” 68% methanol 31% water 99% methanol

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