Part B Section 2_Quiz.pdf

The Syngas Production Quiz Answers 1. Which process is involved in fuel, food, and chemicals production and distribution? A. Steam reforming B. Partial oxidation C. Autothermal reforming D. Syngas production Answer: Syngas production (D) Processes based on H2 and syngas are one of the most basic pro...

The Syngas Production Quiz Answers 1. Which process is involved in fuel, food, and chemicals production and distribution? A. Steam reforming B. Partial oxidation C. Autothermal reforming D. Syngas production Answer: Syngas production (D) Processes based on H2 and syngas are one of the most basic processes involved in fuel, food, and chemicals production and distribution. 2. What is the combination of steam reforming and partial oxidation called? A. Equilibrium yields B. High and low temps C. Autothermal reforming D. Pre-reformer Answer: Autothermal reforming (C) A combination of steam reforming and partial oxidation is called autothermal reforming. 3. What is the purpose of using a pre-reformer in the process? A. To lower the steam/carbon ratio B. To favor the equilibrium yields C. To increase the temperature D. To protect downstream catalyst Answer: To protect downstream catalyst (D) A pre-reformer may be used when using higher HCs to protect downstream Ni SMR catalyst. 4. Which element causes corrosion in heat exchangers and poisons catalysts in the Cu-WGS process? A. Chlorides B. Oxygen C. Hydrogen D. Carbon Answer: Chlorides (A) Chlorides cause corrosion in heat exchangers and poison catalysts in the Cu-WGS process. 5. What is the purpose of scrubbing Cl- to below 5ppb with alkaline-treated Al2O3? A. To increase catalyst activity B. To remove impurities C. To enhance heat transfer D. To prevent corrosion Answer: To remove impurities (B) The purpose of scrubbing Cl- to below 5ppb with alkaline-treated Al2O3 is to remove impurities. 6. Is the combined reaction of CO and H2 formation from CnHm endothermic or exothermic? A. Cannot be determined B. Endothermic C. Depends on the process conditions D. Exothermic Answer: Endothermic (B) The combined reaction of CO and H2 formation from CnHm is endothermic. 7. Which two processes are considered to be one of the most basic processes involved in fuel, food, and chemicals production and distribution? A. Steam reforming and partial oxidation B. Syngas production and reactions C. NH3 synthesis and methanol production D. F-T synthesis and autothermal reforming Answer: Syngas production and reactions (B) Processes based on H2 and syngas are one of the most basic processes involved in fuel, food and chemicals production and distribution. 8. What are the primary and secondary reforming stages operated at high temperatures for in the NH3 synthesis process? A. To protect downstream catalysts B. To reduce the H2/CO ratio C. To produce syngas D. To favor equilibrium yields Answer: To favor equilibrium yields (D) For NH3 synthesis, primary and secondary reforming are operated at high temperatures to favor the equilibrium yields. 9. What is the purpose of using a pre-reformer in the steam reforming process? A. To protect downstream catalysts B. To increase the H2/CO ratio C. To favor the WGS reaction D. To lower the S/C ratio Answer: To protect downstream catalysts (A) A pre-reformer may be used when using higher HCs in the steam reforming process. This allows lower steam/carbon (S/C) ratio operation and protects downstream catalysts. 10. Which type of reaction is the combined steam/CO2 reforming for syngas with H2/CO = 2? A. Exothermic B. Depends on the process conditions C. Neutral D. Endothermic Answer: Endothermic (D) The combined steam/CO2 reforming for syngas with H2/CO = 2 is an endothermic reaction, meaning that heat must be supplied. 11. What is the compositional requirement for syngas in terms of stoichiometry? A. M = (H2-CO2)/(CO + CO2) = 2 B. M = (H2-CO2)/(CO + CO2) = 0.25 C. M = (H2-CO2)/(CO + CO2) = 0.5 D. M = (H2-CO2)/(CO + CO2) = 0.75 Answer: M = (H2-CO2)/(CO + CO2) = 2 (A) The compositional requirement for syngas in terms of stoichiometry is M = (H2-CO2)/(CO + CO2) = 2. 12. What is the purpose of adjusting the variables H2/CO and H2O/CH4 ratio in the production of syngas? A. To achieve the desired H2/CO ratio B. To maintain a constant temperature during the process C. To decrease the H2O content in syngas D. To increase the CO2 content in syngas Answer: To achieve the desired H2/CO ratio (A) The purpose of adjusting the variables H2/CO and H2O/CH4 ratio is to achieve the desired H2/CO ratio in the production of syngas. 13. Which process is considered to be one of the most basic processes involved in fuel, food, and chemicals production and distribution? A. Steam reforming B. Syngas production C. Autothermal reforming D. Partial oxidation Answer: Steam reforming (A) Steam reforming is considered to be one of the most basic processes involved in fuel, food, and chemicals production and distribution. 14. What is the purpose of using a pre-reformer in the steam reforming process? A. To protect downstream catalysts B. To lower the steam/carbon ratio C. To favor the equilibrium yields D. To operate at high temperatures Answer: To protect downstream catalysts (A) The purpose of using a pre-reformer in the steam reforming process is to protect downstream catalysts. 15. What are the primary and secondary reforming stages operated at high temperatures for in the NH3 synthesis process? A. To favor the equilibrium yields B. To lower the steam/carbon ratio C. To operate at high temperatures D. To protect downstream catalysts Answer: To favor the equilibrium yields (A) The primary and secondary reforming stages in the NH3 synthesis process are operated at high temperatures to favor the equilibrium yields. 16. What is the main purpose of scrubbing Cl- to below 5ppb with alkaline-treated Al2O3 in the Cu-WGS process? A. To increase the efficiency of the catalysts B. To decrease the temperature of the reaction C. To prevent corrosion in heat exchangers D. To remove impurities from the syngas Answer: To prevent corrosion in heat exchangers (C) Scrubbing Cl- to below 5ppb with alkaline-treated Al2O3 is done to prevent corrosion in heat exchangers caused by chlorides and to protect the catalysts from being poisoned. 17. What is the compositional requirement for syngas in terms of stoichiometry? A. M = (H2-CO2)/(CO + CO2) = 2 B. M = (H2-CO2)/(CO + CO2) = 3 C. M = (H2-CO2)/(CO + CO2) = 0 D. M = (H2-CO2)/(CO + CO2) = 1 Answer: M = (H2-CO2)/(CO + CO2) = 2 (A) The compositional requirement for syngas in terms of stoichiometry is M = (H2-CO2)/(CO + CO2) = 2. 18. What is the type of reaction involved in the combined steam/CO2 reforming for syngas with H2/CO = 2? A. Endothermic B. Neither endothermic nor exothermic C. Both endothermic and exothermic D. Exothermic Answer: Endothermic (A) The combined steam/CO2 reforming for syngas with H2/CO = 2 is an endothermic reaction.