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Recent content by SamCheung

  1. SamCheung

    CaSO4 to produce H2SO4

    I did not know that China has already plants in production, instead of using CaSO4, they used Phosphogysum. If you guys are interested, there was a paper presented by the Chinese at the Tuscon - Arizona Sulfur 98 by Zhao Z. and Feng J. in 1998. These plants were proven and economical in the...
  2. SamCheung

    CaSO4 to produce H2SO4

    Yes, I mean what I have written. Heat and carbon is required to convert CaSO4 into H2SO4 thru 3 steps using the Muller-Kuhne technology. Do you know any H2SO4 manufacturer using CaSO4 to produce H2SO4?
  3. SamCheung

    CaSO4 to produce H2SO4

    I understand that CaSO4 + C can produce H2SO4, Lime and other by products. Is there any company in the USA or Europe actually doing this? S is now very expensive now compared with a few years ago or even last year -> H2SO4 produced by direct combustion is now getting very expensive.
  4. SamCheung

    Rated MDMT

    Pls elaborate why -155F and what is so special about this -155F, thanks.
  5. SamCheung

    Rated MDMT

    According to ASME (-55F) and API (-150F), if you have calculated correctly, you are OK with -37F. For low pressure applications (say less than 100PSI) UCS66 curves scared a lot of people using carbon steel pressure tank fabrications and with the calculation of Rts, UCS-66(b)(1)(b) almost...
  6. SamCheung

    Rated MDMT

    How ASME determine -55F or why API determine -150F are beyond me. But, one thing for sure is, your Design MDMT is 30F, with MAT of -55F or -150F, ASME or API, you are save. Sorry that does not answer your question and so was TomBarsh did not answer my question!
  7. SamCheung

    Heat required to liberate CO2 with one kg-mole CaCO3

    This is the answer I am looking for. You solved my problem, thanks. For Cp, I can simply ignore the third term (right or wrong, its insignificant in real world).
  8. SamCheung

    Heat required to liberate CO2 with one kg-mole CaCO3

    Thanks. I will try to get my hands on these handbooks.
  9. SamCheung

    Heat required to liberate CO2 with one kg-mole CaCO3

    kenvlach, Thanks for the reply. Without going to the books you mentioned, I cannot comprehend the equations with lots of unknowns.
  10. SamCheung

    Heat required to liberate CO2 with one kg-mole CaCO3

    Unfortunately I know nothing about the Hesse Equations. I know that CO2 liberation absorbs heat but to quantify it will need a lot of time to explore these equations and associated equations in mult-dimensional analysis. Is there a simple way of finding the heat quantity absorbed by CaCO3 to...
  11. SamCheung

    Heat required to liberate CO2 with one kg-mole CaCO3

    SeanB, My apologies if my questions are too direct. Zoobie, Thanks for the response. Sam
  12. SamCheung

    Biomass Boiler

    The only pollutant information you have provided so far is SO2 which is .01% and this is your answer. There maybe some NOx formation, especially high temperature burning with excess air, fly dust. There maybe other pollutants in your fuel, furans and dioxins may be formed, you need to get a...
  13. SamCheung

    Heat required to liberate CO2 with one kg-mole CaCO3

    Another question is any latent heat involved with liberation of CO2 at 932F? Thanks.
  14. SamCheung

    Heat required to liberate CO2 with one kg-mole CaCO3

    Do you know Cp of CaCO3 at 932F? Do you know Cp at 68F? Is average/mean Cp_mean=(Cp_932+Cp_68)/2? Thanks for the response.
  15. SamCheung

    Advise on How to become a "good" Process Engineer

    Know your objective 1. get a proven P&ID 2. from the proven P&ID, design your own P&ID 3. assume all components of the P&ID will fail 4. know the weakness of each item 5. re-design P&ID 6. review & improve
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