Could Hydrogen Sulfide Improve the Kraft Process?

  • Thread starter Thread starter christian everett
  • Start date Start date
  • Tags Tags
    Process
AI Thread Summary
The discussion centers on the potential use of pure hydrogen sulfide in the Kraft process for lignin depolymerization, suggesting it may be more efficient than traditional methods involving sodium sulfide. The production of hydrogen sulfide through the direct reaction of hydrogen with molten sulfur at approximately 450 °C is proposed as a lower-energy alternative. This method could reduce material requirements and shipping costs, as hydrogen sulfide has a significantly lower molecular weight compared to sodium sulfate and carbon. The conversation highlights the benefits of using hydrogen sulfide in terms of energy efficiency and cost-effectiveness in the pulping process.
christian everett
Messages
16
Reaction score
2
I am guessing that just pure hydrogen sulfide, gaseous or liquified under pressure without the sodium, would effect the depolymerization of lignin which is the goal of the Kraft process.

Hydrogen sulfide can be produced by treating hydrogen directly with molten elemental sulfur at about 450 °C, which I am guessing would be a lower temperature for less time, saving energy than the production of sodium sulfide from sodium sulfate and carbon.

Also there would be less materials, saving shipping costs (since one mole of hydrogen sulfide weighs 34 grams and one mole of sodium sulfate weighs 142 grams plus two moles of carbon weighing 24 grams totaling 166 grams.
 

Attachments

  • Depolymerization of Lignin.jpg
    Depolymerization of Lignin.jpg
    24.8 KB · Views: 434
Chemistry news on Phys.org
christian everett said:
I am guessing

Please read the forum rules.

Topic locked.
 

Thread 'Solubility of MgSO47H2O in water'

It seems like a simple enough question: what is the solubility of epsom salt in water at 20°C? A graph or table showing how it varies with temperature would be a bonus. But upon searching the internet I have been unable to determine this with confidence. Wikipedia gives the value of 113g/100ml. But other sources disagree and I can't find a definitive source for the information. I even asked chatgpt but it couldn't be sure either. I thought, naively, that this would be easy to look up without...
View full post »

Thread 'Why does having 8 valence electrons make an element inert?'

I was introduced to the Octet Rule recently and make me wonder, why does 8 valence electrons or a full p orbital always make an element inert? What is so special with a full p orbital? Like take Calcium for an example, its outer orbital is filled but its only the s orbital thats filled so its still reactive not so much as the Alkaline metals but still pretty reactive. Can someone explain it to me? Thanks!!
View full post »

Similar threads

Reaction between Aluminum Sulfide and Bleach?
Replies
6
Views
15K
Could fusion be generated with very high voltage?
Replies
3
Views
6K

Hot Threads

Recent Insights

Back
Top