Question: Utilization methods and examples for the hydrogen produced as a by-product of propane dehydrogenation to produce propylene
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As the title suggests, I am working on similar reports recently, and I would like to ask everyone: are there any suitable ways to utilize the hydrogen gas produced as a by-product of the propane dehydrogenation process to produce propylene? Do existing propane dehydrogenation units integrate with other production units, such as ammonia synthesis, catalytic hydrogenation, desulfurization, etc., through the hydrogen gas produced as a by-product? It’s a shame to think that this hydrogen gas gets burned. I hope everyone will not hesitate to share their insights; I thank you very much.
The hydrogen in our company was burned up, which I find really unfortunate. I think a PSA system could be installed; after the hydrogen is purified, all the equipment will be able to use it
After PSA, hydrogen peroxide can be used
In fact, to be used as a hydrogen product, purification methods such as PSA are definitely necessary. However, the transportation cost of hydrogen is relatively high; therefore, it would be excellent if there were a way to use it directly as a raw material for other devices through integrated systems. It’s just not clear what existing devices are being utilized for this purpose.
Yes, in that regard, I think the linkage with propylene oxide is good. Using the direct oxidation method.
Hehe, new business opportunities – let’s see how big they are
This post was last edited by Huang Yi on 2016-5-30 at 10:52. Hydrogen peroxide is mainly used in green synthesis processes, such as for CPL and PO; it can also be sold directly, with a distribution range of around 300 kilometers. There are also electronic-grade and food-grade hydrogen peroxides available. Recently, the price of hydrogen peroxide has been good; it’s considered a high-quality product in the market, although it is still a commodity in small quantities. For the HPPO method used in PO, the main technologies currently in use for driving this process are Geely Shenhua (Evonik-Wood technology) and Sinopec Changling (technology developed by the China Petroleum Research Institute). In China, PO is mainly used in polyether polyols, which in turn serve as the primary raw material for polyurethanes. Starting from the second half of 2014, PO became quite popular; however, the current market situation does not seem favorable. But everything is cyclical, and decisions regarding cost competitiveness need to be made by taking into account the specific resources available to each factory. Of course, finding a source for the technology is just as important as making market forecasts.
Another approach is the most straightforward one: selling hydrogen. It involves the comprehensive utilization of resources, with hydrogen pipelines being used to transport excess hydrogen to nearby factories that need it, such as refineries and the like.
It is generally used as fuel; for other purposes, it needs to be purified first. It’s not necessarily reasonable.
Hydrogen is required for all hydrogenation units, including PX
Could anyone who is familiar with this topic share some insights on the economic viability of propane dehydrogenation?