7 months after the above post, finally found out:

Water vapour is a greenhouse gas and contributes to global warming.

A quote from below-linked article tells us about the vicious cycle of increased water vapour causing higher temperatures causing even more evaporation (& drought @ the location of evaporation & flooding @ the location where this evaporated stuff precipitates) which in turn again increases the temperature and in turn even more droughts and evaporation happens and in turn the rains also increase in water content!

https://arstechnica.com/science/2022/09/how-global-warming-and-la-nina-fueled-a-summer-of-climate-extremes/

“In addition to raising temperature, global warming increases evaporation of surface waters into the atmosphere, drying areas that have had little rain. Warmer air increases the amount of water vapor the atmosphere can hold, and the thirstier atmosphere sucks moisture from the surface.
That extra moisture is carried away by winds and eventually flows into storms, often a thousand miles distant, that rain harder. Atmospheric moisture has increased by 5 percent to 20 percent in general compared with the pre-1970s. The increase in water vapor, a greenhouse gas, further amplifies warming. When water evaporates, it absorbs heat, and when it later falls as rain, that heat is released back into the atmosphere. This extra energy fuels storms, leading to more intense systems that may also be bigger and last longer, with up to 30 percent more rain as a consequence of warming.”

So long for those who advocate that only CO2, SOx, NOx and PM is air pollution and water vapour & heat pollution isn’t.

1] Promoting hydrogen combustion engine as a low-emissions alternative is one thing. But they’ve been showing it in racing instead of something for the transport sector, which is the most cost-conscious type of customer.

2] There is an anomalous example: diesel has higher calorific value but petrol has better power output and acceleration. Petrol has lower calorific value but it is more rev-happy.

3] A larger diesel engine retrofitted to a car which initially came with an underpowered petrol engine could totally change the driving experience.

4] Similarly putting lots of hydrogen through the engine could mean lots of power but at the expense of range? Who knows.

Bhai wah! Then in the end, what’s the use?? kia faida iska?? I thought the main reason they are doing this whole hydrogen fuel topi drama is because they are advertising hydrogen as a better more powerful fuel than hydrocarbons. That is why they have a whole racing team and a whole race car working on Hydrogen.

Perhaps they’re trying to hide that fact?

Hydrogen will decrease power. Above link https://afdc.energy.gov/fuels/hydrogen_production.html shared in this post https://carspiritpk.com/toyota-and-yamaha-developing-hydrogen-fueled-449hp-v8-engine/#comment-8948 tells us that, “hydrogen contains less energy per unit volume than all other fuels“. That is why they are getting this 450 hp after *special tuning*! Without tuning it may just be like converting from petrol to CNG.

It is an exothermic process, even if it causes no air pollution, it will still cause heat pollution. So it is not as harmless as it they make it sound.

What you are saying does make sense.

Hydrogen is produced or rather it is extracted from the air or water etc. by different methods and approaches. Hydrogen is always stuck to something here on earth and that is the main problem. You have to separate it first. That separation method is the real cost and the main thing to consider in a scenario such as the one you propose; its cost effectiveness.

Hydrogen extraction setups are always expensive. The hydrogen extraction done through electrolysis is good method to consider but the nations which do that are doing it through electricity produced by renewable methods e.g., solar or wind. doing it thorough our local oil produced electricity will be expensive.

Yes, your method might be workable if multiple big companies who can benefit from the continued supply of hydrogen (not only for power but for other purposes as well) come together and establish such a plant in an area and then they all share the services.
Even then, cost effectiveness will still be a major issue.

An other benefit from such an endeavor could be using hydrogen fuel cell buses for pubic transport. China is doing it an it does help improve air quality in cities. Lahore or Faisalabad can be very good candidates for such an undertaking. Both have industry and big enough public transport infrastructures.

You can read up more on the different methods available in the link below as well as new methods under development.

https://afdc.energy.gov/fuels/hydrogen_production.html

Re the infrastructure you have to consider one thing.
1) Hydrogen needs to be synthesized in a plant. It cannot be dug from a well like a hydrocarbon fuel. Hydrocarbon fuels occur naturally and while the can be synthesized in laboratory and factory, why would you manufacture it when it is available naturally?

2) Factories like British Oxygen Company or other companies who routinely manufacture gases for other industries have large plants filling oxygen cylinders and other gases. Hydrogen cylinders aren’t that uncommon because some of the hottest cutting and welding is done with hydrogen torch.

3) Coming to the main point after this preface, most factories in Pakistan have their own power generation. They are running on coal, LPG, furnace oil, diesel or renewable. The furnace oil is not available at retail but the distribution infrastructure is still present.

Some of these factories pay a lot to the EPA for their emissions (whether they pay the standard fees or under the table, in both cases money is going out of their pocket). Why don’t they install a hydrogen powered genset facility and then buy the adjacent plot and install a hydrogen manufacturing plant there to feed their generators? Zero emissions, in fact the hot exhaust from generators will be steam which can then be used in cogen, chiller or process. Factories could easily decommission their boiler room and layoff/repurpose all the staff working there. It looks like win-win-win-squared situation for big industry.

All the while they can save the costs of trucking their fuel (conventional fuels need to be trucked from the refinery) and save $$$ from the import bill in the process.

For vehicles the distribution infrastructure is necessary but for powergen you’d just need a hydrogen plant near your genset building. Conclusion is hydrogen engine does not seem a good cost-benefit or even technically viable otherwise big and medium industrial units would have all shifted on them.

The only time he is somewhat correct on this blog… Toyota is indeed finding an ALTERNATIVE to an environment friendly engine indeed 😄

Thanks I went and saw it, and heard it.
It sound just like any other combustion engine. Granted all of them sound slightly different but this one wasn’t unique enough to be an identification mark.

The way the driver was describing that it feels like “normal engine” remind of Aga Waqar’s car which ran on water and comments of Pervez Hoodbhoy and others on it. Agha Waqar’s water running car was a scam. It had one or two Mabzi water filters randomly in the car not connected to the mechanism in any way. It was just a a Cultus that’s it.