Friday, September 13, 2024
Intermediate Hydrogen Economy
1A. Transport and electricity generation use Internal Combustion (IC) engines for power. These IC engines typically burn Fossil Fuels (FF), and emit Greenhouse Gases (GG), which trap heat in our atmosphere, worsening our climate crisis.
1B. To elaborate: Trucks and automobiles burn diesel and gasoline; Stationary power plants and little portable electricity generators burn gaseous fuel, gasoline and diesel fuel; airplanes burn kerosene; and large ships burn bunker fuel (a thick, economical fossil fuel). Burning these fuels produces the GGs carbon dioxide, oxides of nitrogen and others, worsening our climate crisis. For perspective: GG% by source: Transport:17%; Electricity/Heat Generation: 32%.(1)
1C. But IC engines burning methane (within gaseous fuels) deplete one GG, while releasing another, far less potent GG; carbon dioxide. Also, IC engines may emit aerosols which can reduce atmospheric heating.
1D. Electric vehicles (EVs) are replacing some IC-powered vehicles, but mineral resources constrain future EV production.(2) Thus EVs can not replace all FF vehicles, given existing and even feasible future mining technologies, and Earth’s finite resources. Furthermore, mineral ore mining rate constraints curtail EV adoptation in the next decade.
1F. Fueling existing IC engines with Sustainably-Generated Hydrogen (SGH) might allow completion of, and speed, the green transition.
2. Vehicular Combustion of SGH.
2A. A recent revelation in freight truck onboard hydrogen fuel storage, bodes well for other SGH IC engine conversion.(3) Scientists, considering the hydrgenation and dehydrogenation of oils; a hydrogen storage method, realized that IC engine exhaust could supply needed heat for on-truck dehydrogenation reactions to supply hydrogen fuel.
2B. This combination (of 1. internal combustion engine exhaust heat and 2. dehydrogenation of hydrognated oils), can help sustainably fuel other vehicular and stationary IC engines, in these ways:
2B1. Diesel engines can run partially on gaseous fuels, like SGH, with 15% diesel for ignition, when gaseous fuel carburators supply mixed air and fuel into a normal diesel engine intake manifold.
2B2. Spark-ignited IC engines can run on SGH, when gaseous fuel carburators replace liquid fuel carburators, or when existing carburators are adapted to burn gaseous fuels like SGH. Both of these have been done.
3. Stationary Combustion of SGH.
3A. Perhaps SGH can take over the existing gaseous fossil fuel ‘Natural Gas’ pipeline network, replacing fossil fuel with SGH within the pipe network, accompanied by conversion of all appliances to burn SGH.
3B. Alternately, or beforehand, if SGH is added in moderate percentages to existing gaseous ‘Natural Gas’ fuel supplies, partial sustainablity could be achieved with little conversion needed.
3C. Stationary electricity generation plants can run on on SGH: Diesel plants can run predominently on SGH, while turbines fueled by gaseous fossil fuel can burn SGH.
4. Alternate Diesel Ignition Fuel Possibility.
4A. Alternately, diesel IC engines predominently burning SGH might ignite that SGH by injecting a fraction of the hydrogenated oil, instead of injecting diesel fuel.
5. SGH use in IC engines – Pro and Con:
5A. Pro: Uses much existing IC infrastructure, thus speeding green transition and reducing its cost. Burning SGH within an IC engine emits mostly water, and no carbon dioxide.
5B. Con: IC engines are still constrainted by the Carnot limit,(4) even when SGH-fueled; unlike fuel-cell-powered EVs. Hence fuel cell power will probably replace IC engines over time. Also, dehydrogenation units small enough to supply hydrogen to automobiles might be difficult to design or construct.
7. Increasing SGH Supply.
7A. William Heronemus proposed an offshore array of floating wind-powered electricity generators, the output of which hydrolyzed water at the extreme pressures of the deep ocean, yielding pressurized hydrogen and oxygen. These would supply our industries by being piped to shore through economical thin tubing, made feasible by the deep ocean pressure.(5)
7B. Excess solar or wind electrical power can split water into hydrogen and oxygen, when renewable energy supply exceeds demand.
7C. Ashore, generated hydrogen could be stored via oil hydrogenation. In the deep ocean, hydrogen might be stored within economical thin film bags made feasible by the pressure of the deep ocean. Other hydrogen storage methods include 1. Compression at sea level, and 2. Adsorption onto metal or activated carbon particles, 3. Liquification via compression and cooling.
8. Summary
8A. SGH might rapidly begin to power transport and electricity generation through:
8A1. Quickly building massive arrays of floating wind turbine generators, powering at-sea water electrolyzers, linked to pipe electrolyzed SGH to shore.
8A2. On-vehicle dehydrogenation of oil hydrogenated with SGH, releasing hydrogen.
8A3. Incorporation of SGH into 'Natural Gas' networks.
End.
Footnotes:
1. https://www.climatewatchdata.org/ghg-emissions?breakBy=sector&chartType=percentage&end_year=2016§ors=agriculture%2Cindustrial-processes%2Cland-use-change-and-forestry%2Cwaste%2Cbuilding%2Cfugitive-emissions%2Cmanufacturing-construction%2Cother-fuel-combustion%2Ctransportation&source=Climate%20Watch&start_year=1990
2. https://tupa.gtk.fi/raportti/arkisto/42_2021.pdf
3. https://pubs.acs.org/doi/10.1021/acs.energyfuels.3c01919
4. https://en.wikipedia.org/wiki/Carnot%27s_theorem_(thermodynamics
5. http://theheronemusproject.com/THP/library/WEH.2001%20Presentation.pdf
http://theheronemusproject.com/THP/library/Patent7075189.pdf
Thursday, August 01, 2024
Friday, July 19, 2024
Monday, May 03, 2021
Cook while making biochar with merely a shovel? - Dakota fire hole modified to make biochar cleanly - progress so far.
Here I attempt to extend one to resemble a TLUD biochar stove. TLUD stands for Top Lit Up Draft, and is an arrangement of chambers and air flows that forms charcoal while cleanly burning the smoke produced. For more on these one can see: https://en.wikipedia.org/wiki/Top-lit_updraft_gasifier
I dug a Dakota fire hole, then dug below one of the holes to form a char-making chamber.
It differed from this drawing in that there was no primary air supply. I guess it is actually not a TLUD, but a 'TLND' (Top Lit No Draft). Then I loaded the chamber with dry wood, spread kindling and tinder above, but still way below ground level. Then I lit a fire atop the fuel. It burnt pretty cleanly, but released a little smoke. I'd like to improve this and will try to figure out how. Below are some photos of the resulting char in the hole. To enlarge a photo fragment below, to see the entire image, click on each fragment.
Friday, December 18, 2020
Downhill for All Involved
Downhill for All Involved
Global underwriters and insurers now risk vast losses from the climate crisis.(1)
“Recent research from Cambridge University…warns that if climate change is left unchecked, catastrophic losses on property investments from disasters like wildfires, hurricanes, and flooding will triple over the next 30 years… the resulting losses to the insurance industry could cause a global financial crisis.”(2 Forbes 2019-5-22)
Can we protect our global economy by fixing our damaged climate? Who has means and motive? Are there lessons within history?
HISTORY: In the 1750s, Benjamin Franklin and others founded a house fire insurer in Philadelphia, which raised rates on more hazardous homes, and refused to insure the riskiest.(3) In 1777, Anthony Hill swept Philadelphia chimneys for this ‘Philadelphia Contributorship’.(4) This chimney sweeping exemplifies a significant step, by fledgling American insurers, beyond merely avoiding or pooling risk, to risk reduction.
In 1893, William H. Merrill midwifed the safety-troubled electrical industry into the behemoth we know today, after the young engineer started working for insurance underwriters. They hired him to inspect electrical set-ups at the Chicago World’s Fair grounds for the Fair’s opening. Merrill, just graduated from Massachusetts Institute of Technology (MIT), proposed Underwriters Laboratories (UL) to test and certify fire safety for the insurance underwriting industry. Rejected at first, he later succeeded in convincing underwriters to start this.(5)
So ended an era of deadly, catastrophic fires that scarred USA’s young cities. For example, The Great Chicago Fire of 1871 killed about 275 people and caused $222 million dollars of damage, equivalent to $4.6 billion 2018 dollars.(6) It accompanied three other fires that week, in Peshtigo, MI, Port Huron, MI, and Urbana, IL which killed more than 2,200.(7) Today we again suffer the devastating effects of fire - not from burning houses, but from burning fossil fuels. The resulting carbon dioxide ruins the climate that our food system depends on, and for which our buildings were designed.
WHAT CAN BE DONE? The Stern Review of 2006 (8) estimates annual climate crisis containment costs to be 2% of World Gross Domestic Product (WGDP),(9) with damages thus avoided at 5% of WGDP. In 2019, WGDP totaled about $87 trillion,(10) hence annual climate crisis containment costs would near $1.74 trillion a year.
The Drawdown Review of 2020 forecasts the cost and benefits of climate preservation in two scenarios.(11) The first scenario forecasts $22.5 trillion in initial investments stopping 994 gigatons of CO2 or equivalent greenhouse gas emissions, with lifetime costs running to -$95.1 trillion and lifetime profits of $15.6 trillion. Note: Lifetime costs are negative – beyond just the direct profit to investors, more than four times the investment value would be returned to society. These reviews describe how it could be cheaper to fix rather than suffer a ruined climate; indeed, so much cheaper that, in the Drawdown analysis, it’s actually profitable.
APPROACH: Many have struggled to contain Earth’s climate crisis. But who has both the motive of understanding this climate crisis, and the means to contain it? We at risk are numerous; many have the motive which understanding provides. However most of us lack the means to preserve our climate; within the few with the means, there are fewer still understanding this climate risk and their ability to contain it.
With about $27 trillion dollars in assets,(12) do the world’s underwriters and insurers have the means to control the climate crisis? If four decades of climate crisis containment were invested in at once, at a cost of $69.6 trillion, according to the Stern Review, underwriters and insurers would need to borrow $42.6 trillion, but stand to gain from the $174 trillion in climate damage costs avoided over those forty years. And the insurance industry now has enough for the Drawdown’s first scenario’s investments.
How might this occur? A global underwriter consortium might set standards that would identify carbon-neutral or -negative provision of goods or services. Policies might then specify that to receive insurance, underwriter’s insurers and customers must only use carbon-neutral or -negative goods and services that meet that standard; while also specifying direct investment into climate protection, and out of climate destruction, by underwriters, insurers and customers. This first part mimics Underwriters Laboratories’ success, the second could adhere to Stern and Drawdown Reviews’ prescriptions.
Much can be done affordably; it costs more to suffer climate crisis than to avoid it; and the insurance industry has both means and motive to protect our climate. A corollary of ‘Don’t put all your eggs in one basket’ might be: ‘With all your eggs in one basket, protect that basket.’
1 https://www.forbes.com/sites/energyinnovation/2019/05/22/the-global-insurance-industrys-6-billion-existential-threat-coal-power, https://www.theguardian.com/environment/2019/mar/21/climate-change-could-make-insurance-too-expensive-for-ordinary-people-report
2 https://www.forbes.com/sites/energyinnovation/2019/05/22/the-global-insurance-industrys-6-billion-existential-threat-coal-power/ citing https://www.cisl.cam.ac.uk/business-action/sustainable-finance/climatewise/news/investors-and-lenders-need-better-tools-to-manage-climate-risk-to-homes-mortgages-and-assets-finds-new-research.
3 https://en.wikipedia.org/wiki/Philadelphia_Contributionship 9/14/20
4 http://www.philadelphiabuildings.org/contributionship/timeline.cfm 10/11/20
5 https://www.ul.com/sites/g/files/qbfpbp251/files/2019-05/EngineeringProgress.pdf
6 https://en.wikipedia.org/wiki/Great_Chicago_Fire 9/13/20
7 https://en.wikipedia.org/wiki/List_of_town_and_city_fires 9/13/20
8 https://en.wikipedia.org/wiki/Stern_Review 9/13/20
9 https://en.wikipedia.org/wiki/Stern_Review 9/13/20
10 https://en.wikipedia.org/wiki/List_of_countries_by_GDP_(nominal
11 https://www.drawdown.org/drawdown-framework/drawdown-review-2020 page 88.
12 https://stats.oecd.org/Index.aspx?DatasetCode=INSIND