tag:blogger.com,1999:blog-6199410.post5753776896233955..comments2023-12-27T08:02:59.927-05:00Comments on Energy Outlook: Converting Coal to Synthetic Natural Gas in ChinaGeoffrey Styleshttp://www.blogger.com/profile/18047970229068397492noreply@blogger.comBlogger10125tag:blogger.com,1999:blog-6199410.post-67585417933206424862017-09-20T09:29:13.335-04:002017-09-20T09:29:13.335-04:00Evan,
Thanks for your comments. Always great to he...Evan,<br />Thanks for your comments. Always great to hear from those working on these things. <br /><br />I would have thought we have plenty of CO2 from power plants, other than the problem that most of it is pretty dilute and/or contains impurities that catalysts don't like.<br /><br />Geoffrey Styleshttps://www.blogger.com/profile/18047970229068397492noreply@blogger.comtag:blogger.com,1999:blog-6199410.post-72210518873457340882017-09-19T12:53:35.266-04:002017-09-19T12:53:35.266-04:00This is a great blog! It's refreshing to read...This is a great blog! It's refreshing to read a viewpoint unbiased by propoganda motivated by politics and sales-and from someone with experience. I've recently been working on a team developing fuel cell and fuel processing systems, etc. Like many, I've recently been thinking on the energy storage issue to better harness the growing renewable electrical grid. Being in the SOFC business, the market seems to want Hydrogen from us, but I can't help but wonder how this H2 is going to be used, stored, how far away, etc. In my search for applications, I've come across a lot of seemingly desperate storage ideas from batteries, thermal molten salt, mechanics, Ammonia, hydrogen, etc. I have decided to limit my focus to Mother Nature's favorite long shelf life, mass transportable method of energy storage-the fatty C-H bond. Many synthetic hydrocarbon technologies seem to rely upon ingredients which suggest an overall concept of un-combustion, which is great if the energy is free(renewable). I love the example of Audi's SNG plant, which claims to harness Germany's excess wind power to deliver SNG at ~70% efficiency. Is this plant still working well? If only we had more plentiful supplies of CO2.....evanhttps://www.blogger.com/profile/02893028910810951842noreply@blogger.comtag:blogger.com,1999:blog-6199410.post-46440095353652264212016-07-18T06:51:22.918-04:002016-07-18T06:51:22.918-04:00can anyone tell me how much of coal is gasified in...can anyone tell me how much of coal is gasified in china? pls provide a link..<br />thankyouAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-6199410.post-62341116325019205732014-03-03T09:45:12.090-05:002014-03-03T09:45:12.090-05:00Tony,
Thank you for sharing the performance figure...Tony,<br />Thank you for sharing the performance figures for the SNG process you're working on. The lifecycle emissions estimate with which you disagree didn't include CCS, so it isn't surprising your results with capture and sequestration would come in much lower. I'd encourage you to get in touch with the team at Duke University to go through the details of their analysis.<br /><br />As for the primary rationale behind China's SNG projects, it's a bit counterintuitive that investing incremental billions in converting coal to gas would result in lower delivered electricity costs by saving the rail costs for transporting coal to power plants, or by avoiding power transmission losses from mine-mouth generating plants, but perhaps the detailed analysis would show otherwise. Can you share those figures, too?Geoffrey Styleshttps://www.blogger.com/profile/18047970229068397492noreply@blogger.comtag:blogger.com,1999:blog-6199410.post-76250938080912184482014-03-02T16:39:21.486-05:002014-03-02T16:39:21.486-05:00Gents, I lead a team of ex-British Gas engineers d...Gents, I lead a team of ex-British Gas engineers developing a slightly modified version of the British Gas coal to SNG technology jointly developed by the UK government and British Gas Corporation between 1955 and 1992 to provide a replacement for UKCS natural Gas supplies when these were forecast to become depleted.<br /><br />I disagree with the statement that coal to SNG produces more CO2 emissions than straight coal combustion for power generation.<br /><br />The British Gas scheme in its final form using high pressure Oxygen blown slagging gasification at up to 93% cold gas efficiency in the BGL slagging gasifier, and up to 82.5% efficient conversion of syngas to synthetic methane using high temperature HICOM combined shift and methanation, with waste heat recovery to provide on site power and Oxygen production, modified to include CCS, produces low car on gas at 76.75% efficiency, complete with CCS.<br /><br />Assuming a 59% efficient state of the art CCGT this gives a coal to SNG to power efficiency of around 45% with CCS. No coal fired power station can compete with this overall efficiency and CO)2 emissions reduction.<br /><br />I believe that much of the reason for the planned big coal to SNG plants in Xinjiang is the ability to transport bulk energy more cheaply by pipeline than by power transmission line. The planned 2 x 30 bn cub m pa West to East China gas pipelines will carry the equivalent of 75% of total UK gas demand in 2 pipes.<br /><br />Best wishes,<br /><br />Tony Day<br /><br />h.samengo@hotmail.co.uk<br />M 0791 256 0740Tony Daynoreply@blogger.comtag:blogger.com,1999:blog-6199410.post-58853432179669943122014-02-15T16:45:30.883-05:002014-02-15T16:45:30.883-05:00No idea on hard numbers, I'm afraid; neither I...No idea on hard numbers, I'm afraid; neither I nor my company does work in power generation.jtfhttps://www.blogger.com/profile/10279035600714686610noreply@blogger.comtag:blogger.com,1999:blog-6199410.post-60481141479353639632014-02-11T13:42:45.398-05:002014-02-11T13:42:45.398-05:00jtf,
IGCC would probably make more sense, at least...jtf,<br />IGCC would probably make more sense, at least from an efficiency and thus emissions perspective, if they were starting from scratch. However, IGCC plants are expensive and complex to operate, and my sense from the research was that the target for the SNG was repowering existing coal plants w/ gas. I'd love to see some hard numbers on which path uses the least capital.Geoffrey Styleshttps://www.blogger.com/profile/18047970229068397492noreply@blogger.comtag:blogger.com,1999:blog-6199410.post-71279505442379407752014-02-11T11:46:53.806-05:002014-02-11T11:46:53.806-05:00Good point about capturing CO2 from (pure oxygen-u...Good point about capturing CO2 from (pure oxygen-using) gasifiers - I hadn't thought about it, but in retrospect it's obvious.<br /><br />I'm not so sure that indirect methane production is inherently more or less viable than integrated gasification combined cycle. If China is indeed looking for a solution to its most pressing air pollution problems - as you correctly note, particulate matter, sulfur and nitrogen aerosols, and others - then IGCC appears to present most of the advantages of coal-based methane production without the intermediate water-gas shift necessary to provide the appropriate stoichiometric number in the syngas for production of methane. Refining out of inorganic components is as viable given that the mechanisms (slagging in the gasifier, various gas scrubbing techniques) and it would appear to be intuitively more energy efficient on a lifecycle basis. It also gives the option of not using an ASP for pure oxygen production if you use an air-fed gasifier, although that obviates the advantage of CO2 capture that you mentioned in your piece.<br /><br />Obviously, the above only applies for power generation and a natural gas network is a clearly superior alternative to a coal-fired system for e.g. space heating, but it seems the current focus is on power generation and it seems to be easiest area to tackle. jtfhttps://www.blogger.com/profile/10279035600714686610noreply@blogger.comtag:blogger.com,1999:blog-6199410.post-57159018257904484802014-02-11T11:45:05.712-05:002014-02-11T11:45:05.712-05:00This comment has been removed by the author.jtfhttps://www.blogger.com/profile/10279035600714686610noreply@blogger.comtag:blogger.com,1999:blog-6199410.post-75690665532977391862014-01-24T23:02:31.969-05:002014-01-24T23:02:31.969-05:00Can you tell us how the value of high rank coal?Can you tell us how the value of high rank coal?Hanifhttp://bukuenergi.blogspot.com/2014/01/berlomba-lomba-dalam-mengkonsumsi-bbm.htmlnoreply@blogger.com