![Sivachidambaram Sadasivam](https://profiles-cardiff.imgix.net/attachments/6441?w=200&h=200&auto=format&crop=faces&fit=crop&q=90")
Dr Sivachidambaram Sadasivam
Timau a rolau for Sivachidambaram Sadasivam
Cymrawd Ymchwil
Trosolwg
Rwy'n helpu i ddatblygu ac arddangos atebion ymarferol i heriau ynni ac amgylcheddol cymhleth trwy integreiddio gwyddorau cemegol, peirianneg, ymchwil deunyddiau a pholisi ynni. Fel Cymrawd Ymchwil ym Mhrifysgol Caerdydd, mae gennyf dros 13 mlynedd o ymchwil ôl-PhD a phrofiad arddangos ar raddfa beilot, gyda ffocws cryf ar ddatblygu technolegau sy'n dod i'r amlwg o ymchwil sylfaenol tuag at gymhwysiad diwydiannol.
Mae fy ymchwil gyfredol yn canolbwyntio ar systemau ynni integredig amonia-hydrogen, gan gynnwys cracio amonia ar raddfa ddiwydiannol ar gyfer cynhyrchu hydrogen, technolegau gwres a phŵer carbon isel, cludo hydrogen, a deunyddiau sy'n gydnaws â hydrogen/amonia. Mae gennyf hefyd brofiad ymchwil helaeth mewn dal carbon a storio CO₂ daearegol, adfer methan gwell, gwresogi dŵr mwynglawdd, nwyeiddio glo tanddaearol a rheoli gwastraff niwclear.
Mae fy athroniaeth ymchwil yn canolbwyntio ar hyrwyddo parodrwydd technoleg trwy ddilysu arbrofol, cydweithredu amlddisgyblaethol ac arddangosiad yn y byd go iawn. Rwy'n anelu at gyfieithu syniadau ymchwil a chanlyniadau arbrofol i atebion technegol gadarn, masnachol credadwy a pherthnasol i bolisi a all gyfrannu at y trawsnewidiad i sero net.
Diddordebau ymchwil penodol:
- Arddangos systemau ynni integredig amonia-hydrogen, gan gynnwys boeleri, systemau gwres a phŵer cyfun a phympiau gwres.
- Datblygu trawsnewidyddion catalytig ar gyfer cracio amonia yn y fan a'r lle effeithlon a systemau tanwydd carbon isel hydrogen-amonia.
- Cludo a defnyddio hydrogen effeithlon, gan gynnwys deunyddiau sy'n gydnaws â hydrogen/amonia.
- Dal carbon, storio CO₂ daearegol ac adfer methan gwell.
Cyhoeddiad
2026
- Thomas, H. R. , Sadasivam, S. and Almolliyeh, M. 2026. CO2 storage in coal seams: a case study-based review of the opportunities and challenges. Environmental, Geological and Geotechnical Engineering 1 (1) 100005. (10.1016/j.egge.2026.100005)
- Mehdipour, R. et al., 2026. Utilizing aqua-ammonia as a clean and scalable fuel in steam power plants. Applied Thermal Engineering 290 130132. (10.1016/j.applthermaleng.2026.130132)
2025
- Balakrishnan, A. et al. 2025. Experimental demonstration of in-situ cracked premixed swirl NH3-air flames. Applied Energy 401 (Part B) 126754. (10.1016/j.apenergy.2025.126754)
2024
- Wiatowski, M. et al., 2024. Experimental study on tar formation during underground coal gasification: Effect of coal rank and gasification pressure on tar yield and chemical composition. Fuel 357 130034. (10.1016/j.fuel.2023.130034)
2023
- Almolliyeh, M. et al. 2023. Experimental investigation of CO2-CH4 core flooding in large intact bituminous coal cores using bespoke hydrostatic core holder. International Journal of Coal Geology 279 104376. (10.1016/j.coal.2023.104376)
- Stańczyk, K. et al., 2023. CO 2 injection via a horizontal well into the coal seam at the Experimental Mine Barbara in Poland. Energies 16 (20) 7217. (10.3390/en16207217)
- Almolliyeh, M. et al. 2023. Subcritical CO2 adsorption on geomaterials of coal-bearing strata in the context of geological carbon sequestration. International Journal of Coal Geology 277 104340. (10.1016/j.coal.2023.104340)
- Wiatowski, M. et al., 2023. Large-scale ex situ tests for CO 2 storage in coal beds. Energies 16 (17) 6326. (10.3390/en16176326)
- Almolliyeh, M. et al. 2023. Effect of physical nature (intact and powder) of coal on CO2 adsorption at the subcritical pressure range (up to 6.4 MPa at 298.15 K). ACS Omega 8 (7), pp.7070-7084. (10.1021/acsomega.2c07940)
- Chen, M. et al. 2023. Modeling gas adsorption-desorption hysteresis in energetically heterogeneous coal and shale. Energy and Fuels 37 (3), pp.2149-2163. (10.1021/acs.energyfuels.2c03441)
- Masum, S. A. et al. 2023. Low subcritical co2 adsorption-desorption behavior of intact bituminous coal cores extracted from a shallow coal seam. Langmuir 39 (4), pp.1548-1561. (10.1021/acs.langmuir.2c02971)
2022
- Kapusta, K. et al., 2022. Experimental simulations of methane-oriented underground coal gasification using hydrogen - The effect of coal rank and gasification pressure on the hydrogasification process. International Journal of Hydrogen Energy (10.1016/j.ijhydene.2022.10.012)
- Sadasivam, S. et al. 2022. Kinetics of gas phase CO2 adsorption on bituminous coal from a shallow coal seam. Energy and Fuels 36 (15), pp.8360–8370. (10.1021/acs.energyfuels.2c01426)
- Chen, M. et al. 2022. Modelling anisotropic adsorption-induced coal swelling and stress dependent anisotropic permeability. International Journal of Rock Mechanics and Mining Sciences 153 105107. (10.1016/j.ijrmms.2022.105107)
- Sadasivam, S. et al. 2022. Characterisation of inorganic constitutions of condensate and solid residue generated from small-scale ex situ experiments in the context of underground coal gasification. Environmental Science and Pollution Research 29 , pp.2203-2213. (10.1007/s11356-021-15780-8)
2020
- Sadasivam, S. et al. 2020. Characterisation of the contaminants generated from a large-scale ex-situ underground coal gasification study using high-rank coal from the South Wales coalfield. Water, Air, and Soil Pollution 231 519. (10.1007/s11270-020-04888-1)
- Zagorščak, R. et al. 2020. Experimental study of underground coal gasification (UCG) of a high-rank coal using atmospheric and high-pressure conditions in an ex-situ reactor. Fuel 270 117490. (10.1016/j.fuel.2020.117490)
- Brabham, P. et al. 2020. The potential use of mine water for a district heating scheme: A case study, Caerau, Upper Llynfi valley, South Wales, UK. Quarterly Journal of Engineering Geology and Hydrogeology 53 (1) 145. (10.1144/qjegh2018-213)
- Sadasivam, S. et al. 2020. Experimental study of methane-oriented gasification of semi-anthracite and bituminous coals using oxygen and steam in the context of underground coal gasification (UCG): Effects of pressure, temperature, gasification reactant supply rates and coal rank. Fuel 268 117330. (10.1016/j.fuel.2020.117330)
2019
- Sadasivam, S. et al. 2019. Baseline geochemical study of the Aberpergwm mining site in the South Wales Coalfield. Journal of Geochemical Exploration 202 , pp.100-112. (10.1016/j.gexplo.2019.03.006)
2016
- Farr, G. et al., 2016. Low enthalpy heat recovery potential from coal mine discharges in the South Wales coalfield. International Journal of Coal Geology 164 , pp.92-103. (10.1016/j.coal.2016.05.008)
- Farr, G. et al., 2016. The hydrology of an ephemerally flooded doline: Pwll-y-Felin, South Wales, UK. Cave and Karst Science 43 (1), pp.41-47.
- Sadasivam, S. and Rao, S. M. 2016. Characterization of silver-kaolinite (AgK): an adsorbent for long-lived 129I species. SpringerPlus 5 142. (10.1186/s40064-016-1855-8)
- Sadasivam, S. and Thomas, H. R. 2016. Colour and toxic characteristics of metakaolinite-hematite pigment for integrally coloured concrete, prepared from iron oxide recovered from a water treatment plant of an abandoned coal mine. Journal of Solid State Chemistry 239 , pp.246-250. (10.1016/j.jssc.2016.05.003)
2013
- Pal, R. , Rao, S. M. and Sadasivam, S. 2013. Mitigation of cromium contamination by copper-ZVI bimetallic particles. Journal of Hazardous, Toxic, and Radioactive Waste 17 (3), pp.181-186. 121109182659002. (10.1061/(ASCE)HZ.2153-5515.0000169)
- Rao, S. M. , Asha, K. and Sadasivam, S. 2013. Influence of anthropogenic contamination on groundwater chemistry in Mulbagal town, Kolar District, India. Geosciences Journal 17 (1), pp.97-106. (10.1007/s12303-013-0007-1)
- Rao, S. M. and Sadasivam, S. 2013. Characterization and iodide adsorption behaviour of HDPY+ modified bentonite. Environmental Earth Sciences 68 (2), pp.559-566. (10.1007/s12665-012-1759-z)
2012
- Sadasivam, S. and Rao, S. M. 2012. Iodide retention by modified kaolinite in the context of safe disposal of high level nuclear waste. Journal of Hazardous, Toxic, and Radioactive Waste 16 (3), pp.192-200. (10.1061/(ASCE)HZ.2153-5515.0000121)
Erthyglau
- Thomas, H. R. , Sadasivam, S. and Almolliyeh, M. 2026. CO2 storage in coal seams: a case study-based review of the opportunities and challenges. Environmental, Geological and Geotechnical Engineering 1 (1) 100005. (10.1016/j.egge.2026.100005)
- Mehdipour, R. et al., 2026. Utilizing aqua-ammonia as a clean and scalable fuel in steam power plants. Applied Thermal Engineering 290 130132. (10.1016/j.applthermaleng.2026.130132)
- Balakrishnan, A. et al. 2025. Experimental demonstration of in-situ cracked premixed swirl NH3-air flames. Applied Energy 401 (Part B) 126754. (10.1016/j.apenergy.2025.126754)
- Wiatowski, M. et al., 2024. Experimental study on tar formation during underground coal gasification: Effect of coal rank and gasification pressure on tar yield and chemical composition. Fuel 357 130034. (10.1016/j.fuel.2023.130034)
- Almolliyeh, M. et al. 2023. Experimental investigation of CO2-CH4 core flooding in large intact bituminous coal cores using bespoke hydrostatic core holder. International Journal of Coal Geology 279 104376. (10.1016/j.coal.2023.104376)
- Stańczyk, K. et al., 2023. CO 2 injection via a horizontal well into the coal seam at the Experimental Mine Barbara in Poland. Energies 16 (20) 7217. (10.3390/en16207217)
- Almolliyeh, M. et al. 2023. Subcritical CO2 adsorption on geomaterials of coal-bearing strata in the context of geological carbon sequestration. International Journal of Coal Geology 277 104340. (10.1016/j.coal.2023.104340)
- Wiatowski, M. et al., 2023. Large-scale ex situ tests for CO 2 storage in coal beds. Energies 16 (17) 6326. (10.3390/en16176326)
- Almolliyeh, M. et al. 2023. Effect of physical nature (intact and powder) of coal on CO2 adsorption at the subcritical pressure range (up to 6.4 MPa at 298.15 K). ACS Omega 8 (7), pp.7070-7084. (10.1021/acsomega.2c07940)
- Chen, M. et al. 2023. Modeling gas adsorption-desorption hysteresis in energetically heterogeneous coal and shale. Energy and Fuels 37 (3), pp.2149-2163. (10.1021/acs.energyfuels.2c03441)
- Masum, S. A. et al. 2023. Low subcritical co2 adsorption-desorption behavior of intact bituminous coal cores extracted from a shallow coal seam. Langmuir 39 (4), pp.1548-1561. (10.1021/acs.langmuir.2c02971)
- Kapusta, K. et al., 2022. Experimental simulations of methane-oriented underground coal gasification using hydrogen - The effect of coal rank and gasification pressure on the hydrogasification process. International Journal of Hydrogen Energy (10.1016/j.ijhydene.2022.10.012)
- Sadasivam, S. et al. 2022. Kinetics of gas phase CO2 adsorption on bituminous coal from a shallow coal seam. Energy and Fuels 36 (15), pp.8360–8370. (10.1021/acs.energyfuels.2c01426)
- Chen, M. et al. 2022. Modelling anisotropic adsorption-induced coal swelling and stress dependent anisotropic permeability. International Journal of Rock Mechanics and Mining Sciences 153 105107. (10.1016/j.ijrmms.2022.105107)
- Sadasivam, S. et al. 2022. Characterisation of inorganic constitutions of condensate and solid residue generated from small-scale ex situ experiments in the context of underground coal gasification. Environmental Science and Pollution Research 29 , pp.2203-2213. (10.1007/s11356-021-15780-8)
- Sadasivam, S. et al. 2020. Characterisation of the contaminants generated from a large-scale ex-situ underground coal gasification study using high-rank coal from the South Wales coalfield. Water, Air, and Soil Pollution 231 519. (10.1007/s11270-020-04888-1)
- Zagorščak, R. et al. 2020. Experimental study of underground coal gasification (UCG) of a high-rank coal using atmospheric and high-pressure conditions in an ex-situ reactor. Fuel 270 117490. (10.1016/j.fuel.2020.117490)
- Brabham, P. et al. 2020. The potential use of mine water for a district heating scheme: A case study, Caerau, Upper Llynfi valley, South Wales, UK. Quarterly Journal of Engineering Geology and Hydrogeology 53 (1) 145. (10.1144/qjegh2018-213)
- Sadasivam, S. et al. 2020. Experimental study of methane-oriented gasification of semi-anthracite and bituminous coals using oxygen and steam in the context of underground coal gasification (UCG): Effects of pressure, temperature, gasification reactant supply rates and coal rank. Fuel 268 117330. (10.1016/j.fuel.2020.117330)
- Sadasivam, S. et al. 2019. Baseline geochemical study of the Aberpergwm mining site in the South Wales Coalfield. Journal of Geochemical Exploration 202 , pp.100-112. (10.1016/j.gexplo.2019.03.006)
- Farr, G. et al., 2016. Low enthalpy heat recovery potential from coal mine discharges in the South Wales coalfield. International Journal of Coal Geology 164 , pp.92-103. (10.1016/j.coal.2016.05.008)
- Farr, G. et al., 2016. The hydrology of an ephemerally flooded doline: Pwll-y-Felin, South Wales, UK. Cave and Karst Science 43 (1), pp.41-47.
- Sadasivam, S. and Rao, S. M. 2016. Characterization of silver-kaolinite (AgK): an adsorbent for long-lived 129I species. SpringerPlus 5 142. (10.1186/s40064-016-1855-8)
- Sadasivam, S. and Thomas, H. R. 2016. Colour and toxic characteristics of metakaolinite-hematite pigment for integrally coloured concrete, prepared from iron oxide recovered from a water treatment plant of an abandoned coal mine. Journal of Solid State Chemistry 239 , pp.246-250. (10.1016/j.jssc.2016.05.003)
- Pal, R. , Rao, S. M. and Sadasivam, S. 2013. Mitigation of cromium contamination by copper-ZVI bimetallic particles. Journal of Hazardous, Toxic, and Radioactive Waste 17 (3), pp.181-186. 121109182659002. (10.1061/(ASCE)HZ.2153-5515.0000169)
- Rao, S. M. , Asha, K. and Sadasivam, S. 2013. Influence of anthropogenic contamination on groundwater chemistry in Mulbagal town, Kolar District, India. Geosciences Journal 17 (1), pp.97-106. (10.1007/s12303-013-0007-1)
- Rao, S. M. and Sadasivam, S. 2013. Characterization and iodide adsorption behaviour of HDPY+ modified bentonite. Environmental Earth Sciences 68 (2), pp.559-566. (10.1007/s12665-012-1759-z)
- Sadasivam, S. and Rao, S. M. 2012. Iodide retention by modified kaolinite in the context of safe disposal of high level nuclear waste. Journal of Hazardous, Toxic, and Radioactive Waste 16 (3), pp.192-200. (10.1061/(ASCE)HZ.2153-5515.0000121)
Ymchwil
Contractau
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Myfyrwyr dan oruchwyliaeth
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Bywgraffiad
Rwy'n ymchwilydd rhyngddisgyblaethol sy'n mynd i'r afael â heriau ynni, amgylcheddol a datgarboneiddio cymhleth trwy gyfuno gwyddorau cemegol ac egwyddorion peirianneg. Fel arweinydd ysbrydoledig, mae fy athroniaeth ymchwil yn troi o amgylch datblygiad strategol lefelau parodrwydd technoleg y gellir eu dangos yn effeithiol mewn senarios byd go iawn. Fy mlaenoriaeth fwyaf yw meithrin syniadau ymchwil diriaethol a harneisio canlyniadau arbrofol i arddangos gallu technegol a dichonoldeb masnachol gweithrediadau ynni anghonfensiynol i gyflawni nodau sero net.
Ar ôl cyfnod llwyddiannus fel cyswllt cydlynydd a chwilioar gyfer prosiect ROCCS,
Prosiect €2 M a ariennir gan Gronfa Ymchwil y Comisiwn Ewropeaidd ar gyfer Dur Glo (EC/RFCS) i ddangos storio CO 2 ar raddfa beilot mewn gwythiennau glo, ac roeddwn i'n gwerthfawrogi fel ymgynghorydd allanol ar gyfercyflawni a rheoli prosiectau. Cyn ymuno â'r prosiect, cyfrannais fy ngwybodaeth a'm sgiliau at gyd-gyflawni'r prosiectau ymchwil, datblygu ac arloesi (RD&I) gwerth uchel canlynol a ariennir gan y Comisiwn Ewropeaidd ym Mhrifysgol Caerdydd:
1. MEGA +, prosiect € 2.8 miliwn a ariennir gan EC / RFCS (2018–2019): Fe wnes i reoli a chyflwyno'r rhaglen arbrofol o brofion nwyeiddio glo tanddaearol rhagarweiniol ar gyfer y prosiect MEGA +, yn ogystal â chefnogi'r rhaglen arbrofol ex-situ ar raddfa fawr yn Sefydliad Mwyngloddio Canolog Gwlad Pwyl.
2. Mae SEREN yn brosiect ymchwil a datblygu gwerth £10.4 miliwn EC/ERDF (Cronfa Datblygu Rhanbarthol Ewrop) sy'n canolbwyntio ar ddatblygu technolegau peirianneg arloesol ar gyfer cymwysiadau masnachol yn y sector geo-ynni. Fy nghyfraniad oedd meintioli ac asesu potensial ynni mwyngloddiau argyfer gwresogi ardal, a chydnabuwyd y gwaith hwn yn Briffio Ymchwil y Cynulliad Cymru. Roedd y profiad hwn hefyd yn cynnwys caffael setiau data ar gyfer prosiectau arddangos gwresogi dŵr mwyngloddiau cyntaf o'i fath yng Nghymru (1. Cynllun gwresogi ardal yng Nghaerau, Cwm Llynfi Uchaf, De Cymru, y DU, a 2. Gwresogi dŵr mwynglawdd ar raddfa beilot ffermdy yng Nghrynant, Cymru).
3. Mae FLEXIS yn rhaglen ymchwil a datblygu systemau ynni hyblyg ac integredig gwerth £30 miliwn gwerth £30 miliwn gyda'r nod o ddatblygu systemau ynni hyblyg ac integredig. Fy ngorchwyl oedd ymchwilio i botensial geo-ynni maes glo De Cymru. Fy mhrif gyflawniad oedd rheoli drilio tri thwll turio 500 i 600 metr o hyd ym Maes Glo De Cymru i gasglu data gwaelodlin (geoffisegol-cemegol) ar gyfer gweithrediadau ynni anghonfensiynol yn y dyfodol . Yn ystod fy amser yn FLEXIS, helpais i lansio prosiect gwresogi dŵr mwynglawdd Llynfi Vally.
Ar hyn o bryd, rwy'n gweithio i'r Ganolfan Ragoriaeth ar gyfer Technoleg Amonia (CEAT) i greu trawsnewidyddion catalytig ar gyfer cracio amonia yn y fan a'r lle yn effeithlon. Rwy'n gwasanaethu fel Cyd-Ymchwilydd ar brosiectau Amonia Gaeaf (£3M) a ariennir gan EPSRC, cronfa Impact Accelartor a ariennir gan GW-Shift (£20K), a'r Gronfa Secondiad (£15K) sy'n rhychwantu deunyddiau amonia, hydrogen/amonia, a thrafnidiaeth hydrogen ar gyfer rhwydwaith rheilffyrdd celloedd tanwydd H2.
Mae Prifysgol Caerdydd wedi dyfarnu'r Wobr Cyfraniad Eithriadol i mi am fy nghyfraniadau ymchwil i'r prosiectau uchod rhwng 2018 a 2019. Cyn dechrau ym Mhrifysgol Caerdydd, gweithiais ar gynnwys gwastraff niwclear daearegol ar gyfer fy PhD. Ariannwyd fy PhD gan Weinyddiaeth Adnoddau Dynol India, ac roedd yn canolbwyntio ar ddatblygu deunyddiau clai i gadw'r elfen ymbelydrol ffo Ïodin-129.