diff --git a/modules/21_tax/on/equations.gms b/modules/21_tax/on/equations.gms
index 8a3cf98e27895543fe3e3121fc126d09a937c5b3..5baf7adc3c6de62c15f952addf8e5b322036da18 100644
--- a/modules/21_tax/on/equations.gms
+++ b/modules/21_tax/on/equations.gms
@@ -63,7 +63,7 @@ v21_taxrevCO2luc(t,regi) =g= ( pm_taxCO2eq(t,regi) + pm_taxCO2eqSCC(t,regi) + p
- p21_taxrevCO2LUC0(t,regi);
***---------------------------------------------------------------------------
-*' Calculation of CCS tax: tax rate (defined as fraction(or multiplier) of O&M costs) times sequestration
+*' Calculation of CCS tax: tax rate (defined as fraction(or multiplier) of O&M costs) times amount of CO2 sequestration
*' Documentation of overall tax approach is above at q21_taxrev.
***---------------------------------------------------------------------------
q21_taxrevCCS(t,regi)$(t.val ge max(2010,cm_startyear))..
@@ -74,7 +74,7 @@ v21_taxrevCCS(t,regi)
- p21_taxrevCCS0(t,regi);
***---------------------------------------------------------------------------
-*' Calculation of net negative emissions tax: tax rate (defined as fraction of carbon price) times negative emissions
+*' Calculation of net-negative emissions tax: tax rate (defined as fraction of carbon price) times net-negative emissions
*' Documentation of overall tax approach is above at q21_taxrev.
***---------------------------------------------------------------------------
q21_taxrevNetNegEmi(t,regi)$(t.val ge max(2010,cm_startyear))..
@@ -82,7 +82,7 @@ v21_taxrevNetNegEmi(t,regi) =g= cm_frac_NetNegEmi * pm_taxCO2eq(t,regi) * v21_e
- p21_taxrevNetNegEmi0(t,regi);
***---------------------------------------------------------------------------
-*' Auxiliary calculation of negative emissions:
+*' Auxiliary calculation of net-negative emissions:
*' v21_emiAllco2neg and v21_emiAllco2neg_slack are defined as positive variables
*' so as long as vm_emiAll is positive, v21_emiAllco2neg_slack adjusts so that sum is zero
*' if vm_emiAll is negative, in order to minimize tax v21_emiAllco2neg_slack becomes zero
diff --git a/modules/33_CDR/DAC/equations.gms b/modules/33_CDR/DAC/equations.gms
index df0bcc2f40c4b7e5df666849fb063748b7e934c3..b87ab3e58aebc311b87ebb732991b8b7343805a4 100644
--- a/modules/33_CDR/DAC/equations.gms
+++ b/modules/33_CDR/DAC/equations.gms
@@ -5,7 +5,11 @@
*** | REMIND License Exception, version 1.0 (see LICENSE file).
*** | Contact: remind@pik-potsdam.de
*** SOF ./modules/33_CDR/DAC/equations.gms
-*** new default: gas for heat production is with CCS; assume 90% capture rate.
+
+***---------------------------------------------------------------------------
+*' Calculation of (negative) CO2 emissions from direct air capture. The first part of the equation describes emissions captured from the ambient air,
+*' the second part calculates the CO2 captured from the gas used for heat production assuming 90% capture rate.
+***---------------------------------------------------------------------------
q33_capconst_dac(t,regi)..
v33_emiDAC(t,regi)
=e=
@@ -13,26 +17,37 @@ q33_capconst_dac(t,regi)..
- (1 / pm_eta_conv(t,regi,"gash2c")) * fm_dataemiglob("pegas","seh2","gash2c","cco2") * vm_otherFEdemand(t,regi,"fegas")
;
+***---------------------------------------------------------------------------
+*' Sum of all CDR emissions other than BECCS and afforestation, which are calculated in the core.
+***---------------------------------------------------------------------------
q33_emicdrregi(t,regi)..
vm_emiCdr(t,regi,"co2")
=e=
v33_emiDAC(t,regi);
-*** fehes is only district heat. Use gas or h2 to generate heat for DAC plants.
-*** vm_otherFEdemand(t,regi,"fegas") is calculated as the total energy demand for heat minus what is already covered by h2, i.e. vm_otherFEdemand(t,regi,"feh2s") and vice versa.
+***---------------------------------------------------------------------------
+*' Calculation of energy demand of direct air capture. Heat can be provided by gas or H2;
+*' vm_otherFEdemand(t,regi,"fegas") is calculated as the total energy demand for heat minus what is already covered by h2, i.e. vm_otherFEdemand(t,regi,"feh2s") and vice versa.
+***---------------------------------------------------------------------------
q33_otherFEdemand(t,regi,entyFe)..
vm_otherFEdemand(t,regi,entyFe)
=e=
- vm_emiCdr(t,regi,"co2") * sm_EJ_2_TWa * p33_dac_fedem(entyFe)
- vm_otherFEdemand(t,regi,"feh2s")$(sameas(entyFe,"fegas")) - vm_otherFEdemand(t,regi,"fegas")$(sameas(entyFe,"feh2s"))
;
-
+
+***---------------------------------------------------------------------------
+*' Preparation of captured emissions to enter the CCS chain.
+***---------------------------------------------------------------------------
q33_ccsbal(t,regi,ccs2te(ccsCo2(enty),enty2,te))..
sum(teCCS2rlf(te,rlf), vm_ccs_cdr(t,regi,enty,enty2,te,rlf))
=e=
-vm_emiCdr(t,regi,"co2")
;
+***---------------------------------------------------------------------------
+*' Limit the amount of H2 from biomass to the demand without DAC.
+***---------------------------------------------------------------------------
q33_H2bio_lim(t,regi,te)..
vm_prodSE(t,regi,"pebiolc","seh2",te)$pe2se("pebiolc","seh2",te)
=l=
diff --git a/modules/33_CDR/DAC/realization.gms b/modules/33_CDR/DAC/realization.gms
index 97af2c6b6cd3ad083f5d6054313a4e07fff83ac9..a6a4f870d6857f1a3f01e4baf09f9131c6cc60da 100644
--- a/modules/33_CDR/DAC/realization.gms
+++ b/modules/33_CDR/DAC/realization.gms
@@ -6,6 +6,10 @@
*** | Contact: remind@pik-potsdam.de
*** SOF ./modules/33_CDR/DAC.gms
+*' @description
+*' In this realization, direct air capture can be used to remove CO2 from the atmosphere in addition to BECCS and afforestation. Based on Broehm et al. we assume an energy demand of
+*' 2 GJ/tCO2 electricity and 10 GJ/tCO2 heat which can be met via gas or H2. If gas is used, the resulting CO2 is captured with a capture rate of 90%.
+
*####################### R SECTION START (PHASES) ##############################
$Ifi "%phase%" == "sets" $include "./modules/33_CDR/DAC/sets.gms"
$Ifi "%phase%" == "declarations" $include "./modules/33_CDR/DAC/declarations.gms"
diff --git a/modules/33_CDR/DAC/sets.gms b/modules/33_CDR/DAC/sets.gms
index 03262a27dd4f6e7f68947e90496da99b7965cd0a..a6fb8f62aa8953bc6096eff729704bba86d457d5 100644
--- a/modules/33_CDR/DAC/sets.gms
+++ b/modules/33_CDR/DAC/sets.gms
@@ -7,7 +7,7 @@
*** SOF ./modules/33_CDR/DAC/sets.gms
sets
-te_dyn33(all_te) "???"
+te_dyn33(all_te) "all technologies"
/
dac "direct air capture"
/
diff --git a/modules/33_CDR/all/equations.gms b/modules/33_CDR/all/equations.gms
index df9c9bf19c337d3a3fa455e0e1863a1a4bdb8fb2..efefaa8c05cd18aad6230b78f9827f5bf2543df7 100644
--- a/modules/33_CDR/all/equations.gms
+++ b/modules/33_CDR/all/equations.gms
@@ -6,13 +6,19 @@
*** | Contact: remind@pik-potsdam.de
*** SOF ./modules/33_CDR/all/equations.gms
+***---------------------------------------------------------------------------
+*' Calculation of the amount of ground rock spread in timestep t.
+***---------------------------------------------------------------------------
q33_capconst_grindrock(t,regi)..
sum(rlf2,sum(rlf, v33_grindrock_onfield(t,regi,rlf,rlf2)))
=l=
sum(teNoTransform2rlf_dyn33(te,rlf2), vm_capFac(t,regi,"rockgrind") * vm_cap(t,regi,"rockgrind",rlf2))
;
-* JeS: timestep in 2060 not yet quite right!
+***---------------------------------------------------------------------------
+*' Calculation of the total amount of ground rock on the fields in timestep t. The first part of the equation describes the decay of the rocks added until that time,
+*' the rest describes the newly added rocks.
+***---------------------------------------------------------------------------
q33_grindrock_onfield_tot(ttot,regi,rlf,rlf2)$(ttot.val ge max(2010, cm_startyear))..
v33_grindrock_onfield_tot(ttot,regi,rlf,rlf2)
=e=
@@ -21,6 +27,9 @@ q33_grindrock_onfield_tot(ttot,regi,rlf,rlf2)$(ttot.val ge max(2010, cm_startyea
v33_grindrock_onfield(ttot,regi,rlf,rlf2) * (sum(tall $ ((tall.val le ttot.val) $ (tall.val gt (ttot.val-pm_ts(ttot)/2))),exp(-p33_co2_rem_rate(rlf) * (ttot.val-tall.val))))
;
+***---------------------------------------------------------------------------
+*' Calculation of (negative) CO2 emissions from enhanced weathering.
+***---------------------------------------------------------------------------
q33_emiEW(t,regi)..
v33_emiEW(t,regi)
=e=
@@ -29,20 +38,34 @@ q33_emiEW(t,regi)..
)
;
-*** new default: gas for heat production is with CCS; assume 90% capture rate.
+***---------------------------------------------------------------------------
+*' Calculation of (negative) CO2 emissions from direct air capture. The first part of the equation describes emissions captured from the ambient air,
+*' the second part calculates the CO2 captured from the gas used for heat production assuming 90% capture rate.
+***---------------------------------------------------------------------------
q33_capconst_dac(t,regi)..
v33_emiDAC(t,regi)
=e=
-sum(teNoTransform2rlf_dyn33(te,rlf2), vm_capFac(t,regi,"dac") * vm_cap(t,regi,"dac",rlf2))
- (1 / pm_eta_conv(t,regi,"gash2c")) * fm_dataemiglob("pegas","seh2","gash2c","cco2") * vm_otherFEdemand(t,regi,"fegas")
;
-
+
+***---------------------------------------------------------------------------
+*' Sum of all CDR emissions other than BECCS and afforestation, which are calculated in the core.
+***---------------------------------------------------------------------------
q33_emicdrregi(t,regi)..
vm_emiCdr(t,regi,"co2")
=e=
v33_emiEW(t,regi) + v33_emiDAC(t,regi)
;
-
+
+***---------------------------------------------------------------------------
+*' Calculation of energy demand of DAC and EW.
+*' The first part of the equation describes the electricity demand for grinding,
+*' the second part the diesel demand for transportation and spreading on crop fields.
+*' The third part is DAC electricity demand and the last part is DAC heat demand.
+*' Heat for DAC can be provided by gas or H2; vm_otherFEdemand(t,regi,"fegas") is calculated as the total
+*' DAC energy demand for heat minus what is already covered by h2, i.e. vm_otherFEdemand(t,regi,"feh2s") and vice versa.
+***---------------------------------------------------------------------------
q33_otherFEdemand(t,regi,entyFe)..
vm_otherFEdemand(t,regi,entyFe)
=e=
@@ -52,12 +75,18 @@ q33_otherFEdemand(t,regi,entyFe)..
- vm_otherFEdemand(t,regi,"feh2s")$(sameas(entyFe,"fegas")) - vm_otherFEdemand(t,regi,"fegas")$(sameas(entyFe,"feh2s"))
;
+***---------------------------------------------------------------------------
+*' Limit the amount of H2 from biomass to the demand without DAC.
+***---------------------------------------------------------------------------
q33_H2bio_lim(t,regi,te)..
vm_prodSE(t,regi,"pebiolc","seh2",te)$pe2se("pebiolc","seh2",te)
=l=
vm_prodFe(t,regi,"seh2","feh2s","tdh2s") - vm_otherFEdemand(t,regi,"feh2s")
;
+***---------------------------------------------------------------------------
+*' O&M costs of EW, consisting of fix costs for mining, grinding and spreading, and transportation costs.
+***---------------------------------------------------------------------------
q33_omcosts(t,regi)..
vm_omcosts_cdr(t,regi)
=e=
@@ -68,18 +97,27 @@ q33_omcosts(t,regi)..
)
)
;
-
+
+***---------------------------------------------------------------------------
+*' Limit total amount of ground rock on the fields to regional maximum potentials.
+***---------------------------------------------------------------------------
q33_potential(t,regi,rlf)..
sum(rlf2,v33_grindrock_onfield_tot(t,regi,rlf,rlf2))
=l=
f33_maxProdGradeRegiWeathering(regi,rlf);
-
+
+***---------------------------------------------------------------------------
+*' Preparation of captured emissions to enter the CCS chain.
+***---------------------------------------------------------------------------
q33_ccsbal(t,regi,ccs2te(ccsCo2(enty),enty2,te))..
sum(teCCS2rlf(te,rlf), vm_ccs_cdr(t,regi,enty,enty2,te,rlf))
=e=
-v33_emiDAC(t,regi)
;
-
+
+***---------------------------------------------------------------------------
+*' An annual limit for the maximum amount of rocks spred [Gt] can be set via cm_LimRock, e.g. due to sustainability concerns.
+***---------------------------------------------------------------------------
q33_LimEmiEW(t,regi)..
sum(rlf,
sum(rlf2,v33_grindrock_onfield(t,regi,rlf,rlf2))
diff --git a/modules/33_CDR/all/realization.gms b/modules/33_CDR/all/realization.gms
index c4566f79a100451cedd0a22cafd071de29595966..db4241e6d5e64bb08fd83ba38bebf43093de4cdb 100644
--- a/modules/33_CDR/all/realization.gms
+++ b/modules/33_CDR/all/realization.gms
@@ -6,6 +6,11 @@
*** | Contact: remind@pik-potsdam.de
*** SOF ./modules/33_CDR/all.gms
+*' @description
+*' In this realization, direct air capture and enhanced weathering can be used to remove CO2 from the atmosphere in addition to BECCS and afforestation. Based on Broehm et al. we assume an energy demand of
+*' 2 GJ/tCO2 electricity and 10 GJ/tCO2 heat for DAC which can be met via gas or H2. If gas is used, the resulting CO2 is captured with a capture rate of 90%.
+*' For EW, electricty is needed to grind the rocks and diesel is needed for transportation and spreading on crop fields.
+
*####################### R SECTION START (PHASES) ##############################
$Ifi "%phase%" == "sets" $include "./modules/33_CDR/all/sets.gms"
$Ifi "%phase%" == "declarations" $include "./modules/33_CDR/all/declarations.gms"
diff --git a/modules/33_CDR/all/sets.gms b/modules/33_CDR/all/sets.gms
index c88fc53f870810a973902643f3955f2dc20f2929..5d071d50cd21b47fde038e758638ad96f97ab6b5 100644
--- a/modules/33_CDR/all/sets.gms
+++ b/modules/33_CDR/all/sets.gms
@@ -7,7 +7,7 @@
*** SOF ./modules/33_CDR/all/sets.gms
sets
-te_dyn33(all_te) "???"
+te_dyn33(all_te) "all technologies"
/
rockgrind "grinding rock for enhanced weathering"
dac "direct air capture"
diff --git a/modules/33_CDR/module.gms b/modules/33_CDR/module.gms
index 1709d94eff45472097e34fc36fdcad74efaa18c9..73a4a52accf2510e0e30b454bbd57080c3e73f32 100644
--- a/modules/33_CDR/module.gms
+++ b/modules/33_CDR/module.gms
@@ -6,6 +6,12 @@
*** | Contact: remind@pik-potsdam.de
*** SOF ./modules/33_CDR/33_CDR.gms
+*' @title CDR
+*'
+*' @description The 33_CDR module calculates CO2 removed from the atmosphere by options other than BECCS or afforestation, which are calculated in the core.
+*'
+*' @authors Jessica Strefler
+
*###################### R SECTION START (MODULETYPES) ##########################
$Ifi "%CDR%" == "DAC" $include "./modules/33_CDR/DAC/realization.gms"
$Ifi "%CDR%" == "all" $include "./modules/33_CDR/all/realization.gms"
diff --git a/modules/33_CDR/off/realization.gms b/modules/33_CDR/off/realization.gms
index dc409de831fca38b129851ac1e7e98d620fc0ad2..988df6d91a79e53c260cc954e7376f5721874ab0 100644
--- a/modules/33_CDR/off/realization.gms
+++ b/modules/33_CDR/off/realization.gms
@@ -6,6 +6,9 @@
*** | Contact: remind@pik-potsdam.de
*** SOF ./modules/33_CDR/off.gms
+*' @description
+*' In this realization, no additional CDR option other than BECCS and afforestation is available.
+
*####################### R SECTION START (PHASES) ##############################
$Ifi "%phase%" == "declarations" $include "./modules/33_CDR/off/declarations.gms"
$Ifi "%phase%" == "bounds" $include "./modules/33_CDR/off/bounds.gms"
diff --git a/modules/33_CDR/weathering/equations.gms b/modules/33_CDR/weathering/equations.gms
index ec21906251d2839fdedd1f8119efe49014e73733..4da7f9e13fae964cae09cb29594881325eb35f11 100644
--- a/modules/33_CDR/weathering/equations.gms
+++ b/modules/33_CDR/weathering/equations.gms
@@ -6,6 +6,10 @@
*** | Contact: remind@pik-potsdam.de
*** SOF ./modules/33_CDR/weathering/equations.gms
+***---------------------------------------------------------------------------
+*' Calculation of the energy demand of enhanced weathering. The first part of the equation describes the electricity demand for grinding,
+*' the second part the diesel demand for transportation and spreading on crop fields.
+***---------------------------------------------------------------------------
q33_otherFEdemand(t,regi,entyFe)$(sameas(entyFe,"feels") OR sameas(entyFe,"fedie"))..
vm_otherFEdemand(t,regi,entyFe)$(sameas(entyFe,"feels") OR sameas(entyFe,"fedie"))
=e=
@@ -13,13 +17,19 @@ q33_otherFEdemand(t,regi,entyFe)$(sameas(entyFe,"feels") OR sameas(entyFe,"fedie
+ sum(rlf$(rlf.val le 2), s33_rockfield_fedem$(sameas(entyFe,"fedie")) * sm_EJ_2_TWa * sum(rlf2,v33_grindrock_onfield(t,regi,rlf,rlf2)))
;
+***---------------------------------------------------------------------------
+*' Calculation of the amount of ground rock spread in timestep t.
+***---------------------------------------------------------------------------
q33_capconst_grindrock(t,regi)..
sum(rlf2,sum(rlf$(rlf.val le 2), v33_grindrock_onfield(t,regi,rlf,rlf2)))
=l=
sum(teNoTransform2rlf_dyn33(te,rlf2), vm_capFac(t,regi,"rockgrind") * vm_cap(t,regi,"rockgrind",rlf2))
;
-* JeS: timestep in 2060 not yet quite right!
+***---------------------------------------------------------------------------
+*' Calculation of the total amount of ground rock on the fields in timestep t. The first part of the equation describes the decay of the rocks added until that time,
+*' the rest describes the newly added rocks.
+***---------------------------------------------------------------------------
q33_grindrock_onfield_tot(ttot,regi,rlf,rlf2)$((ttot.val ge max(2010, cm_startyear))$(rlf.val le 2))..
v33_grindrock_onfield_tot(ttot,regi,rlf,rlf2)$(rlf.val le 2)
=e=
@@ -28,6 +38,9 @@ q33_grindrock_onfield_tot(ttot,regi,rlf,rlf2)$((ttot.val ge max(2010, cm_startye
v33_grindrock_onfield(ttot,regi,rlf,rlf2)$(rlf.val le 2) * (sum(tall $ ((tall.val le ttot.val) $ (tall.val gt (ttot.val-pm_ts(ttot)/2))),exp(-p33_co2_rem_rate(rlf)$(rlf.val le 2) * (ttot.val-tall.val))))
;
+***---------------------------------------------------------------------------
+*' Calculation of (negative) CO2 emissions from enhanced weathering.
+***---------------------------------------------------------------------------
q33_emiEW(t,regi)..
v33_emiEW(t,regi)
=e=
@@ -36,12 +49,18 @@ q33_emiEW(t,regi)..
)
;
+***---------------------------------------------------------------------------
+*' Sum of all CDR emissions other than BECCS and afforestation, which are calculated in the core.
+***---------------------------------------------------------------------------
q33_emicdrregi(t,regi)..
vm_emiCdr(t,regi,"co2")
=e=
v33_emiEW(t,regi)
;
-
+
+***---------------------------------------------------------------------------
+*' O&M costs of EW, consisting of fix costs for mining, grinding and spreading, and transportation costs.
+***---------------------------------------------------------------------------
q33_omcosts_onfield(t,regi)..
vm_omcosts_cdr(t,regi)
=e=
@@ -52,12 +71,18 @@ q33_omcosts_onfield(t,regi)..
)
)
;
-
+
+***---------------------------------------------------------------------------
+*' Limit total amount of ground rock on the fields to regional maximum potentials.
+***---------------------------------------------------------------------------
q33_potential(t,regi,rlf)$(rlf.val le 2)..
sum(rlf2,v33_grindrock_onfield_tot(t,regi,rlf,rlf2)$(rlf.val le 2))
=l=
f33_maxProdGradeRegiWeathering(regi,rlf)$(rlf.val le 2);
+***---------------------------------------------------------------------------
+*' An annual limit for the maximum amount of rocks spred [Gt] can be set via cm_LimRock, e.g. due to sustainability concerns.
+***---------------------------------------------------------------------------
q33_LimEmiEW(t,regi)..
sum(rlf,
sum(rlf2,v33_grindrock_onfield(t,regi,rlf,rlf2))
diff --git a/modules/33_CDR/weathering/realization.gms b/modules/33_CDR/weathering/realization.gms
index 7a11cdd92b6900cf866c69d5898dba715139c1cd..de5a4affb8d6efb0f285a6f43f31b0f447a8a8ad 100644
--- a/modules/33_CDR/weathering/realization.gms
+++ b/modules/33_CDR/weathering/realization.gms
@@ -6,6 +6,10 @@
*** | Contact: remind@pik-potsdam.de
*** SOF ./modules/33_CDR/weathering.gms
+*' @description
+*' In this realization, enhanced weathering of rocks can be used to remove CO2 from the atmosphere in addition to BECCS and afforestation.
+*' Electricty is needed to grind the rocks and diesel is needed for transportation and spreading on crop fields.
+
*####################### R SECTION START (PHASES) ##############################
$Ifi "%phase%" == "sets" $include "./modules/33_CDR/weathering/sets.gms"
$Ifi "%phase%" == "declarations" $include "./modules/33_CDR/weathering/declarations.gms"
diff --git a/modules/33_CDR/weathering/sets.gms b/modules/33_CDR/weathering/sets.gms
index 159a043529ac5cbd11cd1079ccf345e0f28f14f2..acbb8acc93cbbf1dde4b397d8b9400122ddf35e7 100644
--- a/modules/33_CDR/weathering/sets.gms
+++ b/modules/33_CDR/weathering/sets.gms
@@ -7,7 +7,7 @@
*** SOF ./modules/33_CDR/weathering/sets.gms
sets
-te_dyn33(all_te) "???"
+te_dyn33(all_te) "all technologies"
/
rockgrind "grinding rock for enhanced weathering"
/
diff --git a/modules/39_CCU/module.gms b/modules/39_CCU/module.gms
index fd7983dc793e80384f3b1ed0a99aaa0031d0f4e2..476e61236ebda7c80119b41a84206517d5bf3496 100644
--- a/modules/39_CCU/module.gms
+++ b/modules/39_CCU/module.gms
@@ -6,6 +6,12 @@
*** | Contact: remind@pik-potsdam.de
*** SOF ./modules/39_CCU/39_CCU.gms
+*' @title CCU
+*'
+*' @description The 39_CCU module calculates emissions from synthetic gas and liquids.
+*'
+*' @authors Laura Popin, Jessica Strefler
+
*####################### R SECTION START (MODULETYPES) ##############################
$Ifi "%CCU%" == "off" $include "./modules/39_CCU/off/realization.gms"
$Ifi "%CCU%" == "on" $include "./modules/39_CCU/on/realization.gms"
diff --git a/modules/39_CCU/on/equations.gms b/modules/39_CCU/on/equations.gms
index 54c7c5cb9994b0af00d8de090c0b25b2df05310f..b0e053592076096d6ab5166806d2bf6739d2fc2e 100644
--- a/modules/39_CCU/on/equations.gms
+++ b/modules/39_CCU/on/equations.gms
@@ -8,9 +8,8 @@
***---------------------------------------------------------------------------
-*** LP
-*** Managing the C/H ratio in CCU-Technologies
-*** amount of C temporary used in CCU-products in relation to the amount of hydrogen necessary [GtC/y]
+*' Managing the C/H ratio in CCU-Technologies
+*' amount of C temporary used in CCU-products in relation to the amount of hydrogen necessary [GtC/y]
***---------------------------------------------------------------------------
q39_emiCCU(t,regi) ..