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    <element id="CETI_ProceedsFromNotesPayableRelatedParty" name="ProceedsFromNotesPayableRelatedParty" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_SharesIssuedForDepositOnDistributionAndManufacturingAgreement" name="SharesIssuedForDepositOnDistributionAndManufacturingAgreement" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_SharesIssuedForStockPriceGuarantee" name="SharesIssuedForStockPriceGuarantee" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_DebtDiscount" name="DebtDiscount" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_PreferredToCommonStockExchange" name="PreferredToCommonStockExchange" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_DebtDiscountOnConvertibleNotesPayable" name="DebtDiscountOnConvertibleNotesPayable" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_DisclosureStockOptionsAndWarrantsAbstract" name="DisclosureStockOptionsAndWarrantsAbstract" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_StockOptionsAndWarrantsDisclosureTextBlock" name="StockOptionsAndWarrantsDisclosureTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_DisclosureLongTermDepositAbstract" name="DisclosureLongTermDepositAbstract" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_LongTermDepositTextBlock" name="LongTermDepositTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_LoanReceivablePolicyTextBlock" name="LoanReceivablePolicyTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_GeographicInformationPolicyTextBlock" name="GeographicInformationPolicyTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_ConvertibleDebtPolicyTextBlock" name="ConvertibleDebtPolicyTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_ScheduleOfDerivativesAssumptionsUsedTableTextBlock" name="ScheduleOfDerivativesAssumptionsUsedTableTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_ScheduleOfChangesInFairValueInputsAndAssumptionsTableTextBlock" name="ScheduleOfChangesInFairValueInputsAndAssumptionsTableTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_ScheduleOfDisposalGroupsIncludingDiscontinuedOperationsAssetsAndLiabilitiesTableTextBlock" name="ScheduleOfDisposalGroupsIncludingDiscontinuedOperationsAssetsAndLiabilitiesTableTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_ScheduleOfDisposalGroupsIncludingDiscontinuedOperationsPropertyAndEquipmentAtCostTableTextBlock" name="ScheduleOfDisposalGroupsIncludingDiscontinuedOperationsPropertyAndEquipmentAtCostTableTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_LongLivedAssetsDescription" name="LongLivedAssetsDescription" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_AgreementRaisedMoney" name="AgreementRaisedMoney" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_AssetAmortization" name="AssetAmortization" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_AmortizationOfFinancingCostsAndDiscount" name="AmortizationOfFinancingCostsAndDiscount" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_AmortizationOfIntangibleAsset" name="AmortizationOfIntangibleAsset" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_IntellectualPropertyWriteOff" name="IntellectualPropertyWriteOff" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_PurchasePrice" name="PurchasePrice" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_RelatedPartyIssuedLoanAmount" name="RelatedPartyIssuedLoanAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_LoanPercentagePerYear" name="LoanPercentagePerYear" nillable="true" xbrli:periodType="instant" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_StockSharePaidPerValue" name="StockSharePaidPerValue" nillable="true" xbrli:periodType="instant" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_AdditionalInterestPaidInCash" name="AdditionalInterestPaidInCash" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_InterestPayableCurrentPerDay" name="InterestPayableCurrentPerDay" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_RevolvingLineOfCreditDescription" name="RevolvingLineOfCreditDescription" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_ConvertibleNotePayableRelatedParty" name="ConvertibleNotePayableRelatedParty" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_NotePayable" name="NotePayable" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_ConvertibleNotePayableCurrent" name="ConvertibleNotePayableCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_ConvertibleNotesPayables" name="ConvertibleNotesPayables" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_ConvertibleNotesPayableDescription" name="ConvertibleNotesPayableDescription" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_ConvertibleNotePayable" name="ConvertibleNotePayable" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_ConvertibleLongTermNotePayable" name="ConvertibleLongTermNotePayable" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_LongtermConvertibleNotesPayable" name="LongtermConvertibleNotesPayable" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_DebtInstrumenttotalOfInterest" name="DebtInstrumenttotalOfInterest" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_NotesPayableDescriptions" name="NotesPayableDescriptions" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_ConvertibleNotesPayableGross" name="ConvertibleNotesPayableGross" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_WarrantDerivatives" name="WarrantDerivatives" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_EmbeddedDerivativeGainOnEmbeddedDerivatives" name="EmbeddedDerivativeGainOnEmbeddedDerivatives" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_EmbeddedDerivativeLossOnIssuanceOfWarrants" name="EmbeddedDerivativeLossOnIssuanceOfWarrants" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_ChangeInFairValueOfWarrantDerivatives" name="ChangeInFairValueOfWarrantDerivatives" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskAdjustedInterestRate" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskAdjustedInterestRate" nillable="true" xbrli:periodType="duration" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_IssuancesAbstract" name="IssuancesAbstract" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_IssuanceOfEmbeddedDerivatives" name="IssuanceOfEmbeddedDerivatives" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_WarrantsDerivatives" name="WarrantsDerivatives" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_ChangesInFairValueInputsAndAssumptionsReflectedInIncome" name="ChangesInFairValueInputsAndAssumptionsReflectedInIncome" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_EquityMethodInvestmentsOwnershipPercentage" name="EquityMethodInvestmentsOwnershipPercentage" nillable="true" xbrli:periodType="instant" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_NotePayableRelatedParty" name="NotePayableRelatedParty" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_ConsultingService" name="ConsultingService" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_ConsultingFees" name="ConsultingFees" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_ConvertibleNotesPayableRelatedParty" name="ConvertibleNotesPayableRelatedParty" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_PreferredStockSharesDesignated" name="PreferredStockSharesDesignated" nillable="true" xbrli:periodType="instant" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_NumberOfSharesCancelled" name="NumberOfSharesCancelled" nillable="true" xbrli:periodType="instant" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_CommonStockSharesIssuedOther" name="CommonStockSharesIssuedOther" nillable="true" xbrli:periodType="instant" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_PreferredStockSharesIssuedOther" name="PreferredStockSharesIssuedOther" nillable="true" xbrli:periodType="instant" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_QuotedMarketPrice" name="QuotedMarketPrice" nillable="true" xbrli:periodType="instant" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_EffectiveContractualStrikePrice" name="EffectiveContractualStrikePrice" nillable="true" xbrli:periodType="instant" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_MarketVolatility" name="MarketVolatility" nillable="true" xbrli:periodType="instant" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_RiskadjustedInterestRate" name="RiskadjustedInterestRate" nillable="true" xbrli:periodType="instant" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_SharesPaid" name="SharesPaid" nillable="true" xbrli:periodType="instant" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_WarrantsReceived" name="WarrantsReceived" nillable="true" xbrli:periodType="instant" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights" name="ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights" nillable="true" xbrli:periodType="instant" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_WarrantsIssued" name="WarrantsIssued" nillable="true" xbrli:periodType="instant" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_StockholdersEquityNoteWarrantsAndRightsOutstandingArrangementShareIssuanceShares" name="StockholdersEquityNoteWarrantsAndRightsOutstandingArrangementShareIssuanceShares" nillable="true" xbrli:periodType="duration" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_ProceedsFromStockOptionsAndWarrantsExercised" name="ProceedsFromStockOptionsAndWarrantsExercised" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_StockPurchaseAgreementMaximumPurchasableAmount" name="StockPurchaseAgreementMaximumPurchasableAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_StockPurchaseAgreementCommitmentShares" name="StockPurchaseAgreementCommitmentShares" nillable="true" xbrli:periodType="instant" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_DisposalGroupIncludingDiscontinuedOperationCostOfGoodsSold" name="DisposalGroupIncludingDiscontinuedOperationCostOfGoodsSold" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_LossOnSalesOfAlveyOilField" name="LossOnSalesOfAlveyOilField" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_DiscontinuedOperationProvisionsForLossGainOnDisposalBeforeIncomeTax" name="DiscontinuedOperationProvisionsForLossGainOnDisposalBeforeIncomeTax" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_DisposalGroupIncludingDiscontinuedOperationAccountsPayableRelatedParty" name="DisposalGroupIncludingDiscontinuedOperationAccountsPayableRelatedParty" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_DisposalGroupIncludingDiscontinuedOperationNotesPayableCurrent" name="DisposalGroupIncludingDiscontinuedOperationNotesPayableCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_LiabilityOfDisposalGroupIncludingDiscontinuedOperationCurrent" name="LiabilityOfDisposalGroupIncludingDiscontinuedOperationCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_DisposalGroupIncludingDiscontinuedOperationPropertyPlantAndEquipmentEstimatedUsefulLives" name="DisposalGroupIncludingDiscontinuedOperationPropertyPlantAndEquipmentEstimatedUsefulLives" nillable="true" xbrli:periodType="duration" type="xbrli:durationItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_WriteDownCapitalizedCosts" name="WriteDownCapitalizedCosts" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_ImpairmentProvedProperties" name="ImpairmentProvedProperties" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_RailroadCommissionBondOfTexas" name="RailroadCommissionBondOfTexas" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_AdditionalContingentLiability" name="AdditionalContingentLiability" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_LessValuationAllowance" name="LessValuationAllowance" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_MaximumCommonStockIssued" name="MaximumCommonStockIssued" nillable="true" xbrli:periodType="instant" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_OfferingPrice" name="OfferingPrice" nillable="true" xbrli:periodType="instant" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_OfferingPriceReduced" name="OfferingPriceReduced" nillable="true" xbrli:periodType="instant" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_OfferingTerminated" name="OfferingTerminated" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_MaximumSaleOfCommonStock" name="MaximumSaleOfCommonStock" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_DebtIssuanceCostsIncurredDuringPeriod" name="DebtIssuanceCostsIncurredDuringPeriod" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_ProceedsFromIssuanceOfDebtNet" name="ProceedsFromIssuanceOfDebtNet" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_WeightedAverageRemainingContractualLifeIssued" name="WeightedAverageRemainingContractualLifeIssued" nillable="true" xbrli:periodType="duration" type="xbrli:durationItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_NumberOfSharesWarrantsIssuedUnderFullRatchetProtection" name="NumberOfSharesWarrantsIssuedUnderFullRatchetProtection" nillable="true" xbrli:periodType="duration" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_WeightedAverageExercisePriceIssuedUnderFullRatchetProtection" name="WeightedAverageExercisePriceIssuedUnderFullRatchetProtection" nillable="true" xbrli:periodType="duration" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_WeightedAverageRemainingContractualLifeWarrantsIssued" name="WeightedAverageRemainingContractualLifeWarrantsIssued" nillable="true" xbrli:periodType="duration" type="xbrli:durationItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_ManufacturingAndDistributionAgreementTerm" name="ManufacturingAndDistributionAgreementTerm" nillable="true" xbrli:periodType="duration" type="xbrli:durationItemType" substitutionGroup="xbrli:item" />
</schema>
